Merge tag 'upstream-3.19-rc1' of git://git.infradead.org/linux-ubifs

Pull UBI/UBIFS updates from Artem Bityutskiy:
 "This includes the following UBI/UBIFS changes:
   - UBI debug messages now include the UBI device number.  This change
     is responsible for the big diffstat since it touched every
     debugging print statement.
   - An Xattr bug-fix which fixes SELinux support
   - Several error path fixes in UBI/UBIFS"

* tag 'upstream-3.19-rc1' of git://git.infradead.org/linux-ubifs:
  UBI: Fix invalid vfree()
  UBI: Fix double free after do_sync_erase()
  UBIFS: fix a couple bugs in UBIFS xattr length calculation
  UBI: vtbl: Use ubi_eba_atomic_leb_change()
  UBI: Extend UBI layer debug/messaging capabilities
  UBIFS: fix budget leak in error path

15 files changed, 459 insertions, 432 deletions

diff --git a/drivers/mtd/ubi/attach.c b/drivers/mtd/ubi/attach.c
index 6f27d9a1be3b..9d2e16f3150a 100644
--- a/drivers/mtd/ubi/attach.c
+++ b/drivers/mtd/ubi/attach.c
@@ -176,6 +176,7 @@ static int add_corrupted(struct ubi_attach_info *ai, int pnum, int ec)
 
 /**
  * validate_vid_hdr - check volume identifier header.
+ * @ubi: UBI device description object
  * @vid_hdr: the volume identifier header to check
  * @av: information about the volume this logical eraseblock belongs to
  * @pnum: physical eraseblock number the VID header came from
@@ -188,7 +189,8 @@ static int add_corrupted(struct ubi_attach_info *ai, int pnum, int ec)
  * information in the VID header is consistent to the information in other VID
  * headers of the same volume.
  */
-static int validate_vid_hdr(const struct ubi_vid_hdr *vid_hdr,
+static int validate_vid_hdr(const struct ubi_device *ubi,
+			    const struct ubi_vid_hdr *vid_hdr,
 			    const struct ubi_ainf_volume *av, int pnum)
 {
 	int vol_type = vid_hdr->vol_type;
@@ -206,7 +208,7 @@ static int validate_vid_hdr(const struct ubi_vid_hdr *vid_hdr,
 		 */
 
 		if (vol_id != av->vol_id) {
-			ubi_err("inconsistent vol_id");
+			ubi_err(ubi, "inconsistent vol_id");
 			goto bad;
 		}
 
@@ -216,17 +218,17 @@ static int validate_vid_hdr(const struct ubi_vid_hdr *vid_hdr,
 			av_vol_type = UBI_VID_DYNAMIC;
 
 		if (vol_type != av_vol_type) {
-			ubi_err("inconsistent vol_type");
+			ubi_err(ubi, "inconsistent vol_type");
 			goto bad;
 		}
 
 		if (used_ebs != av->used_ebs) {
-			ubi_err("inconsistent used_ebs");
+			ubi_err(ubi, "inconsistent used_ebs");
 			goto bad;
 		}
 
 		if (data_pad != av->data_pad) {
-			ubi_err("inconsistent data_pad");
+			ubi_err(ubi, "inconsistent data_pad");
 			goto bad;
 		}
 	}
@@ -234,7 +236,7 @@ static int validate_vid_hdr(const struct ubi_vid_hdr *vid_hdr,
 	return 0;
 
 bad:
-	ubi_err("inconsistent VID header at PEB %d", pnum);
+	ubi_err(ubi, "inconsistent VID header at PEB %d", pnum);
 	ubi_dump_vid_hdr(vid_hdr);
 	ubi_dump_av(av);
 	return -EINVAL;
@@ -336,7 +338,7 @@ int ubi_compare_lebs(struct ubi_device *ubi, const struct ubi_ainf_peb *aeb,
 		 * support these images anymore. Well, those images still work,
 		 * but only if no unclean reboots happened.
 		 */
-		ubi_err("unsupported on-flash UBI format");
+		ubi_err(ubi, "unsupported on-flash UBI format");
 		return -EINVAL;
 	}
 
@@ -377,7 +379,7 @@ int ubi_compare_lebs(struct ubi_device *ubi, const struct ubi_ainf_peb *aeb,
 			if (err == UBI_IO_BITFLIPS)
 				bitflips = 1;
 			else {
-				ubi_err("VID of PEB %d header is bad, but it was OK earlier, err %d",
+				ubi_err(ubi, "VID of PEB %d header is bad, but it was OK earlier, err %d",
 					pnum, err);
 				if (err > 0)
 					err = -EIO;
@@ -507,7 +509,7 @@ int ubi_add_to_av(struct ubi_device *ubi, struct ubi_attach_info *ai, int pnum,
 		 * logical eraseblocks because there was an unclean reboot.
 		 */
 		if (aeb->sqnum == sqnum && sqnum != 0) {
-			ubi_err("two LEBs with same sequence number %llu",
+			ubi_err(ubi, "two LEBs with same sequence number %llu",
 				sqnum);
 			ubi_dump_aeb(aeb, 0);
 			ubi_dump_vid_hdr(vid_hdr);
@@ -527,7 +529,7 @@ int ubi_add_to_av(struct ubi_device *ubi, struct ubi_attach_info *ai, int pnum,
 			 * This logical eraseblock is newer than the one
 			 * found earlier.
 			 */
-			err = validate_vid_hdr(vid_hdr, av, pnum);
+			err = validate_vid_hdr(ubi, vid_hdr, av, pnum);
 			if (err)
 				return err;
 
@@ -565,7 +567,7 @@ int ubi_add_to_av(struct ubi_device *ubi, struct ubi_attach_info *ai, int pnum,
 	 * attaching information.
 	 */
 
-	err = validate_vid_hdr(vid_hdr, av, pnum);
+	err = validate_vid_hdr(ubi, vid_hdr, av, pnum);
 	if (err)
 		return err;
 
@@ -668,7 +670,8 @@ static int early_erase_peb(struct ubi_device *ubi,
 		 * Erase counter overflow. Upgrade UBI and use 64-bit
 		 * erase counters internally.
 		 */
-		ubi_err("erase counter overflow at PEB %d, EC %d", pnum, ec);
+		ubi_err(ubi, "erase counter overflow at PEB %d, EC %d",
+			pnum, ec);
 		return -EINVAL;
 	}
 
@@ -736,7 +739,7 @@ struct ubi_ainf_peb *ubi_early_get_peb(struct ubi_device *ubi,
 		return aeb;
 	}
 
-	ubi_err("no free eraseblocks");
+	ubi_err(ubi, "no free eraseblocks");
 	return ERR_PTR(-ENOSPC);
 }
 
@@ -785,9 +788,9 @@ static int check_corruption(struct ubi_device *ubi, struct ubi_vid_hdr *vid_hdr,
 	if (ubi_check_pattern(ubi->peb_buf, 0xFF, ubi->leb_size))
 		goto out_unlock;
 
-	ubi_err("PEB %d contains corrupted VID header, and the data does not contain all 0xFF",
+	ubi_err(ubi, "PEB %d contains corrupted VID header, and the data does not contain all 0xFF",
 		pnum);
-	ubi_err("this may be a non-UBI PEB or a severe VID header corruption which requires manual inspection");
+	ubi_err(ubi, "this may be a non-UBI PEB or a severe VID header corruption which requires manual inspection");
 	ubi_dump_vid_hdr(vid_hdr);
 	pr_err("hexdump of PEB %d offset %d, length %d",
 	       pnum, ubi->leb_start, ubi->leb_size);
@@ -859,7 +862,8 @@ static int scan_peb(struct ubi_device *ubi, struct ubi_attach_info *ai,
 		bitflips = 1;
 		break;
 	default:
-		ubi_err("'ubi_io_read_ec_hdr()' returned unknown code %d", err);
+		ubi_err(ubi, "'ubi_io_read_ec_hdr()' returned unknown code %d",
+			err);
 		return -EINVAL;
 	}
 
@@ -868,7 +872,7 @@ static int scan_peb(struct ubi_device *ubi, struct ubi_attach_info *ai,
 
 		/* Make sure UBI version is OK */
 		if (ech->version != UBI_VERSION) {
-			ubi_err("this UBI version is %d, image version is %d",
+			ubi_err(ubi, "this UBI version is %d, image version is %d",
 				UBI_VERSION, (int)ech->version);
 			return -EINVAL;
 		}
@@ -882,7 +886,7 @@ static int scan_peb(struct ubi_device *ubi, struct ubi_attach_info *ai,
 			 * flash. Upgrade UBI and use 64-bit erase counters
 			 * internally.
 			 */
-			ubi_err("erase counter overflow, max is %d",
+			ubi_err(ubi, "erase counter overflow, max is %d",
 				UBI_MAX_ERASECOUNTER);
 			ubi_dump_ec_hdr(ech);
 			return -EINVAL;
@@ -903,7 +907,7 @@ static int scan_peb(struct ubi_device *ubi, struct ubi_attach_info *ai,
 		if (!ubi->image_seq)
 			ubi->image_seq = image_seq;
 		if (image_seq && ubi->image_seq != image_seq) {
-			ubi_err("bad image sequence number %d in PEB %d, expected %d",
+			ubi_err(ubi, "bad image sequence number %d in PEB %d, expected %d",
 				image_seq, pnum, ubi->image_seq);
 			ubi_dump_ec_hdr(ech);
 			return -EINVAL;
@@ -981,7 +985,7 @@ static int scan_peb(struct ubi_device *ubi, struct ubi_attach_info *ai,
 			return err;
 		goto adjust_mean_ec;
 	default:
-		ubi_err("'ubi_io_read_vid_hdr()' returned unknown code %d",
+		ubi_err(ubi, "'ubi_io_read_vid_hdr()' returned unknown code %d",
 			err);
 		return -EINVAL;
 	}
@@ -999,7 +1003,7 @@ static int scan_peb(struct ubi_device *ubi, struct ubi_attach_info *ai,
 		case UBI_COMPAT_DELETE:
 			if (vol_id != UBI_FM_SB_VOLUME_ID
 			    && vol_id != UBI_FM_DATA_VOLUME_ID) {
-				ubi_msg("\"delete\" compatible internal volume %d:%d found, will remove it",
+				ubi_msg(ubi, "\"delete\" compatible internal volume %d:%d found, will remove it",
 					vol_id, lnum);
 			}
 			err = add_to_list(ai, pnum, vol_id, lnum,
@@ -1009,13 +1013,13 @@ static int scan_peb(struct ubi_device *ubi, struct ubi_attach_info *ai,
 			return 0;
 
 		case UBI_COMPAT_RO:
-			ubi_msg("read-only compatible internal volume %d:%d found, switch to read-only mode",
+			ubi_msg(ubi, "read-only compatible internal volume %d:%d found, switch to read-only mode",
 				vol_id, lnum);
 			ubi->ro_mode = 1;
 			break;
 
 		case UBI_COMPAT_PRESERVE:
-			ubi_msg("\"preserve\" compatible internal volume %d:%d found",
+			ubi_msg(ubi, "\"preserve\" compatible internal volume %d:%d found",
 				vol_id, lnum);
 			err = add_to_list(ai, pnum, vol_id, lnum,
 					  ec, 0, &ai->alien);
@@ -1024,14 +1028,14 @@ static int scan_peb(struct ubi_device *ubi, struct ubi_attach_info *ai,
 			return 0;
 
 		case UBI_COMPAT_REJECT:
-			ubi_err("incompatible internal volume %d:%d found",
+			ubi_err(ubi, "incompatible internal volume %d:%d found",
 				vol_id, lnum);
 			return -EINVAL;
 		}
 	}
 
 	if (ec_err)
-		ubi_warn("valid VID header but corrupted EC header at PEB %d",
+		ubi_warn(ubi, "valid VID header but corrupted EC header at PEB %d",
 			 pnum);
 	err = ubi_add_to_av(ubi, ai, pnum, ec, vidh, bitflips);
 	if (err)
@@ -1075,7 +1079,7 @@ static int late_analysis(struct ubi_device *ubi, struct ubi_attach_info *ai)
 	 * with the flash HW or driver.
 	 */
 	if (ai->corr_peb_count) {
-		ubi_err("%d PEBs are corrupted and preserved",
+		ubi_err(ubi, "%d PEBs are corrupted and preserved",
 			ai->corr_peb_count);
 		pr_err("Corrupted PEBs are:");
 		list_for_each_entry(aeb, &ai->corr, u.list)
@@ -1087,7 +1091,7 @@ static int late_analysis(struct ubi_device *ubi, struct ubi_attach_info *ai)
 		 * otherwise, only print a warning.
 		 */
 		if (ai->corr_peb_count >= max_corr) {
-			ubi_err("too many corrupted PEBs, refusing");
+			ubi_err(ubi, "too many corrupted PEBs, refusing");
 			return -EINVAL;
 		}
 	}
@@ -1110,11 +1114,11 @@ static int late_analysis(struct ubi_device *ubi, struct ubi_attach_info *ai)
 		 */
 		if (ai->maybe_bad_peb_count <= 2) {
 			ai->is_empty = 1;
-			ubi_msg("empty MTD device detected");
+			ubi_msg(ubi, "empty MTD device detected");
 			get_random_bytes(&ubi->image_seq,
 					 sizeof(ubi->image_seq));
 		} else {
-			ubi_err("MTD device is not UBI-formatted and possibly contains non-UBI data - refusing it");
+			ubi_err(ubi, "MTD device is not UBI-formatted and possibly contains non-UBI data - refusing it");
 			return -EINVAL;
 		}
 
@@ -1248,7 +1252,7 @@ static int scan_all(struct ubi_device *ubi, struct ubi_attach_info *ai,
 			goto out_vidh;
 	}
 
-	ubi_msg("scanning is finished");
+	ubi_msg(ubi, "scanning is finished");
 
 	/* Calculate mean erase counter */
 	if (ai->ec_count)
@@ -1515,37 +1519,37 @@ static int self_check_ai(struct ubi_device *ubi, struct ubi_attach_info *ai)
 		vols_found += 1;
 
 		if (ai->is_empty) {
-			ubi_err("bad is_empty flag");
+			ubi_err(ubi, "bad is_empty flag");
 			goto bad_av;
 		}
 
 		if (av->vol_id < 0 || av->highest_lnum < 0 ||
 		    av->leb_count < 0 || av->vol_type < 0 || av->used_ebs < 0 ||
 		    av->data_pad < 0 || av->last_data_size < 0) {
-			ubi_err("negative values");
+			ubi_err(ubi, "negative values");
 			goto bad_av;
 		}
 
 		if (av->vol_id >= UBI_MAX_VOLUMES &&
 		    av->vol_id < UBI_INTERNAL_VOL_START) {
-			ubi_err("bad vol_id");
+			ubi_err(ubi, "bad vol_id");
 			goto bad_av;
 		}
 
 		if (av->vol_id > ai->highest_vol_id) {
-			ubi_err("highest_vol_id is %d, but vol_id %d is there",
+			ubi_err(ubi, "highest_vol_id is %d, but vol_id %d is there",
 				ai->highest_vol_id, av->vol_id);
 			goto out;
 		}
 
 		if (av->vol_type != UBI_DYNAMIC_VOLUME &&
 		    av->vol_type != UBI_STATIC_VOLUME) {
-			ubi_err("bad vol_type");
+			ubi_err(ubi, "bad vol_type");
 			goto bad_av;
 		}
 
 		if (av->data_pad > ubi->leb_size / 2) {
-			ubi_err("bad data_pad");
+			ubi_err(ubi, "bad data_pad");
 			goto bad_av;
 		}
 
@@ -1557,48 +1561,48 @@ static int self_check_ai(struct ubi_device *ubi, struct ubi_attach_info *ai)
 			leb_count += 1;
 
 			if (aeb->pnum < 0 || aeb->ec < 0) {
-				ubi_err("negative values");
+				ubi_err(ubi, "negative values");
 				goto bad_aeb;
 			}
 
 			if (aeb->ec < ai->min_ec) {
-				ubi_err("bad ai->min_ec (%d), %d found",
+				ubi_err(ubi, "bad ai->min_ec (%d), %d found",
 					ai->min_ec, aeb->ec);
 				goto bad_aeb;
 			}
 
 			if (aeb->ec > ai->max_ec) {
-				ubi_err("bad ai->max_ec (%d), %d found",
+				ubi_err(ubi, "bad ai->max_ec (%d), %d found",
 					ai->max_ec, aeb->ec);
 				goto bad_aeb;
 			}
 
 			if (aeb->pnum >= ubi->peb_count) {
-				ubi_err("too high PEB number %d, total PEBs %d",
+				ubi_err(ubi, "too high PEB number %d, total PEBs %d",
 					aeb->pnum, ubi->peb_count);
 				goto bad_aeb;
 			}
 
 			if (av->vol_type == UBI_STATIC_VOLUME) {
 				if (aeb->lnum >= av->used_ebs) {
-					ubi_err("bad lnum or used_ebs");
+					ubi_err(ubi, "bad lnum or used_ebs");
 					goto bad_aeb;
 				}
 			} else {
 				if (av->used_ebs != 0) {
-					ubi_err("non-zero used_ebs");
+					ubi_err(ubi, "non-zero used_ebs");
 					goto bad_aeb;
 				}
 			}
 
 			if (aeb->lnum > av->highest_lnum) {
-				ubi_err("incorrect highest_lnum or lnum");
+				ubi_err(ubi, "incorrect highest_lnum or lnum");
 				goto bad_aeb;
 			}
 		}
 
 		if (av->leb_count != leb_count) {
-			ubi_err("bad leb_count, %d objects in the tree",
+			ubi_err(ubi, "bad leb_count, %d objects in the tree",
 				leb_count);
 			goto bad_av;
 		}
@@ -1609,13 +1613,13 @@ static int self_check_ai(struct ubi_device *ubi, struct ubi_attach_info *ai)
 		aeb = last_aeb;
 
 		if (aeb->lnum != av->highest_lnum) {
-			ubi_err("bad highest_lnum");
+			ubi_err(ubi, "bad highest_lnum");
 			goto bad_aeb;
 		}
 	}
 
 	if (vols_found != ai->vols_found) {
-		ubi_err("bad ai->vols_found %d, should be %d",
+		ubi_err(ubi, "bad ai->vols_found %d, should be %d",
 			ai->vols_found, vols_found);
 		goto out;
 	}
@@ -1632,7 +1636,8 @@ static int self_check_ai(struct ubi_device *ubi, struct ubi_attach_info *ai)
 
 			err = ubi_io_read_vid_hdr(ubi, aeb->pnum, vidh, 1);
 			if (err && err != UBI_IO_BITFLIPS) {
-				ubi_err("VID header is not OK (%d)", err);
+				ubi_err(ubi, "VID header is not OK (%d)",
+					err);
 				if (err > 0)
 					err = -EIO;
 				return err;
@@ -1641,37 +1646,37 @@ static int self_check_ai(struct ubi_device *ubi, struct ubi_attach_info *ai)
 			vol_type = vidh->vol_type == UBI_VID_DYNAMIC ?
 				   UBI_DYNAMIC_VOLUME : UBI_STATIC_VOLUME;
 			if (av->vol_type != vol_type) {
-				ubi_err("bad vol_type");
+				ubi_err(ubi, "bad vol_type");
 				goto bad_vid_hdr;
 			}
 
 			if (aeb->sqnum != be64_to_cpu(vidh->sqnum)) {
-				ubi_err("bad sqnum %llu", aeb->sqnum);
+				ubi_err(ubi, "bad sqnum %llu", aeb->sqnum);
 				goto bad_vid_hdr;
 			}
 
 			if (av->vol_id != be32_to_cpu(vidh->vol_id)) {
-				ubi_err("bad vol_id %d", av->vol_id);
+				ubi_err(ubi, "bad vol_id %d", av->vol_id);
 				goto bad_vid_hdr;
 			}
 
 			if (av->compat != vidh->compat) {
-				ubi_err("bad compat %d", vidh->compat);
+				ubi_err(ubi, "bad compat %d", vidh->compat);
 				goto bad_vid_hdr;
 			}
 
 			if (aeb->lnum != be32_to_cpu(vidh->lnum)) {
-				ubi_err("bad lnum %d", aeb->lnum);
+				ubi_err(ubi, "bad lnum %d", aeb->lnum);
 				goto bad_vid_hdr;
 			}
 
 			if (av->used_ebs != be32_to_cpu(vidh->used_ebs)) {
-				ubi_err("bad used_ebs %d", av->used_ebs);
+				ubi_err(ubi, "bad used_ebs %d", av->used_ebs);
 				goto bad_vid_hdr;
 			}
 
 			if (av->data_pad != be32_to_cpu(vidh->data_pad)) {
-				ubi_err("bad data_pad %d", av->data_pad);
+				ubi_err(ubi, "bad data_pad %d", av->data_pad);
 				goto bad_vid_hdr;
 			}
 		}
@@ -1680,12 +1685,13 @@ static int self_check_ai(struct ubi_device *ubi, struct ubi_attach_info *ai)
 			continue;
 
 		if (av->highest_lnum != be32_to_cpu(vidh->lnum)) {
-			ubi_err("bad highest_lnum %d", av->highest_lnum);
+			ubi_err(ubi, "bad highest_lnum %d", av->highest_lnum);
 			goto bad_vid_hdr;
 		}
 
 		if (av->last_data_size != be32_to_cpu(vidh->data_size)) {
-			ubi_err("bad last_data_size %d", av->last_data_size);
+			ubi_err(ubi, "bad last_data_size %d",
+				av->last_data_size);
 			goto bad_vid_hdr;
 		}
 	}
@@ -1726,7 +1732,7 @@ static int self_check_ai(struct ubi_device *ubi, struct ubi_attach_info *ai)
 	err = 0;
 	for (pnum = 0; pnum < ubi->peb_count; pnum++)
 		if (!buf[pnum]) {
-			ubi_err("PEB %d is not referred", pnum);
+			ubi_err(ubi, "PEB %d is not referred", pnum);
 			err = 1;
 		}
 
@@ -1736,18 +1742,18 @@ static int self_check_ai(struct ubi_device *ubi, struct ubi_attach_info *ai)
 	return 0;
 
 bad_aeb:
-	ubi_err("bad attaching information about LEB %d", aeb->lnum);
+	ubi_err(ubi, "bad attaching information about LEB %d", aeb->lnum);
 	ubi_dump_aeb(aeb, 0);
 	ubi_dump_av(av);
 	goto out;
 
 bad_av:
-	ubi_err("bad attaching information about volume %d", av->vol_id);
+	ubi_err(ubi, "bad attaching information about volume %d", av->vol_id);
 	ubi_dump_av(av);
 	goto out;
 
 bad_vid_hdr:
-	ubi_err("bad attaching information about volume %d", av->vol_id);
+	ubi_err(ubi, "bad attaching information about volume %d", av->vol_id);
 	ubi_dump_av(av);
 	ubi_dump_vid_hdr(vidh);
 
diff --git a/drivers/mtd/ubi/block.c b/drivers/mtd/ubi/block.c
index 8876c7d3d712..6b6bce28bd63 100644
--- a/drivers/mtd/ubi/block.c
+++ b/drivers/mtd/ubi/block.c
@@ -111,13 +111,13 @@ static int __init ubiblock_set_param(const char *val,
 
 	len = strnlen(val, UBIBLOCK_PARAM_LEN);
 	if (len == 0) {
-		ubi_warn("block: empty 'block=' parameter - ignored\n");
+		pr_warn("UBI: block: empty 'block=' parameter - ignored\n");
 		return 0;
 	}
 
 	if (len == UBIBLOCK_PARAM_LEN) {
-		ubi_err("block: parameter \"%s\" is too long, max. is %d\n",
-			val, UBIBLOCK_PARAM_LEN);
+		pr_err("UBI: block: parameter \"%s\" is too long, max. is %d\n",
+		       val, UBIBLOCK_PARAM_LEN);
 		return -EINVAL;
 	}
 
@@ -188,9 +188,8 @@ static int ubiblock_read_to_buf(struct ubiblock *dev, char *buffer,
 
 	ret = ubi_read(dev->desc, leb, buffer, offset, len);
 	if (ret) {
-		ubi_err("%s: error %d while reading from LEB %d (offset %d, "
-		        "length %d)", dev->gd->disk_name, ret, leb, offset,
-			len);
+		dev_err(disk_to_dev(dev->gd), "%d while reading from LEB %d (offset %d, length %d)",
+			ret, leb, offset, len);
 		return ret;
 	}
 	return 0;
@@ -328,8 +327,8 @@ static int ubiblock_open(struct block_device *bdev, fmode_t mode)
 
 	dev->desc = ubi_open_volume(dev->ubi_num, dev->vol_id, UBI_READONLY);
 	if (IS_ERR(dev->desc)) {
-		ubi_err("%s failed to open ubi volume %d_%d",
-			dev->gd->disk_name, dev->ubi_num, dev->vol_id);
+		dev_err(disk_to_dev(dev->gd), "failed to open ubi volume %d_%d",
+			dev->ubi_num, dev->vol_id);
 		ret = PTR_ERR(dev->desc);
 		dev->desc = NULL;
 		goto out_unlock;
@@ -405,7 +404,7 @@ int ubiblock_create(struct ubi_volume_info *vi)
 	/* Initialize the gendisk of this ubiblock device */
 	gd = alloc_disk(1);
 	if (!gd) {
-		ubi_err("block: alloc_disk failed");
+		pr_err("UBI: block: alloc_disk failed");
 		ret = -ENODEV;
 		goto out_free_dev;
 	}
@@ -421,7 +420,7 @@ int ubiblock_create(struct ubi_volume_info *vi)
 	spin_lock_init(&dev->queue_lock);
 	dev->rq = blk_init_queue(ubiblock_request, &dev->queue_lock);
 	if (!dev->rq) {
-		ubi_err("block: blk_init_queue failed");
+		dev_err(disk_to_dev(gd), "blk_init_queue failed");
 		ret = -ENODEV;
 		goto out_put_disk;
 	}
@@ -446,8 +445,8 @@ int ubiblock_create(struct ubi_volume_info *vi)
 
 	/* Must be the last step: anyone can call file ops from now on */
 	add_disk(dev->gd);
-	ubi_msg("%s created from ubi%d:%d(%s)",
-		dev->gd->disk_name, dev->ubi_num, dev->vol_id, vi->name);
+	dev_info(disk_to_dev(dev->gd), "created from ubi%d:%d(%s)",
+		 dev->ubi_num, dev->vol_id, vi->name);
 	return 0;
 
 out_free_queue:
@@ -464,7 +463,7 @@ static void ubiblock_cleanup(struct ubiblock *dev)
 {
 	del_gendisk(dev->gd);
 	blk_cleanup_queue(dev->rq);
-	ubi_msg("%s released", dev->gd->disk_name);
+	dev_info(disk_to_dev(dev->gd), "released");
 	put_disk(dev->gd);
 }
 
@@ -518,8 +517,8 @@ static int ubiblock_resize(struct ubi_volume_info *vi)
 	}
 	if ((sector_t)disk_capacity != disk_capacity) {
 		mutex_unlock(&devices_mutex);
-		ubi_warn("%s: the volume is too big (%d LEBs), cannot resize",
-			 dev->gd->disk_name, vi->size);
+		dev_warn(disk_to_dev(dev->gd), "the volume is too big (%d LEBs), cannot resize",
+			 vi->size);
 		return -EFBIG;
 	}
 
@@ -527,8 +526,8 @@ static int ubiblock_resize(struct ubi_volume_info *vi)
 
 	if (get_capacity(dev->gd) != disk_capacity) {
 		set_capacity(dev->gd, disk_capacity);
-		ubi_msg("%s resized to %lld bytes", dev->gd->disk_name,
-			vi->used_bytes);
+		dev_info(disk_to_dev(dev->gd), "resized to %lld bytes",
+			 vi->used_bytes);
 	}
 	mutex_unlock(&dev->dev_mutex);
 	mutex_unlock(&devices_mutex);
@@ -596,8 +595,8 @@ static int __init ubiblock_create_from_param(void)
 
 		desc = open_volume_desc(p->name, p->ubi_num, p->vol_id);
 		if (IS_ERR(desc)) {
-			ubi_err("block: can't open volume, err=%ld\n",
-				PTR_ERR(desc));
+			pr_err("UBI: block: can't open volume, err=%ld\n",
+			       PTR_ERR(desc));
 			ret = PTR_ERR(desc);
 			break;
 		}
@@ -607,8 +606,8 @@ static int __init ubiblock_create_from_param(void)
 
 		ret = ubiblock_create(&vi);
 		if (ret) {
-			ubi_err("block: can't add '%s' volume, err=%d\n",
-				vi.name, ret);
+			pr_err("UBI: block: can't add '%s' volume, err=%d\n",
+			       vi.name, ret);
 			break;
 		}
 	}
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 6e30a3c280d0..3405be46ebe9 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -166,7 +166,7 @@ int ubi_volume_notify(struct ubi_device *ubi, struct ubi_volume *vol, int ntype)
 	case UBI_VOLUME_RESIZED:
 	case UBI_VOLUME_RENAMED:
 		if (ubi_update_fastmap(ubi)) {
-			ubi_err("Unable to update fastmap!");
+			ubi_err(ubi, "Unable to update fastmap!");
 			ubi_ro_mode(ubi);
 		}
 	}
@@ -517,7 +517,7 @@ static int uif_init(struct ubi_device *ubi, int *ref)
 	 */
 	err = alloc_chrdev_region(&dev, 0, ubi->vtbl_slots + 1, ubi->ubi_name);
 	if (err) {
-		ubi_err("cannot register UBI character devices");
+		ubi_err(ubi, "cannot register UBI character devices");
 		return err;
 	}
 
@@ -528,7 +528,7 @@ static int uif_init(struct ubi_device *ubi, int *ref)
 
 	err = cdev_add(&ubi->cdev, dev, 1);
 	if (err) {
-		ubi_err("cannot add character device");
+		ubi_err(ubi, "cannot add character device");
 		goto out_unreg;
 	}
 
@@ -540,7 +540,7 @@ static int uif_init(struct ubi_device *ubi, int *ref)
 		if (ubi->volumes[i]) {
 			err = ubi_add_volume(ubi, ubi->volumes[i]);
 			if (err) {
-				ubi_err("cannot add volume %d", i);
+				ubi_err(ubi, "cannot add volume %d", i);
 				goto out_volumes;
 			}
 		}
@@ -556,7 +556,8 @@ out_sysfs:
 	cdev_del(&ubi->cdev);
 out_unreg:
 	unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1);
-	ubi_err("cannot initialize UBI %s, error %d", ubi->ubi_name, err);
+	ubi_err(ubi, "cannot initialize UBI %s, error %d",
+		ubi->ubi_name, err);
 	return err;
 }
 
@@ -650,7 +651,7 @@ static int io_init(struct ubi_device *ubi, int max_beb_per1024)
 		 * guess we should just pick the largest region. But this is
 		 * not implemented.
 		 */
-		ubi_err("multiple regions, not implemented");
+		ubi_err(ubi, "multiple regions, not implemented");
 		return -EINVAL;
 	}
 
@@ -685,7 +686,7 @@ static int io_init(struct ubi_device *ubi, int max_beb_per1024)
 	 * which allows us to avoid costly division operations.
 	 */
 	if (!is_power_of_2(ubi->min_io_size)) {
-		ubi_err("min. I/O unit (%d) is not power of 2",
+		ubi_err(ubi, "min. I/O unit (%d) is not power of 2",
 			ubi->min_io_size);
 		return -EINVAL;
 	}
@@ -702,7 +703,7 @@ static int io_init(struct ubi_device *ubi, int max_beb_per1024)
 	if (ubi->max_write_size < ubi->min_io_size ||
 	    ubi->max_write_size % ubi->min_io_size ||
 	    !is_power_of_2(ubi->max_write_size)) {
-		ubi_err("bad write buffer size %d for %d min. I/O unit",
+		ubi_err(ubi, "bad write buffer size %d for %d min. I/O unit",
 			ubi->max_write_size, ubi->min_io_size);
 		return -EINVAL;
 	}
@@ -739,7 +740,7 @@ static int io_init(struct ubi_device *ubi, int max_beb_per1024)
 
 	/* The shift must be aligned to 32-bit boundary */
 	if (ubi->vid_hdr_shift % 4) {
-		ubi_err("unaligned VID header shift %d",
+		ubi_err(ubi, "unaligned VID header shift %d",
 			ubi->vid_hdr_shift);
 		return -EINVAL;
 	}
@@ -749,7 +750,7 @@ static int io_init(struct ubi_device *ubi, int max_beb_per1024)
 	    ubi->leb_start < ubi->vid_hdr_offset + UBI_VID_HDR_SIZE ||
 	    ubi->leb_start > ubi->peb_size - UBI_VID_HDR_SIZE ||
 	    ubi->leb_start & (ubi->min_io_size - 1)) {
-		ubi_err("bad VID header (%d) or data offsets (%d)",
+		ubi_err(ubi, "bad VID header (%d) or data offsets (%d)",
 			ubi->vid_hdr_offset, ubi->leb_start);
 		return -EINVAL;
 	}
@@ -769,14 +770,14 @@ static int io_init(struct ubi_device *ubi, int max_beb_per1024)
 	 * read-only mode.
 	 */
 	if (ubi->vid_hdr_offset + UBI_VID_HDR_SIZE <= ubi->hdrs_min_io_size) {
-		ubi_warn("EC and VID headers are in the same minimal I/O unit, switch to read-only mode");
+		ubi_warn(ubi, "EC and VID headers are in the same minimal I/O unit, switch to read-only mode");
 		ubi->ro_mode = 1;
 	}
 
 	ubi->leb_size = ubi->peb_size - ubi->leb_start;
 
 	if (!(ubi->mtd->flags & MTD_WRITEABLE)) {
-		ubi_msg("MTD device %d is write-protected, attach in read-only mode",
+		ubi_msg(ubi, "MTD device %d is write-protected, attach in read-only mode",
 			ubi->mtd->index);
 		ubi->ro_mode = 1;
 	}
@@ -809,7 +810,7 @@ static int autoresize(struct ubi_device *ubi, int vol_id)
 	int err, old_reserved_pebs = vol->reserved_pebs;
 
 	if (ubi->ro_mode) {
-		ubi_warn("skip auto-resize because of R/O mode");
+		ubi_warn(ubi, "skip auto-resize because of R/O mode");
 		return 0;
 	}
 
@@ -830,21 +831,22 @@ static int autoresize(struct ubi_device *ubi, int vol_id)
 		vtbl_rec = ubi->vtbl[vol_id];
 		err = ubi_change_vtbl_record(ubi, vol_id, &vtbl_rec);
 		if (err)
-			ubi_err("cannot clean auto-resize flag for volume %d",
+			ubi_err(ubi, "cannot clean auto-resize flag for volume %d",
 				vol_id);
 	} else {
 		desc.vol = vol;
 		err = ubi_resize_volume(&desc,
 					old_reserved_pebs + ubi->avail_pebs);
 		if (err)
-			ubi_err("cannot auto-resize volume %d", vol_id);
+			ubi_err(ubi, "cannot auto-resize volume %d",
+				vol_id);
 	}
 
 	if (err)
 		return err;
 
-	ubi_msg("volume %d (\"%s\") re-sized from %d to %d LEBs", vol_id,
-		vol->name, old_reserved_pebs, vol->reserved_pebs);
+	ubi_msg(ubi, "volume %d (\"%s\") re-sized from %d to %d LEBs",
+		vol_id, vol->name, old_reserved_pebs, vol->reserved_pebs);
 	return 0;
 }
 
@@ -885,7 +887,7 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
 	for (i = 0; i < UBI_MAX_DEVICES; i++) {
 		ubi = ubi_devices[i];
 		if (ubi && mtd->index == ubi->mtd->index) {
-			ubi_err("mtd%d is already attached to ubi%d",
+			ubi_err(ubi, "mtd%d is already attached to ubi%d",
 				mtd->index, i);
 			return -EEXIST;
 		}
@@ -900,7 +902,7 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
 	 * no sense to attach emulated MTD devices, so we prohibit this.
 	 */
 	if (mtd->type == MTD_UBIVOLUME) {
-		ubi_err("refuse attaching mtd%d - it is already emulated on top of UBI",
+		ubi_err(ubi, "refuse attaching mtd%d - it is already emulated on top of UBI",
 			mtd->index);
 		return -EINVAL;
 	}
@@ -911,7 +913,7 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
 			if (!ubi_devices[ubi_num])
 				break;
 		if (ubi_num == UBI_MAX_DEVICES) {
-			ubi_err("only %d UBI devices may be created",
+			ubi_err(ubi, "only %d UBI devices may be created",
 				UBI_MAX_DEVICES);
 			return -ENFILE;
 		}
@@ -921,7 +923,7 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
 
 		/* Make sure ubi_num is not busy */
 		if (ubi_devices[ubi_num]) {
-			ubi_err("ubi%d already exists", ubi_num);
+			ubi_err(ubi, "ubi%d already exists", ubi_num);
 			return -EEXIST;
 		}
 	}
@@ -953,13 +955,14 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
 
 	if (!ubi->fm_disabled && (int)mtd_div_by_eb(ubi->mtd->size, ubi->mtd)
 	    <= UBI_FM_MAX_START) {
-		ubi_err("More than %i PEBs are needed for fastmap, sorry.",
+		ubi_err(ubi, "More than %i PEBs are needed for fastmap, sorry.",
 			UBI_FM_MAX_START);
 		ubi->fm_disabled = 1;
 	}
 
-	ubi_msg("default fastmap pool size: %d", ubi->fm_pool.max_size);
-	ubi_msg("default fastmap WL pool size: %d", ubi->fm_wl_pool.max_size);
+	ubi_msg(ubi, "default fastmap pool size: %d", ubi->fm_pool.max_size);
+	ubi_msg(ubi, "default fastmap WL pool size: %d",
+		ubi->fm_wl_pool.max_size);
 #else
 	ubi->fm_disabled = 1;
 #endif
@@ -970,7 +973,7 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
 	mutex_init(&ubi->fm_mutex);
 	init_rwsem(&ubi->fm_sem);
 
-	ubi_msg("attaching mtd%d to ubi%d", mtd->index, ubi_num);
+	ubi_msg(ubi, "attaching mtd%d to ubi%d", mtd->index, ubi_num);
 
 	err = io_init(ubi, max_beb_per1024);
 	if (err)
@@ -989,7 +992,8 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
 #endif
 	err = ubi_attach(ubi, 0);
 	if (err) {
-		ubi_err("failed to attach mtd%d, error %d", mtd->index, err);
+		ubi_err(ubi, "failed to attach mtd%d, error %d",
+			mtd->index, err);
 		goto out_free;
 	}
 
@@ -1010,28 +1014,28 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
 	ubi->bgt_thread = kthread_create(ubi_thread, ubi, "%s", ubi->bgt_name);
 	if (IS_ERR(ubi->bgt_thread)) {
 		err = PTR_ERR(ubi->bgt_thread);
-		ubi_err("cannot spawn \"%s\", error %d", ubi->bgt_name,
-			err);
+		ubi_err(ubi, "cannot spawn \"%s\", error %d",
+			ubi->bgt_name, err);
 		goto out_debugfs;
 	}
 
-	ubi_msg("attached mtd%d (name \"%s\", size %llu MiB) to ubi%d",
-		mtd->index, mtd->name, ubi->flash_size >> 20, ubi_num);
-	ubi_msg("PEB size: %d bytes (%d KiB), LEB size: %d bytes",
+	ubi_msg(ubi, "attached mtd%d (name \"%s\", size %llu MiB)",
+		mtd->index, mtd->name, ubi->flash_size >> 20);
+	ubi_msg(ubi, "PEB size: %d bytes (%d KiB), LEB size: %d bytes",
 		ubi->peb_size, ubi->peb_size >> 10, ubi->leb_size);
-	ubi_msg("min./max. I/O unit sizes: %d/%d, sub-page size %d",
+	ubi_msg(ubi, "min./max. I/O unit sizes: %d/%d, sub-page size %d",
 		ubi->min_io_size, ubi->max_write_size, ubi->hdrs_min_io_size);
-	ubi_msg("VID header offset: %d (aligned %d), data offset: %d",
+	ubi_msg(ubi, "VID header offset: %d (aligned %d), data offset: %d",
 		ubi->vid_hdr_offset, ubi->vid_hdr_aloffset, ubi->leb_start);
-	ubi_msg("good PEBs: %d, bad PEBs: %d, corrupted PEBs: %d",
+	ubi_msg(ubi, "good PEBs: %d, bad PEBs: %d, corrupted PEBs: %d",
 		ubi->good_peb_count, ubi->bad_peb_count, ubi->corr_peb_count);
-	ubi_msg("user volume: %d, internal volumes: %d, max. volumes count: %d",
+	ubi_msg(ubi, "user volume: %d, internal volumes: %d, max. volumes count: %d",
 		ubi->vol_count - UBI_INT_VOL_COUNT, UBI_INT_VOL_COUNT,
 		ubi->vtbl_slots);
-	ubi_msg("max/mean erase counter: %d/%d, WL threshold: %d, image sequence number: %u",
+	ubi_msg(ubi, "max/mean erase counter: %d/%d, WL threshold: %d, image sequence number: %u",
 		ubi->max_ec, ubi->mean_ec, CONFIG_MTD_UBI_WL_THRESHOLD,
 		ubi->image_seq);
-	ubi_msg("available PEBs: %d, total reserved PEBs: %d, PEBs reserved for bad PEB handling: %d",
+	ubi_msg(ubi, "available PEBs: %d, total reserved PEBs: %d, PEBs reserved for bad PEB handling: %d",
 		ubi->avail_pebs, ubi->rsvd_pebs, ubi->beb_rsvd_pebs);
 
 	/*
@@ -1100,7 +1104,7 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
 			return -EBUSY;
 		}
 		/* This may only happen if there is a bug */
-		ubi_err("%s reference count %d, destroy anyway",
+		ubi_err(ubi, "%s reference count %d, destroy anyway",
 			ubi->ubi_name, ubi->ref_count);
 	}
 	ubi_devices[ubi_num] = NULL;
@@ -1108,7 +1112,7 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
 
 	ubi_assert(ubi_num == ubi->ubi_num);
 	ubi_notify_all(ubi, UBI_VOLUME_REMOVED, NULL);
-	ubi_msg("detaching mtd%d from ubi%d", ubi->mtd->index, ubi_num);
+	ubi_msg(ubi, "detaching mtd%d", ubi->mtd->index);
 #ifdef CONFIG_MTD_UBI_FASTMAP
 	/* If we don't write a new fastmap at detach time we lose all
 	 * EC updates that have been made since the last written fastmap. */
@@ -1136,7 +1140,7 @@ int ubi_detach_mtd_dev(int ubi_num, int anyway)
 	put_mtd_device(ubi->mtd);
 	vfree(ubi->peb_buf);
 	vfree(ubi->fm_buf);
-	ubi_msg("mtd%d is detached from ubi%d", ubi->mtd->index, ubi->ubi_num);
+	ubi_msg(ubi, "mtd%d is detached", ubi->mtd->index);
 	put_device(&ubi->dev);
 	return 0;
 }
@@ -1218,7 +1222,8 @@ static int __init ubi_init(void)
 	BUILD_BUG_ON(sizeof(struct ubi_vid_hdr) != 64);
 
 	if (mtd_devs > UBI_MAX_DEVICES) {
-		ubi_err("too many MTD devices, maximum is %d", UBI_MAX_DEVICES);
+		pr_err("UBI error: too many MTD devices, maximum is %d",
+		       UBI_MAX_DEVICES);
 		return -EINVAL;
 	}
 
@@ -1226,19 +1231,19 @@ static int __init ubi_init(void)
 	ubi_class = class_create(THIS_MODULE, UBI_NAME_STR);
 	if (IS_ERR(ubi_class)) {
 		err = PTR_ERR(ubi_class);
-		ubi_err("cannot create UBI class");
+		pr_err("UBI error: cannot create UBI class");
 		goto out;
 	}
 
 	err = class_create_file(ubi_class, &ubi_version);
 	if (err) {
-		ubi_err("cannot create sysfs file");
+		pr_err("UBI error: cannot create sysfs file");
 		goto out_class;
 	}
 
 	err = misc_register(&ubi_ctrl_cdev);
 	if (err) {
-		ubi_err("cannot register device");
+		pr_err("UBI error: cannot register device");
 		goto out_version;
 	}
 
@@ -1265,7 +1270,8 @@ static int __init ubi_init(void)
 		mtd = open_mtd_device(p->name);
 		if (IS_ERR(mtd)) {
 			err = PTR_ERR(mtd);
-			ubi_err("cannot open mtd %s, error %d", p->name, err);
+			pr_err("UBI error: cannot open mtd %s, error %d",
+			       p->name, err);
 			/* See comment below re-ubi_is_module(). */
 			if (ubi_is_module())
 				goto out_detach;
@@ -1277,7 +1283,8 @@ static int __init ubi_init(void)
 					 p->vid_hdr_offs, p->max_beb_per1024);
 		mutex_unlock(&ubi_devices_mutex);
 		if (err < 0) {
-			ubi_err("cannot attach mtd%d", mtd->index);
+			pr_err("UBI error: cannot attach mtd%d",
+			       mtd->index);
 			put_mtd_device(mtd);
 
 			/*
@@ -1300,7 +1307,7 @@ static int __init ubi_init(void)
 
 	err = ubiblock_init();
 	if (err) {
-		ubi_err("block: cannot initialize, error %d", err);
+		pr_err("UBI error: block: cannot initialize, error %d", err);
 
 		/* See comment above re-ubi_is_module(). */
 		if (ubi_is_module())
@@ -1326,7 +1333,7 @@ out_version:
 out_class:
 	class_destroy(ubi_class);
 out:
-	ubi_err("cannot initialize UBI, error %d", err);
+	pr_err("UBI error: cannot initialize UBI, error %d", err);
 	return err;
 }
 late_initcall(ubi_init);
@@ -1365,7 +1372,7 @@ static int __init bytes_str_to_int(const char *str)
 
 	result = simple_strtoul(str, &endp, 0);
 	if (str == endp || result >= INT_MAX) {
-		ubi_err("incorrect bytes count: \"%s\"\n", str);
+		pr_err("UBI error: incorrect bytes count: \"%s\"\n", str);
 		return -EINVAL;
 	}
 
@@ -1381,7 +1388,7 @@ static int __init bytes_str_to_int(const char *str)
 	case '\0':
 		break;
 	default:
-		ubi_err("incorrect bytes count: \"%s\"\n", str);
+		pr_err("UBI error: incorrect bytes count: \"%s\"\n", str);
 		return -EINVAL;
 	}
 
@@ -1408,20 +1415,20 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
 		return -EINVAL;
 
 	if (mtd_devs == UBI_MAX_DEVICES) {
-		ubi_err("too many parameters, max. is %d\n",
-			UBI_MAX_DEVICES);
+		pr_err("UBI error: too many parameters, max. is %d\n",
+		       UBI_MAX_DEVICES);
 		return -EINVAL;
 	}
 
 	len = strnlen(val, MTD_PARAM_LEN_MAX);
 	if (len == MTD_PARAM_LEN_MAX) {
-		ubi_err("parameter \"%s\" is too long, max. is %d\n",
-			val, MTD_PARAM_LEN_MAX);
+		pr_err("UBI error: parameter \"%s\" is too long, max. is %d\n",
+		       val, MTD_PARAM_LEN_MAX);
 		return -EINVAL;
 	}
 
 	if (len == 0) {
-		pr_warn("UBI warning: empty 'mtd=' parameter - ignored\n");
+		pr_err("UBI warning: empty 'mtd=' parameter - ignored\n");
 		return 0;
 	}
 
@@ -1435,7 +1442,7 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
 		tokens[i] = strsep(&pbuf, ",");
 
 	if (pbuf) {
-		ubi_err("too many arguments at \"%s\"\n", val);
+		pr_err("UBI error: too many arguments at \"%s\"\n", val);
 		return -EINVAL;
 	}
 
@@ -1455,8 +1462,8 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
 		int err = kstrtoint(token, 10, &p->max_beb_per1024);
 
 		if (err) {
-			ubi_err("bad value for max_beb_per1024 parameter: %s",
-				token);
+			pr_err("UBI error: bad value for max_beb_per1024 parameter: %s",
+			       token);
 			return -EINVAL;
 		}
 	}
@@ -1466,7 +1473,8 @@ static int __init ubi_mtd_param_parse(const char *val, struct kernel_param *kp)
 		int err = kstrtoint(token, 10, &p->ubi_num);
 
 		if (err) {
-			ubi_err("bad value for ubi_num parameter: %s", token);
+			pr_err("UBI error: bad value for ubi_num parameter: %s",
+			       token);
 			return -EINVAL;
 		}
 	} else
diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index 59de69a24e40..3410ea8109f8 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -48,13 +48,14 @@
 
 /**
  * get_exclusive - get exclusive access to an UBI volume.
+ * @ubi: UBI device description object
  * @desc: volume descriptor
  *
  * This function changes UBI volume open mode to "exclusive". Returns previous
  * mode value (positive integer) in case of success and a negative error code
  * in case of failure.
  */
-static int get_exclusive(struct ubi_volume_desc *desc)
+static int get_exclusive(struct ubi_device *ubi, struct ubi_volume_desc *desc)
 {
 	int users, err;
 	struct ubi_volume *vol = desc->vol;
@@ -63,7 +64,7 @@ static int get_exclusive(struct ubi_volume_desc *desc)
 	users = vol->readers + vol->writers + vol->exclusive;
 	ubi_assert(users > 0);
 	if (users > 1) {
-		ubi_err("%d users for volume %d", users, vol->vol_id);
+		ubi_err(ubi, "%d users for volume %d", users, vol->vol_id);
 		err = -EBUSY;
 	} else {
 		vol->readers = vol->writers = 0;
@@ -134,7 +135,7 @@ static int vol_cdev_release(struct inode *inode, struct file *file)
 		vol->ubi->ubi_num, vol->vol_id, desc->mode);
 
 	if (vol->updating) {
-		ubi_warn("update of volume %d not finished, volume is damaged",
+		ubi_warn(vol->ubi, "update of volume %d not finished, volume is damaged",
 			 vol->vol_id);
 		ubi_assert(!vol->changing_leb);
 		vol->updating = 0;
@@ -158,7 +159,7 @@ static loff_t vol_cdev_llseek(struct file *file, loff_t offset, int origin)
 
 	if (vol->updating) {
 		/* Update is in progress, seeking is prohibited */
-		ubi_err("updating");
+		ubi_err(vol->ubi, "updating");
 		return -EBUSY;
 	}
 
@@ -193,11 +194,11 @@ static ssize_t vol_cdev_read(struct file *file, __user char *buf, size_t count,
 		count, *offp, vol->vol_id);
 
 	if (vol->updating) {
-		ubi_err("updating");
+		ubi_err(vol->ubi, "updating");
 		return -EBUSY;
 	}
 	if (vol->upd_marker) {
-		ubi_err("damaged volume, update marker is set");
+		ubi_err(vol->ubi, "damaged volume, update marker is set");
 		return -EBADF;
 	}
 	if (*offp == vol->used_bytes || count == 0)
@@ -277,7 +278,7 @@ static ssize_t vol_cdev_direct_write(struct file *file, const char __user *buf,
 
 	lnum = div_u64_rem(*offp, vol->usable_leb_size, &off);
 	if (off & (ubi->min_io_size - 1)) {
-		ubi_err("unaligned position");
+		ubi_err(ubi, "unaligned position");
 		return -EINVAL;
 	}
 
@@ -286,7 +287,7 @@ static ssize_t vol_cdev_direct_write(struct file *file, const char __user *buf,
 
 	/* We can write only in fractions of the minimum I/O unit */
 	if (count & (ubi->min_io_size - 1)) {
-		ubi_err("unaligned write length");
+		ubi_err(ubi, "unaligned write length");
 		return -EINVAL;
 	}
 
@@ -348,7 +349,7 @@ static ssize_t vol_cdev_write(struct file *file, const char __user *buf,
 		err = ubi_more_leb_change_data(ubi, vol, buf, count);
 
 	if (err < 0) {
-		ubi_err("cannot accept more %zd bytes of data, error %d",
+		ubi_err(ubi, "cannot accept more %zd bytes of data, error %d",
 			count, err);
 		return err;
 	}
@@ -370,7 +371,7 @@ static ssize_t vol_cdev_write(struct file *file, const char __user *buf,
 			return err;
 
 		if (err) {
-			ubi_warn("volume %d on UBI device %d is corrupted",
+			ubi_warn(ubi, "volume %d on UBI device %d is corrupted",
 				 vol->vol_id, ubi->ubi_num);
 			vol->corrupted = 1;
 		}
@@ -420,7 +421,7 @@ static long vol_cdev_ioctl(struct file *file, unsigned int cmd,
 			break;
 		}
 
-		err = get_exclusive(desc);
+		err = get_exclusive(ubi, desc);
 		if (err < 0)
 			break;
 
@@ -456,7 +457,7 @@ static long vol_cdev_ioctl(struct file *file, unsigned int cmd,
 		    req.bytes < 0 || req.lnum >= vol->usable_leb_size)
 			break;
 
-		err = get_exclusive(desc);
+		err = get_exclusive(ubi, desc);
 		if (err < 0)
 			break;
 
@@ -642,7 +643,7 @@ static int verify_mkvol_req(const struct ubi_device *ubi,
 	return 0;
 
 bad:
-	ubi_err("bad volume creation request");
+	ubi_err(ubi, "bad volume creation request");
 	ubi_dump_mkvol_req(req);
 	return err;
 }
@@ -708,12 +709,12 @@ static int rename_volumes(struct ubi_device *ubi,
 	for (i = 0; i < req->count - 1; i++) {
 		for (n = i + 1; n < req->count; n++) {
 			if (req->ents[i].vol_id == req->ents[n].vol_id) {
-				ubi_err("duplicated volume id %d",
+				ubi_err(ubi, "duplicated volume id %d",
 					req->ents[i].vol_id);
 				return -EINVAL;
 			}
 			if (!strcmp(req->ents[i].name, req->ents[n].name)) {
-				ubi_err("duplicated volume name \"%s\"",
+				ubi_err(ubi, "duplicated volume name \"%s\"",
 					req->ents[i].name);
 				return -EINVAL;
 			}
@@ -736,7 +737,8 @@ static int rename_volumes(struct ubi_device *ubi,
 		re->desc = ubi_open_volume(ubi->ubi_num, vol_id, UBI_READWRITE);
 		if (IS_ERR(re->desc)) {
 			err = PTR_ERR(re->desc);
-			ubi_err("cannot open volume %d, error %d", vol_id, err);
+			ubi_err(ubi, "cannot open volume %d, error %d",
+				vol_id, err);
 			kfree(re);
 			goto out_free;
 		}
@@ -795,7 +797,7 @@ static int rename_volumes(struct ubi_device *ubi,
 				continue;
 
 			/* The volume exists but busy, or an error occurred */
-			ubi_err("cannot open volume \"%s\", error %d",
+			ubi_err(ubi, "cannot open volume \"%s\", error %d",
 				re->new_name, err);
 			goto out_free;
 		}
diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
index 63cb1d7236ce..7335c9ff9d99 100644
--- a/drivers/mtd/ubi/debug.c
+++ b/drivers/mtd/ubi/debug.c
@@ -43,12 +43,12 @@ void ubi_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len)
 		return;
 	err = mtd_read(ubi->mtd, addr, len, &read, buf);
 	if (err && err != -EUCLEAN) {
-		ubi_err("error %d while reading %d bytes from PEB %d:%d, read %zd bytes",
+		ubi_err(ubi, "err %d while reading %d bytes from PEB %d:%d, read %zd bytes",
 			err, len, pnum, offset, read);
 		goto out;
 	}
 
-	ubi_msg("dumping %d bytes of data from PEB %d, offset %d",
+	ubi_msg(ubi, "dumping %d bytes of data from PEB %d, offset %d",
 		len, pnum, offset);
 	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, buf, len, 1);
 out:
@@ -238,8 +238,8 @@ int ubi_debugfs_init(void)
 	if (IS_ERR_OR_NULL(dfs_rootdir)) {
 		int err = dfs_rootdir ? -ENODEV : PTR_ERR(dfs_rootdir);
 
-		ubi_err("cannot create \"ubi\" debugfs directory, error %d\n",
-			err);
+		pr_err("UBI error: cannot create \"ubi\" debugfs directory, error %d\n",
+		       err);
 		return err;
 	}
 
@@ -433,7 +433,7 @@ out_remove:
 	debugfs_remove_recursive(d->dfs_dir);
 out:
 	err = dent ? PTR_ERR(dent) : -ENODEV;
-	ubi_err("cannot create \"%s\" debugfs file or directory, error %d\n",
+	ubi_err(ubi, "cannot create \"%s\" debugfs file or directory, error %d\n",
 		fname, err);
 	return err;
 }
diff --git a/drivers/mtd/ubi/eba.c b/drivers/mtd/ubi/eba.c
index 2402d3b50171..a40020cf0923 100644
--- a/drivers/mtd/ubi/eba.c
+++ b/drivers/mtd/ubi/eba.c
@@ -422,7 +422,7 @@ retry:
 				 */
 				if (err == UBI_IO_BAD_HDR_EBADMSG ||
 				    err == UBI_IO_BAD_HDR) {
-					ubi_warn("corrupted VID header at PEB %d, LEB %d:%d",
+					ubi_warn(ubi, "corrupted VID header at PEB %d, LEB %d:%d",
 						 pnum, vol_id, lnum);
 					err = -EBADMSG;
 				} else
@@ -448,7 +448,7 @@ retry:
 				goto out_unlock;
 			scrub = 1;
 			if (!check) {
-				ubi_msg("force data checking");
+				ubi_msg(ubi, "force data checking");
 				check = 1;
 				goto retry;
 			}
@@ -459,7 +459,7 @@ retry:
 	if (check) {
 		uint32_t crc1 = crc32(UBI_CRC32_INIT, buf, len);
 		if (crc1 != crc) {
-			ubi_warn("CRC error: calculated %#08x, must be %#08x",
+			ubi_warn(ubi, "CRC error: calculated %#08x, must be %#08x",
 				 crc1, crc);
 			err = -EBADMSG;
 			goto out_unlock;
@@ -513,7 +513,8 @@ retry:
 		return new_pnum;
 	}
 
-	ubi_msg("recover PEB %d, move data to PEB %d", pnum, new_pnum);
+	ubi_msg(ubi, "recover PEB %d, move data to PEB %d",
+		pnum, new_pnum);
 
 	err = ubi_io_read_vid_hdr(ubi, pnum, vid_hdr, 1);
 	if (err && err != UBI_IO_BITFLIPS) {
@@ -554,7 +555,7 @@ retry:
 	up_read(&ubi->fm_sem);
 	ubi_wl_put_peb(ubi, vol_id, lnum, pnum, 1);
 
-	ubi_msg("data was successfully recovered");
+	ubi_msg(ubi, "data was successfully recovered");
 	return 0;
 
 out_unlock:
@@ -569,13 +570,13 @@ write_error:
 	 * Bad luck? This physical eraseblock is bad too? Crud. Let's try to
 	 * get another one.
 	 */
-	ubi_warn("failed to write to PEB %d", new_pnum);
+	ubi_warn(ubi, "failed to write to PEB %d", new_pnum);
 	ubi_wl_put_peb(ubi, vol_id, lnum, new_pnum, 1);
 	if (++tries > UBI_IO_RETRIES) {
 		ubi_free_vid_hdr(ubi, vid_hdr);
 		return err;
 	}
-	ubi_msg("try again");
+	ubi_msg(ubi, "try again");
 	goto retry;
 }
 
@@ -613,7 +614,7 @@ int ubi_eba_write_leb(struct ubi_device *ubi, struct ubi_volume *vol, int lnum,
 
 		err = ubi_io_write_data(ubi, buf, pnum, offset, len);
 		if (err) {
-			ubi_warn("failed to write data to PEB %d", pnum);
+			ubi_warn(ubi, "failed to write data to PEB %d", pnum);
 			if (err == -EIO && ubi->bad_allowed)
 				err = recover_peb(ubi, pnum, vol_id, lnum, buf,
 						  offset, len);
@@ -654,7 +655,7 @@ retry:
 
 	err = ubi_io_write_vid_hdr(ubi, pnum, vid_hdr);
 	if (err) {
-		ubi_warn("failed to write VID header to LEB %d:%d, PEB %d",
+		ubi_warn(ubi, "failed to write VID header to LEB %d:%d, PEB %d",
 			 vol_id, lnum, pnum);
 		goto write_error;
 	}
@@ -662,7 +663,7 @@ retry:
 	if (len) {
 		err = ubi_io_write_data(ubi, buf, pnum, offset, len);
 		if (err) {
-			ubi_warn("failed to write %d bytes at offset %d of LEB %d:%d, PEB %d",
+			ubi_warn(ubi, "failed to write %d bytes at offset %d of LEB %d:%d, PEB %d",
 				 len, offset, vol_id, lnum, pnum);
 			goto write_error;
 		}
@@ -698,7 +699,7 @@ write_error:
 	}
 
 	vid_hdr->sqnum = cpu_to_be64(ubi_next_sqnum(ubi));
-	ubi_msg("try another PEB");
+	ubi_msg(ubi, "try another PEB");
 	goto retry;
 }
 
@@ -775,14 +776,14 @@ retry:
 
 	err = ubi_io_write_vid_hdr(ubi, pnum, vid_hdr);
 	if (err) {
-		ubi_warn("failed to write VID header to LEB %d:%d, PEB %d",
+		ubi_warn(ubi, "failed to write VID header to LEB %d:%d, PEB %d",
 			 vol_id, lnum, pnum);
 		goto write_error;
 	}
 
 	err = ubi_io_write_data(ubi, buf, pnum, 0, len);
 	if (err) {
-		ubi_warn("failed to write %d bytes of data to PEB %d",
+		ubi_warn(ubi, "failed to write %d bytes of data to PEB %d",
 			 len, pnum);
 		goto write_error;
 	}
@@ -818,7 +819,7 @@ write_error:
 	}
 
 	vid_hdr->sqnum = cpu_to_be64(ubi_next_sqnum(ubi));
-	ubi_msg("try another PEB");
+	ubi_msg(ubi, "try another PEB");
 	goto retry;
 }
 
@@ -893,14 +894,14 @@ retry:
 
 	err = ubi_io_write_vid_hdr(ubi, pnum, vid_hdr);
 	if (err) {
-		ubi_warn("failed to write VID header to LEB %d:%d, PEB %d",
+		ubi_warn(ubi, "failed to write VID header to LEB %d:%d, PEB %d",
 			 vol_id, lnum, pnum);
 		goto write_error;
 	}
 
 	err = ubi_io_write_data(ubi, buf, pnum, 0, len);
 	if (err) {
-		ubi_warn("failed to write %d bytes of data to PEB %d",
+		ubi_warn(ubi, "failed to write %d bytes of data to PEB %d",
 			 len, pnum);
 		goto write_error;
 	}
@@ -940,7 +941,7 @@ write_error:
 	}
 
 	vid_hdr->sqnum = cpu_to_be64(ubi_next_sqnum(ubi));
-	ubi_msg("try another PEB");
+	ubi_msg(ubi, "try another PEB");
 	goto retry;
 }
 
@@ -1063,7 +1064,7 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
 	dbg_wl("read %d bytes of data", aldata_size);
 	err = ubi_io_read_data(ubi, ubi->peb_buf, from, 0, aldata_size);
 	if (err && err != UBI_IO_BITFLIPS) {
-		ubi_warn("error %d while reading data from PEB %d",
+		ubi_warn(ubi, "error %d while reading data from PEB %d",
 			 err, from);
 		err = MOVE_SOURCE_RD_ERR;
 		goto out_unlock_buf;
@@ -1113,7 +1114,7 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
 	err = ubi_io_read_vid_hdr(ubi, to, vid_hdr, 1);
 	if (err) {
 		if (err != UBI_IO_BITFLIPS) {
-			ubi_warn("error %d while reading VID header back from PEB %d",
+			ubi_warn(ubi, "error %d while reading VID header back from PEB %d",
 				 err, to);
 			if (is_error_sane(err))
 				err = MOVE_TARGET_RD_ERR;
@@ -1140,7 +1141,7 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
 		err = ubi_io_read_data(ubi, ubi->peb_buf, to, 0, aldata_size);
 		if (err) {
 			if (err != UBI_IO_BITFLIPS) {
-				ubi_warn("error %d while reading data back from PEB %d",
+				ubi_warn(ubi, "error %d while reading data back from PEB %d",
 					 err, to);
 				if (is_error_sane(err))
 					err = MOVE_TARGET_RD_ERR;
@@ -1152,7 +1153,7 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
 		cond_resched();
 
 		if (crc != crc32(UBI_CRC32_INIT, ubi->peb_buf, data_size)) {
-			ubi_warn("read data back from PEB %d and it is different",
+			ubi_warn(ubi, "read data back from PEB %d and it is different",
 				 to);
 			err = -EINVAL;
 			goto out_unlock_buf;
@@ -1205,10 +1206,10 @@ static void print_rsvd_warning(struct ubi_device *ubi,
 			return;
 	}
 
-	ubi_warn("cannot reserve enough PEBs for bad PEB handling, reserved %d, need %d",
+	ubi_warn(ubi, "cannot reserve enough PEBs for bad PEB handling, reserved %d, need %d",
 		 ubi->beb_rsvd_pebs, ubi->beb_rsvd_level);
 	if (ubi->corr_peb_count)
-		ubi_warn("%d PEBs are corrupted and not used",
+		ubi_warn(ubi, "%d PEBs are corrupted and not used",
 			 ubi->corr_peb_count);
 }
 
@@ -1286,7 +1287,7 @@ int self_check_eba(struct ubi_device *ubi, struct ubi_attach_info *ai_fastmap,
 					fm_eba[i][j] == UBI_LEB_UNMAPPED)
 					continue;
 
-				ubi_err("LEB:%i:%i is PEB:%i instead of %i!",
+				ubi_err(ubi, "LEB:%i:%i is PEB:%i instead of %i!",
 					vol->vol_id, i, fm_eba[i][j],
 					scan_eba[i][j]);
 				ubi_assert(0);
@@ -1366,10 +1367,10 @@ int ubi_eba_init(struct ubi_device *ubi, struct ubi_attach_info *ai)
 	}
 
 	if (ubi->avail_pebs < EBA_RESERVED_PEBS) {
-		ubi_err("no enough physical eraseblocks (%d, need %d)",
+		ubi_err(ubi, "no enough physical eraseblocks (%d, need %d)",
 			ubi->avail_pebs, EBA_RESERVED_PEBS);
 		if (ubi->corr_peb_count)
-			ubi_err("%d PEBs are corrupted and not used",
+			ubi_err(ubi, "%d PEBs are corrupted and not used",
 				ubi->corr_peb_count);
 		err = -ENOSPC;
 		goto out_free;
diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
index cfd5b5e90156..b56672bf3294 100644
--- a/drivers/mtd/ubi/fastmap.c
+++ b/drivers/mtd/ubi/fastmap.c
@@ -330,7 +330,7 @@ static int process_pool_aeb(struct ubi_device *ubi, struct ubi_attach_info *ai,
 	if (found)
 		av = tmp_av;
 	else {
-		ubi_err("orphaned volume in fastmap pool!");
+		ubi_err(ubi, "orphaned volume in fastmap pool!");
 		kmem_cache_free(ai->aeb_slab_cache, new_aeb);
 		return UBI_BAD_FASTMAP;
 	}
@@ -414,14 +414,14 @@ static int scan_pool(struct ubi_device *ubi, struct ubi_attach_info *ai,
 		pnum = be32_to_cpu(pebs[i]);
 
 		if (ubi_io_is_bad(ubi, pnum)) {
-			ubi_err("bad PEB in fastmap pool!");
+			ubi_err(ubi, "bad PEB in fastmap pool!");
 			ret = UBI_BAD_FASTMAP;
 			goto out;
 		}
 
 		err = ubi_io_read_ec_hdr(ubi, pnum, ech, 0);
 		if (err && err != UBI_IO_BITFLIPS) {
-			ubi_err("unable to read EC header! PEB:%i err:%i",
+			ubi_err(ubi, "unable to read EC header! PEB:%i err:%i",
 				pnum, err);
 			ret = err > 0 ? UBI_BAD_FASTMAP : err;
 			goto out;
@@ -435,7 +435,7 @@ static int scan_pool(struct ubi_device *ubi, struct ubi_attach_info *ai,
 		image_seq = be32_to_cpu(ech->image_seq);
 
 		if (image_seq && (image_seq != ubi->image_seq)) {
-			ubi_err("bad image seq: 0x%x, expected: 0x%x",
+			ubi_err(ubi, "bad image seq: 0x%x, expected: 0x%x",
 				be32_to_cpu(ech->image_seq), ubi->image_seq);
 			ret = UBI_BAD_FASTMAP;
 			goto out;
@@ -493,7 +493,7 @@ static int scan_pool(struct ubi_device *ubi, struct ubi_attach_info *ai,
 			}
 		} else {
 			/* We are paranoid and fall back to scanning mode */
-			ubi_err("fastmap pool PEBs contains damaged PEBs!");
+			ubi_err(ubi, "fastmap pool PEBs contains damaged PEBs!");
 			ret = err > 0 ? UBI_BAD_FASTMAP : err;
 			goto out;
 		}
@@ -588,7 +588,7 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
 		goto fail_bad;
 
 	if (be32_to_cpu(fmhdr->magic) != UBI_FM_HDR_MAGIC) {
-		ubi_err("bad fastmap header magic: 0x%x, expected: 0x%x",
+		ubi_err(ubi, "bad fastmap header magic: 0x%x, expected: 0x%x",
 			be32_to_cpu(fmhdr->magic), UBI_FM_HDR_MAGIC);
 		goto fail_bad;
 	}
@@ -598,7 +598,7 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
 	if (fm_pos >= fm_size)
 		goto fail_bad;
 	if (be32_to_cpu(fmpl1->magic) != UBI_FM_POOL_MAGIC) {
-		ubi_err("bad fastmap pool magic: 0x%x, expected: 0x%x",
+		ubi_err(ubi, "bad fastmap pool magic: 0x%x, expected: 0x%x",
 			be32_to_cpu(fmpl1->magic), UBI_FM_POOL_MAGIC);
 		goto fail_bad;
 	}
@@ -608,7 +608,7 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
 	if (fm_pos >= fm_size)
 		goto fail_bad;
 	if (be32_to_cpu(fmpl2->magic) != UBI_FM_POOL_MAGIC) {
-		ubi_err("bad fastmap pool magic: 0x%x, expected: 0x%x",
+		ubi_err(ubi, "bad fastmap pool magic: 0x%x, expected: 0x%x",
 			be32_to_cpu(fmpl2->magic), UBI_FM_POOL_MAGIC);
 		goto fail_bad;
 	}
@@ -619,25 +619,26 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
 	fm->max_wl_pool_size = be16_to_cpu(fmpl2->max_size);
 
 	if (pool_size > UBI_FM_MAX_POOL_SIZE || pool_size < 0) {
-		ubi_err("bad pool size: %i", pool_size);
+		ubi_err(ubi, "bad pool size: %i", pool_size);
 		goto fail_bad;
 	}
 
 	if (wl_pool_size > UBI_FM_MAX_POOL_SIZE || wl_pool_size < 0) {
-		ubi_err("bad WL pool size: %i", wl_pool_size);
+		ubi_err(ubi, "bad WL pool size: %i", wl_pool_size);
 		goto fail_bad;
 	}
 
 
 	if (fm->max_pool_size > UBI_FM_MAX_POOL_SIZE ||
 	    fm->max_pool_size < 0) {
-		ubi_err("bad maximal pool size: %i", fm->max_pool_size);
+		ubi_err(ubi, "bad maximal pool size: %i", fm->max_pool_size);
 		goto fail_bad;
 	}
 
 	if (fm->max_wl_pool_size > UBI_FM_MAX_POOL_SIZE ||
 	    fm->max_wl_pool_size < 0) {
-		ubi_err("bad maximal WL pool size: %i", fm->max_wl_pool_size);
+		ubi_err(ubi, "bad maximal WL pool size: %i",
+			fm->max_wl_pool_size);
 		goto fail_bad;
 	}
 
@@ -696,8 +697,7 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
 			goto fail_bad;
 
 		if (be32_to_cpu(fmvhdr->magic) != UBI_FM_VHDR_MAGIC) {
-			ubi_err("bad fastmap vol header magic: 0x%x, " \
-				"expected: 0x%x",
+			ubi_err(ubi, "bad fastmap vol header magic: 0x%x, expected: 0x%x",
 				be32_to_cpu(fmvhdr->magic), UBI_FM_VHDR_MAGIC);
 			goto fail_bad;
 		}
@@ -722,8 +722,7 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
 			goto fail_bad;
 
 		if (be32_to_cpu(fm_eba->magic) != UBI_FM_EBA_MAGIC) {
-			ubi_err("bad fastmap EBA header magic: 0x%x, " \
-				"expected: 0x%x",
+			ubi_err(ubi, "bad fastmap EBA header magic: 0x%x, expected: 0x%x",
 				be32_to_cpu(fm_eba->magic), UBI_FM_EBA_MAGIC);
 			goto fail_bad;
 		}
@@ -788,7 +787,7 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
 			int err;
 
 			if (ubi_io_is_bad(ubi, tmp_aeb->pnum)) {
-				ubi_err("bad PEB in fastmap EBA orphan list");
+				ubi_err(ubi, "bad PEB in fastmap EBA orphan list");
 				ret = UBI_BAD_FASTMAP;
 				kfree(ech);
 				goto fail;
@@ -796,8 +795,8 @@ static int ubi_attach_fastmap(struct ubi_device *ubi,
 
 			err = ubi_io_read_ec_hdr(ubi, tmp_aeb->pnum, ech, 0);
 			if (err && err != UBI_IO_BITFLIPS) {
-				ubi_err("unable to read EC header! PEB:%i " \
-					"err:%i", tmp_aeb->pnum, err);
+				ubi_err(ubi, "unable to read EC header! PEB:%i err:%i",
+					tmp_aeb->pnum, err);
 				ret = err > 0 ? UBI_BAD_FASTMAP : err;
 				kfree(ech);
 
@@ -908,14 +907,14 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
 		fm->to_be_tortured[0] = 1;
 
 	if (be32_to_cpu(fmsb->magic) != UBI_FM_SB_MAGIC) {
-		ubi_err("bad super block magic: 0x%x, expected: 0x%x",
+		ubi_err(ubi, "bad super block magic: 0x%x, expected: 0x%x",
 			be32_to_cpu(fmsb->magic), UBI_FM_SB_MAGIC);
 		ret = UBI_BAD_FASTMAP;
 		goto free_fm_sb;
 	}
 
 	if (fmsb->version != UBI_FM_FMT_VERSION) {
-		ubi_err("bad fastmap version: %i, expected: %i",
+		ubi_err(ubi, "bad fastmap version: %i, expected: %i",
 			fmsb->version, UBI_FM_FMT_VERSION);
 		ret = UBI_BAD_FASTMAP;
 		goto free_fm_sb;
@@ -923,15 +922,16 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
 
 	used_blocks = be32_to_cpu(fmsb->used_blocks);
 	if (used_blocks > UBI_FM_MAX_BLOCKS || used_blocks < 1) {
-		ubi_err("number of fastmap blocks is invalid: %i", used_blocks);
+		ubi_err(ubi, "number of fastmap blocks is invalid: %i",
+			used_blocks);
 		ret = UBI_BAD_FASTMAP;
 		goto free_fm_sb;
 	}
 
 	fm_size = ubi->leb_size * used_blocks;
 	if (fm_size != ubi->fm_size) {
-		ubi_err("bad fastmap size: %zi, expected: %zi", fm_size,
-			ubi->fm_size);
+		ubi_err(ubi, "bad fastmap size: %zi, expected: %zi",
+			fm_size, ubi->fm_size);
 		ret = UBI_BAD_FASTMAP;
 		goto free_fm_sb;
 	}
@@ -960,7 +960,7 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
 
 		ret = ubi_io_read_ec_hdr(ubi, pnum, ech, 0);
 		if (ret && ret != UBI_IO_BITFLIPS) {
-			ubi_err("unable to read fastmap block# %i EC (PEB: %i)",
+			ubi_err(ubi, "unable to read fastmap block# %i EC (PEB: %i)",
 				i, pnum);
 			if (ret > 0)
 				ret = UBI_BAD_FASTMAP;
@@ -977,7 +977,7 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
 		 * we shouldn't fail if image_seq == 0.
 		 */
 		if (image_seq && (image_seq != ubi->image_seq)) {
-			ubi_err("wrong image seq:%d instead of %d",
+			ubi_err(ubi, "wrong image seq:%d instead of %d",
 				be32_to_cpu(ech->image_seq), ubi->image_seq);
 			ret = UBI_BAD_FASTMAP;
 			goto free_hdr;
@@ -985,15 +985,14 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
 
 		ret = ubi_io_read_vid_hdr(ubi, pnum, vh, 0);
 		if (ret && ret != UBI_IO_BITFLIPS) {
-			ubi_err("unable to read fastmap block# %i (PEB: %i)",
+			ubi_err(ubi, "unable to read fastmap block# %i (PEB: %i)",
 				i, pnum);
 			goto free_hdr;
 		}
 
 		if (i == 0) {
 			if (be32_to_cpu(vh->vol_id) != UBI_FM_SB_VOLUME_ID) {
-				ubi_err("bad fastmap anchor vol_id: 0x%x," \
-					" expected: 0x%x",
+				ubi_err(ubi, "bad fastmap anchor vol_id: 0x%x, expected: 0x%x",
 					be32_to_cpu(vh->vol_id),
 					UBI_FM_SB_VOLUME_ID);
 				ret = UBI_BAD_FASTMAP;
@@ -1001,8 +1000,7 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
 			}
 		} else {
 			if (be32_to_cpu(vh->vol_id) != UBI_FM_DATA_VOLUME_ID) {
-				ubi_err("bad fastmap data vol_id: 0x%x," \
-					" expected: 0x%x",
+				ubi_err(ubi, "bad fastmap data vol_id: 0x%x, expected: 0x%x",
 					be32_to_cpu(vh->vol_id),
 					UBI_FM_DATA_VOLUME_ID);
 				ret = UBI_BAD_FASTMAP;
@@ -1016,7 +1014,7 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
 		ret = ubi_io_read(ubi, ubi->fm_buf + (ubi->leb_size * i), pnum,
 				  ubi->leb_start, ubi->leb_size);
 		if (ret && ret != UBI_IO_BITFLIPS) {
-			ubi_err("unable to read fastmap block# %i (PEB: %i, " \
+			ubi_err(ubi, "unable to read fastmap block# %i (PEB: %i, "
 				"err: %i)", i, pnum, ret);
 			goto free_hdr;
 		}
@@ -1030,8 +1028,9 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
 	fmsb2->data_crc = 0;
 	crc = crc32(UBI_CRC32_INIT, ubi->fm_buf, fm_size);
 	if (crc != tmp_crc) {
-		ubi_err("fastmap data CRC is invalid");
-		ubi_err("CRC should be: 0x%x, calc: 0x%x", tmp_crc, crc);
+		ubi_err(ubi, "fastmap data CRC is invalid");
+		ubi_err(ubi, "CRC should be: 0x%x, calc: 0x%x",
+			tmp_crc, crc);
 		ret = UBI_BAD_FASTMAP;
 		goto free_hdr;
 	}
@@ -1067,9 +1066,10 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
 	ubi->fm = fm;
 	ubi->fm_pool.max_size = ubi->fm->max_pool_size;
 	ubi->fm_wl_pool.max_size = ubi->fm->max_wl_pool_size;
-	ubi_msg("attached by fastmap");
-	ubi_msg("fastmap pool size: %d", ubi->fm_pool.max_size);
-	ubi_msg("fastmap WL pool size: %d", ubi->fm_wl_pool.max_size);
+	ubi_msg(ubi, "attached by fastmap");
+	ubi_msg(ubi, "fastmap pool size: %d", ubi->fm_pool.max_size);
+	ubi_msg(ubi, "fastmap WL pool size: %d",
+		ubi->fm_wl_pool.max_size);
 	ubi->fm_disabled = 0;
 
 	ubi_free_vid_hdr(ubi, vh);
@@ -1077,7 +1077,7 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
 out:
 	mutex_unlock(&ubi->fm_mutex);
 	if (ret == UBI_BAD_FASTMAP)
-		ubi_err("Attach by fastmap failed, doing a full scan!");
+		ubi_err(ubi, "Attach by fastmap failed, doing a full scan!");
 	return ret;
 
 free_hdr:
@@ -1273,7 +1273,7 @@ static int ubi_write_fastmap(struct ubi_device *ubi,
 	dbg_bld("writing fastmap SB to PEB %i", new_fm->e[0]->pnum);
 	ret = ubi_io_write_vid_hdr(ubi, new_fm->e[0]->pnum, avhdr);
 	if (ret) {
-		ubi_err("unable to write vid_hdr to fastmap SB!");
+		ubi_err(ubi, "unable to write vid_hdr to fastmap SB!");
 		goto out_kfree;
 	}
 
@@ -1293,7 +1293,7 @@ static int ubi_write_fastmap(struct ubi_device *ubi,
 			new_fm->e[i]->pnum, be64_to_cpu(dvhdr->sqnum));
 		ret = ubi_io_write_vid_hdr(ubi, new_fm->e[i]->pnum, dvhdr);
 		if (ret) {
-			ubi_err("unable to write vid_hdr to PEB %i!",
+			ubi_err(ubi, "unable to write vid_hdr to PEB %i!",
 				new_fm->e[i]->pnum);
 			goto out_kfree;
 		}
@@ -1303,7 +1303,7 @@ static int ubi_write_fastmap(struct ubi_device *ubi,
 		ret = ubi_io_write(ubi, fm_raw + (i * ubi->leb_size),
 			new_fm->e[i]->pnum, ubi->leb_start, ubi->leb_size);
 		if (ret) {
-			ubi_err("unable to write fastmap to PEB %i!",
+			ubi_err(ubi, "unable to write fastmap to PEB %i!",
 				new_fm->e[i]->pnum);
 			goto out_kfree;
 		}
@@ -1450,7 +1450,7 @@ int ubi_update_fastmap(struct ubi_device *ubi)
 	ubi->fm = NULL;
 
 	if (new_fm->used_blocks > UBI_FM_MAX_BLOCKS) {
-		ubi_err("fastmap too large");
+		ubi_err(ubi, "fastmap too large");
 		ret = -ENOSPC;
 		goto err;
 	}
@@ -1462,7 +1462,7 @@ int ubi_update_fastmap(struct ubi_device *ubi)
 
 		if (!tmp_e && !old_fm) {
 			int j;
-			ubi_err("could not get any free erase block");
+			ubi_err(ubi, "could not get any free erase block");
 
 			for (j = 1; j < i; j++)
 				ubi_wl_put_fm_peb(ubi, new_fm->e[j], j, 0);
@@ -1478,7 +1478,7 @@ int ubi_update_fastmap(struct ubi_device *ubi)
 					ubi_wl_put_fm_peb(ubi, new_fm->e[j],
 							  j, 0);
 
-				ubi_err("could not erase old fastmap PEB");
+				ubi_err(ubi, "could not erase old fastmap PEB");
 				goto err;
 			}
 
@@ -1504,7 +1504,7 @@ int ubi_update_fastmap(struct ubi_device *ubi)
 			ret = erase_block(ubi, old_fm->e[0]->pnum);
 			if (ret < 0) {
 				int i;
-				ubi_err("could not erase old anchor PEB");
+				ubi_err(ubi, "could not erase old anchor PEB");
 
 				for (i = 1; i < new_fm->used_blocks; i++)
 					ubi_wl_put_fm_peb(ubi, new_fm->e[i],
@@ -1525,7 +1525,7 @@ int ubi_update_fastmap(struct ubi_device *ubi)
 	} else {
 		if (!tmp_e) {
 			int i;
-			ubi_err("could not find any anchor PEB");
+			ubi_err(ubi, "could not find any anchor PEB");
 
 			for (i = 1; i < new_fm->used_blocks; i++)
 				ubi_wl_put_fm_peb(ubi, new_fm->e[i], i, 0);
@@ -1555,13 +1555,13 @@ out_unlock:
 err:
 	kfree(new_fm);
 
-	ubi_warn("Unable to write new fastmap, err=%i", ret);
+	ubi_warn(ubi, "Unable to write new fastmap, err=%i", ret);
 
 	ret = 0;
 	if (old_fm) {
 		ret = invalidate_fastmap(ubi, old_fm);
 		if (ret < 0)
-			ubi_err("Unable to invalidiate current fastmap!");
+			ubi_err(ubi, "Unable to invalidiate current fastmap!");
 		else if (ret)
 			ret = 0;
 	}
diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c
index d36134925d31..396aaa543362 100644
--- a/drivers/mtd/ubi/io.c
+++ b/drivers/mtd/ubi/io.c
@@ -177,19 +177,20 @@ retry:
 			 * enabled. A corresponding message will be printed
 			 * later, when it is has been scrubbed.
 			 */
-			ubi_msg("fixable bit-flip detected at PEB %d", pnum);
+			ubi_msg(ubi, "fixable bit-flip detected at PEB %d",
+				pnum);
 			ubi_assert(len == read);
 			return UBI_IO_BITFLIPS;
 		}
 
 		if (retries++ < UBI_IO_RETRIES) {
-			ubi_warn("error %d%s while reading %d bytes from PEB %d:%d, read only %zd bytes, retry",
+			ubi_warn(ubi, "error %d%s while reading %d bytes from PEB %d:%d, read only %zd bytes, retry",
 				 err, errstr, len, pnum, offset, read);
 			yield();
 			goto retry;
 		}
 
-		ubi_err("error %d%s while reading %d bytes from PEB %d:%d, read %zd bytes",
+		ubi_err(ubi, "error %d%s while reading %d bytes from PEB %d:%d, read %zd bytes",
 			err, errstr, len, pnum, offset, read);
 		dump_stack();
 
@@ -246,7 +247,7 @@ int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
 	ubi_assert(len > 0 && len % ubi->hdrs_min_io_size == 0);
 
 	if (ubi->ro_mode) {
-		ubi_err("read-only mode");
+		ubi_err(ubi, "read-only mode");
 		return -EROFS;
 	}
 
@@ -273,7 +274,7 @@ int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
 	}
 
 	if (ubi_dbg_is_write_failure(ubi)) {
-		ubi_err("cannot write %d bytes to PEB %d:%d (emulated)",
+		ubi_err(ubi, "cannot write %d bytes to PEB %d:%d (emulated)",
 			len, pnum, offset);
 		dump_stack();
 		return -EIO;
@@ -282,7 +283,7 @@ int ubi_io_write(struct ubi_device *ubi, const void *buf, int pnum, int offset,
 	addr = (loff_t)pnum * ubi->peb_size + offset;
 	err = mtd_write(ubi->mtd, addr, len, &written, buf);
 	if (err) {
-		ubi_err("error %d while writing %d bytes to PEB %d:%d, written %zd bytes",
+		ubi_err(ubi, "error %d while writing %d bytes to PEB %d:%d, written %zd bytes",
 			err, len, pnum, offset, written);
 		dump_stack();
 		ubi_dump_flash(ubi, pnum, offset, len);
@@ -338,7 +339,7 @@ static int do_sync_erase(struct ubi_device *ubi, int pnum)
 	ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
 
 	if (ubi->ro_mode) {
-		ubi_err("read-only mode");
+		ubi_err(ubi, "read-only mode");
 		return -EROFS;
 	}
 
@@ -355,12 +356,12 @@ retry:
 	err = mtd_erase(ubi->mtd, &ei);
 	if (err) {
 		if (retries++ < UBI_IO_RETRIES) {
-			ubi_warn("error %d while erasing PEB %d, retry",
+			ubi_warn(ubi, "error %d while erasing PEB %d, retry",
 				 err, pnum);
 			yield();
 			goto retry;
 		}
-		ubi_err("cannot erase PEB %d, error %d", pnum, err);
+		ubi_err(ubi, "cannot erase PEB %d, error %d", pnum, err);
 		dump_stack();
 		return err;
 	}
@@ -368,17 +369,18 @@ retry:
 	err = wait_event_interruptible(wq, ei.state == MTD_ERASE_DONE ||
 					   ei.state == MTD_ERASE_FAILED);
 	if (err) {
-		ubi_err("interrupted PEB %d erasure", pnum);
+		ubi_err(ubi, "interrupted PEB %d erasure", pnum);
 		return -EINTR;
 	}
 
 	if (ei.state == MTD_ERASE_FAILED) {
 		if (retries++ < UBI_IO_RETRIES) {
-			ubi_warn("error while erasing PEB %d, retry", pnum);
+			ubi_warn(ubi, "error while erasing PEB %d, retry",
+				 pnum);
 			yield();
 			goto retry;
 		}
-		ubi_err("cannot erase PEB %d", pnum);
+		ubi_err(ubi, "cannot erase PEB %d", pnum);
 		dump_stack();
 		return -EIO;
 	}
@@ -388,7 +390,7 @@ retry:
 		return err;
 
 	if (ubi_dbg_is_erase_failure(ubi)) {
-		ubi_err("cannot erase PEB %d (emulated)", pnum);
+		ubi_err(ubi, "cannot erase PEB %d (emulated)", pnum);
 		return -EIO;
 	}
 
@@ -411,7 +413,7 @@ static int torture_peb(struct ubi_device *ubi, int pnum)
 {
 	int err, i, patt_count;
 
-	ubi_msg("run torture test for PEB %d", pnum);
+	ubi_msg(ubi, "run torture test for PEB %d", pnum);
 	patt_count = ARRAY_SIZE(patterns);
 	ubi_assert(patt_count > 0);
 
@@ -428,7 +430,7 @@ static int torture_peb(struct ubi_device *ubi, int pnum)
 
 		err = ubi_check_pattern(ubi->peb_buf, 0xFF, ubi->peb_size);
 		if (err == 0) {
-			ubi_err("erased PEB %d, but a non-0xFF byte found",
+			ubi_err(ubi, "erased PEB %d, but a non-0xFF byte found",
 				pnum);
 			err = -EIO;
 			goto out;
@@ -448,7 +450,7 @@ static int torture_peb(struct ubi_device *ubi, int pnum)
 		err = ubi_check_pattern(ubi->peb_buf, patterns[i],
 					ubi->peb_size);
 		if (err == 0) {
-			ubi_err("pattern %x checking failed for PEB %d",
+			ubi_err(ubi, "pattern %x checking failed for PEB %d",
 				patterns[i], pnum);
 			err = -EIO;
 			goto out;
@@ -456,7 +458,7 @@ static int torture_peb(struct ubi_device *ubi, int pnum)
 	}
 
 	err = patt_count;
-	ubi_msg("PEB %d passed torture test, do not mark it as bad", pnum);
+	ubi_msg(ubi, "PEB %d passed torture test, do not mark it as bad", pnum);
 
 out:
 	mutex_unlock(&ubi->buf_mutex);
@@ -466,7 +468,7 @@ out:
 		 * has not passed because it happened on a freshly erased
 		 * physical eraseblock which means something is wrong with it.
 		 */
-		ubi_err("read problems on freshly erased PEB %d, must be bad",
+		ubi_err(ubi, "read problems on freshly erased PEB %d, must be bad",
 			pnum);
 		err = -EIO;
 	}
@@ -542,7 +544,7 @@ error:
 	 * it. Supposedly the flash media or the driver is screwed up, so
 	 * return an error.
 	 */
-	ubi_err("cannot invalidate PEB %d, write returned %d", pnum, err);
+	ubi_err(ubi, "cannot invalidate PEB %d, write returned %d", pnum, err);
 	ubi_dump_flash(ubi, pnum, 0, ubi->peb_size);
 	return -EIO;
 }
@@ -574,7 +576,7 @@ int ubi_io_sync_erase(struct ubi_device *ubi, int pnum, int torture)
 		return err;
 
 	if (ubi->ro_mode) {
-		ubi_err("read-only mode");
+		ubi_err(ubi, "read-only mode");
 		return -EROFS;
 	}
 
@@ -616,7 +618,7 @@ int ubi_io_is_bad(const struct ubi_device *ubi, int pnum)
 
 		ret = mtd_block_isbad(mtd, (loff_t)pnum * ubi->peb_size);
 		if (ret < 0)
-			ubi_err("error %d while checking if PEB %d is bad",
+			ubi_err(ubi, "error %d while checking if PEB %d is bad",
 				ret, pnum);
 		else if (ret)
 			dbg_io("PEB %d is bad", pnum);
@@ -642,7 +644,7 @@ int ubi_io_mark_bad(const struct ubi_device *ubi, int pnum)
 	ubi_assert(pnum >= 0 && pnum < ubi->peb_count);
 
 	if (ubi->ro_mode) {
-		ubi_err("read-only mode");
+		ubi_err(ubi, "read-only mode");
 		return -EROFS;
 	}
 
@@ -651,7 +653,7 @@ int ubi_io_mark_bad(const struct ubi_device *ubi, int pnum)
 
 	err = mtd_block_markbad(mtd, (loff_t)pnum * ubi->peb_size);
 	if (err)
-		ubi_err("cannot mark PEB %d bad, error %d", pnum, err);
+		ubi_err(ubi, "cannot mark PEB %d bad, error %d", pnum, err);
 	return err;
 }
 
@@ -674,32 +676,32 @@ static int validate_ec_hdr(const struct ubi_device *ubi,
 	leb_start = be32_to_cpu(ec_hdr->data_offset);
 
 	if (ec_hdr->version != UBI_VERSION) {
-		ubi_err("node with incompatible UBI version found: this UBI version is %d, image version is %d",
+		ubi_err(ubi, "node with incompatible UBI version found: this UBI version is %d, image version is %d",
 			UBI_VERSION, (int)ec_hdr->version);
 		goto bad;
 	}
 
 	if (vid_hdr_offset != ubi->vid_hdr_offset) {
-		ubi_err("bad VID header offset %d, expected %d",
+		ubi_err(ubi, "bad VID header offset %d, expected %d",
 			vid_hdr_offset, ubi->vid_hdr_offset);
 		goto bad;
 	}
 
 	if (leb_start != ubi->leb_start) {
-		ubi_err("bad data offset %d, expected %d",
+		ubi_err(ubi, "bad data offset %d, expected %d",
 			leb_start, ubi->leb_start);
 		goto bad;
 	}
 
 	if (ec < 0 || ec > UBI_MAX_ERASECOUNTER) {
-		ubi_err("bad erase counter %lld", ec);
+		ubi_err(ubi, "bad erase counter %lld", ec);
 		goto bad;
 	}
 
 	return 0;
 
 bad:
-	ubi_err("bad EC header");
+	ubi_err(ubi, "bad EC header");
 	ubi_dump_ec_hdr(ec_hdr);
 	dump_stack();
 	return 1;
@@ -765,7 +767,7 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
 		if (ubi_check_pattern(ec_hdr, 0xFF, UBI_EC_HDR_SIZE)) {
 			/* The physical eraseblock is supposedly empty */
 			if (verbose)
-				ubi_warn("no EC header found at PEB %d, only 0xFF bytes",
+				ubi_warn(ubi, "no EC header found at PEB %d, only 0xFF bytes",
 					 pnum);
 			dbg_bld("no EC header found at PEB %d, only 0xFF bytes",
 				pnum);
@@ -780,7 +782,7 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
 		 * 0xFF bytes. Report that the header is corrupted.
 		 */
 		if (verbose) {
-			ubi_warn("bad magic number at PEB %d: %08x instead of %08x",
+			ubi_warn(ubi, "bad magic number at PEB %d: %08x instead of %08x",
 				 pnum, magic, UBI_EC_HDR_MAGIC);
 			ubi_dump_ec_hdr(ec_hdr);
 		}
@@ -794,7 +796,7 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
 
 	if (hdr_crc != crc) {
 		if (verbose) {
-			ubi_warn("bad EC header CRC at PEB %d, calculated %#08x, read %#08x",
+			ubi_warn(ubi, "bad EC header CRC at PEB %d, calculated %#08x, read %#08x",
 				 pnum, crc, hdr_crc);
 			ubi_dump_ec_hdr(ec_hdr);
 		}
@@ -810,7 +812,7 @@ int ubi_io_read_ec_hdr(struct ubi_device *ubi, int pnum,
 	/* And of course validate what has just been read from the media */
 	err = validate_ec_hdr(ubi, ec_hdr);
 	if (err) {
-		ubi_err("validation failed for PEB %d", pnum);
+		ubi_err(ubi, "validation failed for PEB %d", pnum);
 		return -EINVAL;
 	}
 
@@ -884,40 +886,40 @@ static int validate_vid_hdr(const struct ubi_device *ubi,
 	int usable_leb_size = ubi->leb_size - data_pad;
 
 	if (copy_flag != 0 && copy_flag != 1) {
-		ubi_err("bad copy_flag");
+		ubi_err(ubi, "bad copy_flag");
 		goto bad;
 	}
 
 	if (vol_id < 0 || lnum < 0 || data_size < 0 || used_ebs < 0 ||
 	    data_pad < 0) {
-		ubi_err("negative values");
+		ubi_err(ubi, "negative values");
 		goto bad;
 	}
 
 	if (vol_id >= UBI_MAX_VOLUMES && vol_id < UBI_INTERNAL_VOL_START) {
-		ubi_err("bad vol_id");
+		ubi_err(ubi, "bad vol_id");
 		goto bad;
 	}
 
 	if (vol_id < UBI_INTERNAL_VOL_START && compat != 0) {
-		ubi_err("bad compat");
+		ubi_err(ubi, "bad compat");
 		goto bad;
 	}
 
 	if (vol_id >= UBI_INTERNAL_VOL_START && compat != UBI_COMPAT_DELETE &&
 	    compat != UBI_COMPAT_RO && compat != UBI_COMPAT_PRESERVE &&
 	    compat != UBI_COMPAT_REJECT) {
-		ubi_err("bad compat");
+		ubi_err(ubi, "bad compat");
 		goto bad;
 	}
 
 	if (vol_type != UBI_VID_DYNAMIC && vol_type != UBI_VID_STATIC) {
-		ubi_err("bad vol_type");
+		ubi_err(ubi, "bad vol_type");
 		goto bad;
 	}
 
 	if (data_pad >= ubi->leb_size / 2) {
-		ubi_err("bad data_pad");
+		ubi_err(ubi, "bad data_pad");
 		goto bad;
 	}
 
@@ -929,45 +931,45 @@ static int validate_vid_hdr(const struct ubi_device *ubi,
 		 * mapped logical eraseblocks.
 		 */
 		if (used_ebs == 0) {
-			ubi_err("zero used_ebs");
+			ubi_err(ubi, "zero used_ebs");
 			goto bad;
 		}
 		if (data_size == 0) {
-			ubi_err("zero data_size");
+			ubi_err(ubi, "zero data_size");
 			goto bad;
 		}
 		if (lnum < used_ebs - 1) {
 			if (data_size != usable_leb_size) {
-				ubi_err("bad data_size");
+				ubi_err(ubi, "bad data_size");
 				goto bad;
 			}
 		} else if (lnum == used_ebs - 1) {
 			if (data_size == 0) {
-				ubi_err("bad data_size at last LEB");
+				ubi_err(ubi, "bad data_size at last LEB");
 				goto bad;
 			}
 		} else {
-			ubi_err("too high lnum");
+			ubi_err(ubi, "too high lnum");
 			goto bad;
 		}
 	} else {
 		if (copy_flag == 0) {
 			if (data_crc != 0) {
-				ubi_err("non-zero data CRC");
+				ubi_err(ubi, "non-zero data CRC");
 				goto bad;
 			}
 			if (data_size != 0) {
-				ubi_err("non-zero data_size");
+				ubi_err(ubi, "non-zero data_size");
 				goto bad;
 			}
 		} else {
 			if (data_size == 0) {
-				ubi_err("zero data_size of copy");
+				ubi_err(ubi, "zero data_size of copy");
 				goto bad;
 			}
 		}
 		if (used_ebs != 0) {
-			ubi_err("bad used_ebs");
+			ubi_err(ubi, "bad used_ebs");
 			goto bad;
 		}
 	}
@@ -975,7 +977,7 @@ static int validate_vid_hdr(const struct ubi_device *ubi,
 	return 0;
 
 bad:
-	ubi_err("bad VID header");
+	ubi_err(ubi, "bad VID header");
 	ubi_dump_vid_hdr(vid_hdr);
 	dump_stack();
 	return 1;
@@ -1020,7 +1022,7 @@ int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
 
 		if (ubi_check_pattern(vid_hdr, 0xFF, UBI_VID_HDR_SIZE)) {
 			if (verbose)
-				ubi_warn("no VID header found at PEB %d, only 0xFF bytes",
+				ubi_warn(ubi, "no VID header found at PEB %d, only 0xFF bytes",
 					 pnum);
 			dbg_bld("no VID header found at PEB %d, only 0xFF bytes",
 				pnum);
@@ -1031,7 +1033,7 @@ int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
 		}
 
 		if (verbose) {
-			ubi_warn("bad magic number at PEB %d: %08x instead of %08x",
+			ubi_warn(ubi, "bad magic number at PEB %d: %08x instead of %08x",
 				 pnum, magic, UBI_VID_HDR_MAGIC);
 			ubi_dump_vid_hdr(vid_hdr);
 		}
@@ -1045,7 +1047,7 @@ int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
 
 	if (hdr_crc != crc) {
 		if (verbose) {
-			ubi_warn("bad CRC at PEB %d, calculated %#08x, read %#08x",
+			ubi_warn(ubi, "bad CRC at PEB %d, calculated %#08x, read %#08x",
 				 pnum, crc, hdr_crc);
 			ubi_dump_vid_hdr(vid_hdr);
 		}
@@ -1059,7 +1061,7 @@ int ubi_io_read_vid_hdr(struct ubi_device *ubi, int pnum,
 
 	err = validate_vid_hdr(ubi, vid_hdr);
 	if (err) {
-		ubi_err("validation failed for PEB %d", pnum);
+		ubi_err(ubi, "validation failed for PEB %d", pnum);
 		return -EINVAL;
 	}
 
@@ -1129,7 +1131,7 @@ static int self_check_not_bad(const struct ubi_device *ubi, int pnum)
 	if (!err)
 		return err;
 
-	ubi_err("self-check failed for PEB %d", pnum);
+	ubi_err(ubi, "self-check failed for PEB %d", pnum);
 	dump_stack();
 	return err > 0 ? -EINVAL : err;
 }
@@ -1154,14 +1156,14 @@ static int self_check_ec_hdr(const struct ubi_device *ubi, int pnum,
 
 	magic = be32_to_cpu(ec_hdr->magic);
 	if (magic != UBI_EC_HDR_MAGIC) {
-		ubi_err("bad magic %#08x, must be %#08x",
+		ubi_err(ubi, "bad magic %#08x, must be %#08x",
 			magic, UBI_EC_HDR_MAGIC);
 		goto fail;
 	}
 
 	err = validate_ec_hdr(ubi, ec_hdr);
 	if (err) {
-		ubi_err("self-check failed for PEB %d", pnum);
+		ubi_err(ubi, "self-check failed for PEB %d", pnum);
 		goto fail;
 	}
 
@@ -1201,8 +1203,9 @@ static int self_check_peb_ec_hdr(const struct ubi_device *ubi, int pnum)
 	crc = crc32(UBI_CRC32_INIT, ec_hdr, UBI_EC_HDR_SIZE_CRC);
 	hdr_crc = be32_to_cpu(ec_hdr->hdr_crc);
 	if (hdr_crc != crc) {
-		ubi_err("bad CRC, calculated %#08x, read %#08x", crc, hdr_crc);
-		ubi_err("self-check failed for PEB %d", pnum);
+		ubi_err(ubi, "bad CRC, calculated %#08x, read %#08x",
+			crc, hdr_crc);
+		ubi_err(ubi, "self-check failed for PEB %d", pnum);
 		ubi_dump_ec_hdr(ec_hdr);
 		dump_stack();
 		err = -EINVAL;
@@ -1236,21 +1239,21 @@ static int self_check_vid_hdr(const struct ubi_device *ubi, int pnum,
 
 	magic = be32_to_cpu(vid_hdr->magic);
 	if (magic != UBI_VID_HDR_MAGIC) {
-		ubi_err("bad VID header magic %#08x at PEB %d, must be %#08x",
+		ubi_err(ubi, "bad VID header magic %#08x at PEB %d, must be %#08x",
 			magic, pnum, UBI_VID_HDR_MAGIC);
 		goto fail;
 	}
 
 	err = validate_vid_hdr(ubi, vid_hdr);
 	if (err) {
-		ubi_err("self-check failed for PEB %d", pnum);
+		ubi_err(ubi, "self-check failed for PEB %d", pnum);
 		goto fail;
 	}
 
 	return err;
 
 fail:
-	ubi_err("self-check failed for PEB %d", pnum);
+	ubi_err(ubi, "self-check failed for PEB %d", pnum);
 	ubi_dump_vid_hdr(vid_hdr);
 	dump_stack();
 	return -EINVAL;
@@ -1288,9 +1291,9 @@ static int self_check_peb_vid_hdr(const struct ubi_device *ubi, int pnum)
 	crc = crc32(UBI_CRC32_INIT, vid_hdr, UBI_EC_HDR_SIZE_CRC);
 	hdr_crc = be32_to_cpu(vid_hdr->hdr_crc);
 	if (hdr_crc != crc) {
-		ubi_err("bad VID header CRC at PEB %d, calculated %#08x, read %#08x",
+		ubi_err(ubi, "bad VID header CRC at PEB %d, calculated %#08x, read %#08x",
 			pnum, crc, hdr_crc);
-		ubi_err("self-check failed for PEB %d", pnum);
+		ubi_err(ubi, "self-check failed for PEB %d", pnum);
 		ubi_dump_vid_hdr(vid_hdr);
 		dump_stack();
 		err = -EINVAL;
@@ -1329,7 +1332,7 @@ static int self_check_write(struct ubi_device *ubi, const void *buf, int pnum,
 
 	buf1 = __vmalloc(len, GFP_NOFS, PAGE_KERNEL);
 	if (!buf1) {
-		ubi_err("cannot allocate memory to check writes");
+		ubi_err(ubi, "cannot allocate memory to check writes");
 		return 0;
 	}
 
@@ -1345,15 +1348,15 @@ static int self_check_write(struct ubi_device *ubi, const void *buf, int pnum,
 		if (c == c1)
 			continue;
 
-		ubi_err("self-check failed for PEB %d:%d, len %d",
+		ubi_err(ubi, "self-check failed for PEB %d:%d, len %d",
 			pnum, offset, len);
-		ubi_msg("data differ at position %d", i);
+		ubi_msg(ubi, "data differ at position %d", i);
 		dump_len = max_t(int, 128, len - i);
-		ubi_msg("hex dump of the original buffer from %d to %d",
+		ubi_msg(ubi, "hex dump of the original buffer from %d to %d",
 			i, i + dump_len);
 		print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
 			       buf + i, dump_len, 1);
-		ubi_msg("hex dump of the read buffer from %d to %d",
+		ubi_msg(ubi, "hex dump of the read buffer from %d to %d",
 			i, i + dump_len);
 		print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1,
 			       buf1 + i, dump_len, 1);
@@ -1393,20 +1396,20 @@ int ubi_self_check_all_ff(struct ubi_device *ubi, int pnum, int offset, int len)
 
 	buf = __vmalloc(len, GFP_NOFS, PAGE_KERNEL);
 	if (!buf) {
-		ubi_err("cannot allocate memory to check for 0xFFs");
+		ubi_err(ubi, "cannot allocate memory to check for 0xFFs");
 		return 0;
 	}
 
 	err = mtd_read(ubi->mtd, addr, len, &read, buf);
 	if (err && !mtd_is_bitflip(err)) {
-		ubi_err("error %d while reading %d bytes from PEB %d:%d, read %zd bytes",
+		ubi_err(ubi, "err %d while reading %d bytes from PEB %d:%d, read %zd bytes",
 			err, len, pnum, offset, read);
 		goto error;
 	}
 
 	err = ubi_check_pattern(buf, 0xFF, len);
 	if (err == 0) {
-		ubi_err("flash region at PEB %d:%d, length %d does not contain all 0xFF bytes",
+		ubi_err(ubi, "flash region at PEB %d:%d, length %d does not contain all 0xFF bytes",
 			pnum, offset, len);
 		goto fail;
 	}
@@ -1415,8 +1418,9 @@ int ubi_self_check_all_ff(struct ubi_device *ubi, int pnum, int offset, int len)
 	return 0;
 
 fail:
-	ubi_err("self-check failed for PEB %d", pnum);
-	ubi_msg("hex dump of the %d-%d region", offset, offset + len);
+	ubi_err(ubi, "self-check failed for PEB %d", pnum);
+	ubi_msg(ubi, "hex dump of the %d-%d region",
+		 offset, offset + len);
 	print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, buf, len, 1);
 	err = -EINVAL;
 error:
diff --git a/drivers/mtd/ubi/kapi.c b/drivers/mtd/ubi/kapi.c
index 3aac1acceeb4..f3bab669f6bb 100644
--- a/drivers/mtd/ubi/kapi.c
+++ b/drivers/mtd/ubi/kapi.c
@@ -204,7 +204,7 @@ struct ubi_volume_desc *ubi_open_volume(int ubi_num, int vol_id, int mode)
 			return ERR_PTR(err);
 		}
 		if (err == 1) {
-			ubi_warn("volume %d on UBI device %d is corrupted",
+			ubi_warn(ubi, "volume %d on UBI device %d is corrupted",
 				 vol_id, ubi->ubi_num);
 			vol->corrupted = 1;
 		}
@@ -221,7 +221,7 @@ out_free:
 	kfree(desc);
 out_put_ubi:
 	ubi_put_device(ubi);
-	ubi_err("cannot open device %d, volume %d, error %d",
+	ubi_err(ubi, "cannot open device %d, volume %d, error %d",
 		ubi_num, vol_id, err);
 	return ERR_PTR(err);
 }
@@ -411,7 +411,7 @@ int ubi_leb_read(struct ubi_volume_desc *desc, int lnum, char *buf, int offset,
 
 	err = ubi_eba_read_leb(ubi, vol, lnum, buf, offset, len, check);
 	if (err && mtd_is_eccerr(err) && vol->vol_type == UBI_STATIC_VOLUME) {
-		ubi_warn("mark volume %d as corrupted", vol_id);
+		ubi_warn(ubi, "mark volume %d as corrupted", vol_id);
 		vol->corrupted = 1;
 	}
 
diff --git a/drivers/mtd/ubi/misc.c b/drivers/mtd/ubi/misc.c
index f913d701a5b3..dbda77e556cb 100644
--- a/drivers/mtd/ubi/misc.c
+++ b/drivers/mtd/ubi/misc.c
@@ -111,7 +111,7 @@ void ubi_update_reserved(struct ubi_device *ubi)
 	ubi->avail_pebs -= need;
 	ubi->rsvd_pebs += need;
 	ubi->beb_rsvd_pebs += need;
-	ubi_msg("reserved more %d PEBs for bad PEB handling", need);
+	ubi_msg(ubi, "reserved more %d PEBs for bad PEB handling", need);
 }
 
 /**
@@ -128,7 +128,7 @@ void ubi_calculate_reserved(struct ubi_device *ubi)
 	ubi->beb_rsvd_level = ubi->bad_peb_limit - ubi->bad_peb_count;
 	if (ubi->beb_rsvd_level < 0) {
 		ubi->beb_rsvd_level = 0;
-		ubi_warn("number of bad PEBs (%d) is above the expected limit (%d), not reserving any PEBs for bad PEB handling, will use available PEBs (if any)",
+		ubi_warn(ubi, "number of bad PEBs (%d) is above the expected limit (%d), not reserving any PEBs for bad PEB handling, will use available PEBs (if any)",
 			 ubi->bad_peb_count, ubi->bad_peb_limit);
 	}
 }
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h
index 320fc38fa2a1..f80ffaba9058 100644
--- a/drivers/mtd/ubi/ubi.h
+++ b/drivers/mtd/ubi/ubi.h
@@ -50,13 +50,14 @@
 #define UBI_NAME_STR "ubi"
 
 /* Normal UBI messages */
-#define ubi_msg(fmt, ...) pr_notice("UBI: " fmt "\n", ##__VA_ARGS__)
+#define ubi_msg(ubi, fmt, ...) pr_notice("UBI-%d: %s:" fmt "\n", \
+					 ubi->ubi_num, __func__, ##__VA_ARGS__)
 /* UBI warning messages */
-#define ubi_warn(fmt, ...) pr_warn("UBI warning: %s: " fmt "\n",  \
-				   __func__, ##__VA_ARGS__)
+#define ubi_warn(ubi, fmt, ...) pr_warn("UBI-%d warning: %s: " fmt "\n", \
+					ubi->ubi_num, __func__, ##__VA_ARGS__)
 /* UBI error messages */
-#define ubi_err(fmt, ...) pr_err("UBI error: %s: " fmt "\n",      \
-				 __func__, ##__VA_ARGS__)
+#define ubi_err(ubi, fmt, ...) pr_err("UBI-%d error: %s: " fmt "\n", \
+				      ubi->ubi_num, __func__, ##__VA_ARGS__)
 
 /* Background thread name pattern */
 #define UBI_BGT_NAME_PATTERN "ubi_bgt%dd"
@@ -987,7 +988,7 @@ static inline void ubi_ro_mode(struct ubi_device *ubi)
 {
 	if (!ubi->ro_mode) {
 		ubi->ro_mode = 1;
-		ubi_warn("switch to read-only mode");
+		ubi_warn(ubi, "switch to read-only mode");
 		dump_stack();
 	}
 }
diff --git a/drivers/mtd/ubi/upd.c b/drivers/mtd/ubi/upd.c
index ec2c2dc1c1ca..2a1b6e037e1a 100644
--- a/drivers/mtd/ubi/upd.c
+++ b/drivers/mtd/ubi/upd.c
@@ -133,6 +133,10 @@ int ubi_start_update(struct ubi_device *ubi, struct ubi_volume *vol,
 	ubi_assert(!vol->updating && !vol->changing_leb);
 	vol->updating = 1;
 
+	vol->upd_buf = vmalloc(ubi->leb_size);
+	if (!vol->upd_buf)
+		return -ENOMEM;
+
 	err = set_update_marker(ubi, vol);
 	if (err)
 		return err;
@@ -152,14 +156,12 @@ int ubi_start_update(struct ubi_device *ubi, struct ubi_volume *vol,
 		err = clear_update_marker(ubi, vol, 0);
 		if (err)
 			return err;
+
+		vfree(vol->upd_buf);
 		vol->updating = 0;
 		return 0;
 	}
 
-	vol->upd_buf = vmalloc(ubi->leb_size);
-	if (!vol->upd_buf)
-		return -ENOMEM;
-
 	vol->upd_ebs = div_u64(bytes + vol->usable_leb_size - 1,
 			       vol->usable_leb_size);
 	vol->upd_bytes = bytes;
diff --git a/drivers/mtd/ubi/vmt.c b/drivers/mtd/ubi/vmt.c
index 8330703c098f..ff4d97848d1c 100644
--- a/drivers/mtd/ubi/vmt.c
+++ b/drivers/mtd/ubi/vmt.c
@@ -223,7 +223,7 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
 			}
 
 		if (vol_id == UBI_VOL_NUM_AUTO) {
-			ubi_err("out of volume IDs");
+			ubi_err(ubi, "out of volume IDs");
 			err = -ENFILE;
 			goto out_unlock;
 		}
@@ -237,7 +237,7 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
 	/* Ensure that this volume does not exist */
 	err = -EEXIST;
 	if (ubi->volumes[vol_id]) {
-		ubi_err("volume %d already exists", vol_id);
+		ubi_err(ubi, "volume %d already exists", vol_id);
 		goto out_unlock;
 	}
 
@@ -246,7 +246,8 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
 		if (ubi->volumes[i] &&
 		    ubi->volumes[i]->name_len == req->name_len &&
 		    !strcmp(ubi->volumes[i]->name, req->name)) {
-			ubi_err("volume \"%s\" exists (ID %d)", req->name, i);
+			ubi_err(ubi, "volume \"%s\" exists (ID %d)",
+				req->name, i);
 			goto out_unlock;
 		}
 
@@ -257,9 +258,10 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
 
 	/* Reserve physical eraseblocks */
 	if (vol->reserved_pebs > ubi->avail_pebs) {
-		ubi_err("not enough PEBs, only %d available", ubi->avail_pebs);
+		ubi_err(ubi, "not enough PEBs, only %d available",
+			ubi->avail_pebs);
 		if (ubi->corr_peb_count)
-			ubi_err("%d PEBs are corrupted and not used",
+			ubi_err(ubi, "%d PEBs are corrupted and not used",
 				ubi->corr_peb_count);
 		err = -ENOSPC;
 		goto out_unlock;
@@ -314,7 +316,7 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
 	dev = MKDEV(MAJOR(ubi->cdev.dev), vol_id + 1);
 	err = cdev_add(&vol->cdev, dev, 1);
 	if (err) {
-		ubi_err("cannot add character device");
+		ubi_err(ubi, "cannot add character device");
 		goto out_mapping;
 	}
 
@@ -326,7 +328,7 @@ int ubi_create_volume(struct ubi_device *ubi, struct ubi_mkvol_req *req)
 	dev_set_name(&vol->dev, "%s_%d", ubi->ubi_name, vol->vol_id);
 	err = device_register(&vol->dev);
 	if (err) {
-		ubi_err("cannot register device");
+		ubi_err(ubi, "cannot register device");
 		goto out_cdev;
 	}
 
@@ -386,7 +388,7 @@ out_unlock:
 		kfree(vol);
 	else
 		put_device(&vol->dev);
-	ubi_err("cannot create volume %d, error %d", vol_id, err);
+	ubi_err(ubi, "cannot create volume %d, error %d", vol_id, err);
 	return err;
 }
 
@@ -454,7 +456,7 @@ int ubi_remove_volume(struct ubi_volume_desc *desc, int no_vtbl)
 	return err;
 
 out_err:
-	ubi_err("cannot remove volume %d, error %d", vol_id, err);
+	ubi_err(ubi, "cannot remove volume %d, error %d", vol_id, err);
 	spin_lock(&ubi->volumes_lock);
 	ubi->volumes[vol_id] = vol;
 out_unlock:
@@ -487,7 +489,7 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
 
 	if (vol->vol_type == UBI_STATIC_VOLUME &&
 	    reserved_pebs < vol->used_ebs) {
-		ubi_err("too small size %d, %d LEBs contain data",
+		ubi_err(ubi, "too small size %d, %d LEBs contain data",
 			reserved_pebs, vol->used_ebs);
 		return -EINVAL;
 	}
@@ -516,10 +518,10 @@ int ubi_resize_volume(struct ubi_volume_desc *desc, int reserved_pebs)
 	if (pebs > 0) {
 		spin_lock(&ubi->volumes_lock);
 		if (pebs > ubi->avail_pebs) {
-			ubi_err("not enough PEBs: requested %d, available %d",
+			ubi_err(ubi, "not enough PEBs: requested %d, available %d",
 				pebs, ubi->avail_pebs);
 			if (ubi->corr_peb_count)
-				ubi_err("%d PEBs are corrupted and not used",
+				ubi_err(ubi, "%d PEBs are corrupted and not used",
 					ubi->corr_peb_count);
 			spin_unlock(&ubi->volumes_lock);
 			err = -ENOSPC;
@@ -643,7 +645,7 @@ int ubi_add_volume(struct ubi_device *ubi, struct ubi_volume *vol)
 	dev = MKDEV(MAJOR(ubi->cdev.dev), vol->vol_id + 1);
 	err = cdev_add(&vol->cdev, dev, 1);
 	if (err) {
-		ubi_err("cannot add character device for volume %d, error %d",
+		ubi_err(ubi, "cannot add character device for volume %d, error %d",
 			vol_id, err);
 		return err;
 	}
@@ -710,7 +712,7 @@ static int self_check_volume(struct ubi_device *ubi, int vol_id)
 
 	if (!vol) {
 		if (reserved_pebs) {
-			ubi_err("no volume info, but volume exists");
+			ubi_err(ubi, "no volume info, but volume exists");
 			goto fail;
 		}
 		spin_unlock(&ubi->volumes_lock);
@@ -719,90 +721,91 @@ static int self_check_volume(struct ubi_device *ubi, int vol_id)
 
 	if (vol->reserved_pebs < 0 || vol->alignment < 0 || vol->data_pad < 0 ||
 	    vol->name_len < 0) {
-		ubi_err("negative values");
+		ubi_err(ubi, "negative values");
 		goto fail;
 	}
 	if (vol->alignment > ubi->leb_size || vol->alignment == 0) {
-		ubi_err("bad alignment");
+		ubi_err(ubi, "bad alignment");
 		goto fail;
 	}
 
 	n = vol->alignment & (ubi->min_io_size - 1);
 	if (vol->alignment != 1 && n) {
-		ubi_err("alignment is not multiple of min I/O unit");
+		ubi_err(ubi, "alignment is not multiple of min I/O unit");
 		goto fail;
 	}
 
 	n = ubi->leb_size % vol->alignment;
 	if (vol->data_pad != n) {
-		ubi_err("bad data_pad, has to be %lld", n);
+		ubi_err(ubi, "bad data_pad, has to be %lld", n);
 		goto fail;
 	}
 
 	if (vol->vol_type != UBI_DYNAMIC_VOLUME &&
 	    vol->vol_type != UBI_STATIC_VOLUME) {
-		ubi_err("bad vol_type");
+		ubi_err(ubi, "bad vol_type");
 		goto fail;
 	}
 
 	if (vol->upd_marker && vol->corrupted) {
-		ubi_err("update marker and corrupted simultaneously");
+		ubi_err(ubi, "update marker and corrupted simultaneously");
 		goto fail;
 	}
 
 	if (vol->reserved_pebs > ubi->good_peb_count) {
-		ubi_err("too large reserved_pebs");
+		ubi_err(ubi, "too large reserved_pebs");
 		goto fail;
 	}
 
 	n = ubi->leb_size - vol->data_pad;
 	if (vol->usable_leb_size != ubi->leb_size - vol->data_pad) {
-		ubi_err("bad usable_leb_size, has to be %lld", n);
+		ubi_err(ubi, "bad usable_leb_size, has to be %lld", n);
 		goto fail;
 	}
 
 	if (vol->name_len > UBI_VOL_NAME_MAX) {
-		ubi_err("too long volume name, max is %d", UBI_VOL_NAME_MAX);
+		ubi_err(ubi, "too long volume name, max is %d",
+			UBI_VOL_NAME_MAX);
 		goto fail;
 	}
 
 	n = strnlen(vol->name, vol->name_len + 1);
 	if (n != vol->name_len) {
-		ubi_err("bad name_len %lld", n);
+		ubi_err(ubi, "bad name_len %lld", n);
 		goto fail;
 	}
 
 	n = (long long)vol->used_ebs * vol->usable_leb_size;
 	if (vol->vol_type == UBI_DYNAMIC_VOLUME) {
 		if (vol->corrupted) {
-			ubi_err("corrupted dynamic volume");
+			ubi_err(ubi, "corrupted dynamic volume");
 			goto fail;
 		}
 		if (vol->used_ebs != vol->reserved_pebs) {
-			ubi_err("bad used_ebs");
+			ubi_err(ubi, "bad used_ebs");
 			goto fail;
 		}
 		if (vol->last_eb_bytes != vol->usable_leb_size) {
-			ubi_err("bad last_eb_bytes");
+			ubi_err(ubi, "bad last_eb_bytes");
 			goto fail;
 		}
 		if (vol->used_bytes != n) {
-			ubi_err("bad used_bytes");
+			ubi_err(ubi, "bad used_bytes");
 			goto fail;
 		}
 	} else {
 		if (vol->used_ebs < 0 || vol->used_ebs > vol->reserved_pebs) {
-			ubi_err("bad used_ebs");
+			ubi_err(ubi, "bad used_ebs");
 			goto fail;
 		}
 		if (vol->last_eb_bytes < 0 ||
 		    vol->last_eb_bytes > vol->usable_leb_size) {
-			ubi_err("bad last_eb_bytes");
+			ubi_err(ubi, "bad last_eb_bytes");
 			goto fail;
 		}
 		if (vol->used_bytes < 0 || vol->used_bytes > n ||
 		    vol->used_bytes < n - vol->usable_leb_size) {
-			ubi_err("bad used_bytes");
+			ubi_err(ubi, "bad used_bytes");
 			goto fail;
 		}
 	}
@@ -820,7 +823,7 @@ static int self_check_volume(struct ubi_device *ubi, int vol_id)
 	if (alignment != vol->alignment || data_pad != vol->data_pad ||
 	    upd_marker != vol->upd_marker || vol_type != vol->vol_type ||
 	    name_len != vol->name_len || strncmp(name, vol->name, name_len)) {
-		ubi_err("volume info is different");
+		ubi_err(ubi, "volume info is different");
 		goto fail;
 	}
 
@@ -828,7 +831,7 @@ static int self_check_volume(struct ubi_device *ubi, int vol_id)
 	return 0;
 
 fail:
-	ubi_err("self-check failed for volume %d", vol_id);
+	ubi_err(ubi, "self-check failed for volume %d", vol_id);
 	if (vol)
 		ubi_dump_vol_info(vol);
 	ubi_dump_vtbl_record(&ubi->vtbl[vol_id], vol_id);
diff --git a/drivers/mtd/ubi/vtbl.c b/drivers/mtd/ubi/vtbl.c
index 07cac5f9ffb8..f8fc3081bbb4 100644
--- a/drivers/mtd/ubi/vtbl.c
+++ b/drivers/mtd/ubi/vtbl.c
@@ -30,9 +30,12 @@
  * eraseblock stores one volume table copy, i.e. LEB 0 and LEB 1 duplicate each
  * other. This redundancy guarantees robustness to unclean reboots. The volume
  * table is basically an array of volume table records. Each record contains
- * full information about the volume and protected by a CRC checksum.
+ * full information about the volume and protected by a CRC checksum. Note,
+ * nowadays we use the atomic LEB change operation when updating the volume
+ * table, so we do not really need 2 LEBs anymore, but we preserve the older
+ * design for the backward compatibility reasons.
  *
- * The volume table is changed, it is first changed in RAM. Then LEB 0 is
+ * When the volume table is changed, it is first changed in RAM. Then LEB 0 is
  * erased, and the updated volume table is written back to LEB 0. Then same for
  * LEB 1. This scheme guarantees recoverability from unclean reboots.
  *
@@ -96,12 +99,8 @@ int ubi_change_vtbl_record(struct ubi_device *ubi, int idx,
 
 	memcpy(&ubi->vtbl[idx], vtbl_rec, sizeof(struct ubi_vtbl_record));
 	for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) {
-		err = ubi_eba_unmap_leb(ubi, layout_vol, i);
-		if (err)
-			return err;
-
-		err = ubi_eba_write_leb(ubi, layout_vol, i, ubi->vtbl, 0,
-					ubi->vtbl_size);
+		err = ubi_eba_atomic_leb_change(ubi, layout_vol, i, ubi->vtbl,
+						ubi->vtbl_size);
 		if (err)
 			return err;
 	}
@@ -148,12 +147,8 @@ int ubi_vtbl_rename_volumes(struct ubi_device *ubi,
 
 	layout_vol = ubi->volumes[vol_id2idx(ubi, UBI_LAYOUT_VOLUME_ID)];
 	for (i = 0; i < UBI_LAYOUT_VOLUME_EBS; i++) {
-		err = ubi_eba_unmap_leb(ubi, layout_vol, i);
-		if (err)
-			return err;
-
-		err = ubi_eba_write_leb(ubi, layout_vol, i, ubi->vtbl, 0,
-					ubi->vtbl_size);
+		err = ubi_eba_atomic_leb_change(ubi, layout_vol, i, ubi->vtbl,
+						ubi->vtbl_size);
 		if (err)
 			return err;
 	}
@@ -190,7 +185,7 @@ static int vtbl_check(const struct ubi_device *ubi,
 
 		crc = crc32(UBI_CRC32_INIT, &vtbl[i], UBI_VTBL_RECORD_SIZE_CRC);
 		if (be32_to_cpu(vtbl[i].crc) != crc) {
-			ubi_err("bad CRC at record %u: %#08x, not %#08x",
+			ubi_err(ubi, "bad CRC at record %u: %#08x, not %#08x",
 				 i, crc, be32_to_cpu(vtbl[i].crc));
 			ubi_dump_vtbl_record(&vtbl[i], i);
 			return 1;
@@ -224,7 +219,7 @@ static int vtbl_check(const struct ubi_device *ubi,
 
 		n = ubi->leb_size % alignment;
 		if (data_pad != n) {
-			ubi_err("bad data_pad, has to be %d", n);
+			ubi_err(ubi, "bad data_pad, has to be %d", n);
 			err = 6;
 			goto bad;
 		}
@@ -240,7 +235,7 @@ static int vtbl_check(const struct ubi_device *ubi,
 		}
 
 		if (reserved_pebs > ubi->good_peb_count) {
-			ubi_err("too large reserved_pebs %d, good PEBs %d",
+			ubi_err(ubi, "too large reserved_pebs %d, good PEBs %d",
 				reserved_pebs, ubi->good_peb_count);
 			err = 9;
 			goto bad;
@@ -270,7 +265,7 @@ static int vtbl_check(const struct ubi_device *ubi,
 
 			if (len1 > 0 && len1 == len2 &&
 			    !strncmp(vtbl[i].name, vtbl[n].name, len1)) {
-				ubi_err("volumes %d and %d have the same name \"%s\"",
+				ubi_err(ubi, "volumes %d and %d have the same name \"%s\"",
 					i, n, vtbl[i].name);
 				ubi_dump_vtbl_record(&vtbl[i], i);
 				ubi_dump_vtbl_record(&vtbl[n], n);
@@ -282,7 +277,7 @@ static int vtbl_check(const struct ubi_device *ubi,
 	return 0;
 
 bad:
-	ubi_err("volume table check failed: record %d, error %d", i, err);
+	ubi_err(ubi, "volume table check failed: record %d, error %d", i, err);
 	ubi_dump_vtbl_record(&vtbl[i], i);
 	return -EINVAL;
 }
@@ -446,11 +441,11 @@ static struct ubi_vtbl_record *process_lvol(struct ubi_device *ubi,
 			leb_corrupted[1] = memcmp(leb[0], leb[1],
 						  ubi->vtbl_size);
 		if (leb_corrupted[1]) {
-			ubi_warn("volume table copy #2 is corrupted");
+			ubi_warn(ubi, "volume table copy #2 is corrupted");
 			err = create_vtbl(ubi, ai, 1, leb[0]);
 			if (err)
 				goto out_free;
-			ubi_msg("volume table was restored");
+			ubi_msg(ubi, "volume table was restored");
 		}
 
 		/* Both LEB 1 and LEB 2 are OK and consistent */
@@ -465,15 +460,15 @@ static struct ubi_vtbl_record *process_lvol(struct ubi_device *ubi,
 		}
 		if (leb_corrupted[1]) {
 			/* Both LEB 0 and LEB 1 are corrupted */
-			ubi_err("both volume tables are corrupted");
+			ubi_err(ubi, "both volume tables are corrupted");
 			goto out_free;
 		}
 
-		ubi_warn("volume table copy #1 is corrupted");
+		ubi_warn(ubi, "volume table copy #1 is corrupted");
 		err = create_vtbl(ubi, ai, 0, leb[1]);
 		if (err)
 			goto out_free;
-		ubi_msg("volume table was restored");
+		ubi_msg(ubi, "volume table was restored");
 
 		vfree(leb[0]);
 		return leb[1];
@@ -562,7 +557,7 @@ static int init_volumes(struct ubi_device *ubi,
 		if (vtbl[i].flags & UBI_VTBL_AUTORESIZE_FLG) {
 			/* Auto re-size flag may be set only for one volume */
 			if (ubi->autoresize_vol_id != -1) {
-				ubi_err("more than one auto-resize volume (%d and %d)",
+				ubi_err(ubi, "more than one auto-resize volume (%d and %d)",
 					ubi->autoresize_vol_id, i);
 				kfree(vol);
 				return -EINVAL;
@@ -608,7 +603,7 @@ static int init_volumes(struct ubi_device *ubi,
 			 * We found a static volume which misses several
 			 * eraseblocks. Treat it as corrupted.
 			 */
-			ubi_warn("static volume %d misses %d LEBs - corrupted",
+			ubi_warn(ubi, "static volume %d misses %d LEBs - corrupted",
 				 av->vol_id, av->used_ebs - av->leb_count);
 			vol->corrupted = 1;
 			continue;
@@ -646,10 +641,10 @@ static int init_volumes(struct ubi_device *ubi,
 	vol->ubi = ubi;
 
 	if (reserved_pebs > ubi->avail_pebs) {
-		ubi_err("not enough PEBs, required %d, available %d",
+		ubi_err(ubi, "not enough PEBs, required %d, available %d",
 			reserved_pebs, ubi->avail_pebs);
 		if (ubi->corr_peb_count)
-			ubi_err("%d PEBs are corrupted and not used",
+			ubi_err(ubi, "%d PEBs are corrupted and not used",
 				ubi->corr_peb_count);
 	}
 	ubi->rsvd_pebs += reserved_pebs;
@@ -660,13 +655,14 @@ static int init_volumes(struct ubi_device *ubi,
 
 /**
  * check_av - check volume attaching information.
+ * @ubi: UBI device description object
  * @vol: UBI volume description object
  * @av: volume attaching information
  *
  * This function returns zero if the volume attaching information is consistent
  * to the data read from the volume tabla, and %-EINVAL if not.
  */
-static int check_av(const struct ubi_volume *vol,
+static int check_av(const struct ubi_device *ubi, const struct ubi_volume *vol,
 		    const struct ubi_ainf_volume *av)
 {
 	int err;
@@ -694,7 +690,7 @@ static int check_av(const struct ubi_volume *vol,
 	return 0;
 
 bad:
-	ubi_err("bad attaching information, error %d", err);
+	ubi_err(ubi, "bad attaching information, error %d", err);
 	ubi_dump_av(av);
 	ubi_dump_vol_info(vol);
 	return -EINVAL;
@@ -718,14 +714,15 @@ static int check_attaching_info(const struct ubi_device *ubi,
 	struct ubi_volume *vol;
 
 	if (ai->vols_found > UBI_INT_VOL_COUNT + ubi->vtbl_slots) {
-		ubi_err("found %d volumes while attaching, maximum is %d + %d",
+		ubi_err(ubi, "found %d volumes while attaching, maximum is %d + %d",
 			ai->vols_found, UBI_INT_VOL_COUNT, ubi->vtbl_slots);
 		return -EINVAL;
 	}
 
 	if (ai->highest_vol_id >= ubi->vtbl_slots + UBI_INT_VOL_COUNT &&
 	    ai->highest_vol_id < UBI_INTERNAL_VOL_START) {
-		ubi_err("too large volume ID %d found", ai->highest_vol_id);
+		ubi_err(ubi, "too large volume ID %d found",
+			ai->highest_vol_id);
 		return -EINVAL;
 	}
 
@@ -753,10 +750,10 @@ static int check_attaching_info(const struct ubi_device *ubi,
 			 * reboot while the volume was being removed. Discard
 			 * these eraseblocks.
 			 */
-			ubi_msg("finish volume %d removal", av->vol_id);
+			ubi_msg(ubi, "finish volume %d removal", av->vol_id);
 			ubi_remove_av(ai, av);
 		} else if (av) {
-			err = check_av(vol, av);
+			err = check_av(ubi, vol, av);
 			if (err)
 				return err;
 		}
@@ -807,13 +804,13 @@ int ubi_read_volume_table(struct ubi_device *ubi, struct ubi_attach_info *ai)
 			if (IS_ERR(ubi->vtbl))
 				return PTR_ERR(ubi->vtbl);
 		} else {
-			ubi_err("the layout volume was not found");
+			ubi_err(ubi, "the layout volume was not found");
 			return -EINVAL;
 		}
 	} else {
 		if (av->leb_count > UBI_LAYOUT_VOLUME_EBS) {
 			/* This must not happen with proper UBI images */
-			ubi_err("too many LEBs (%d) in layout volume",
+			ubi_err(ubi, "too many LEBs (%d) in layout volume",
 				av->leb_count);
 			return -EINVAL;
 		}
@@ -862,7 +859,7 @@ static void self_vtbl_check(const struct ubi_device *ubi)
 		return;
 
 	if (vtbl_check(ubi, ubi->vtbl)) {
-		ubi_err("self-check failed");
+		ubi_err(ubi, "self-check failed");
 		BUG();
 	}
 }
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index 6654f191868e..834f6fe1f5fa 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -253,7 +253,7 @@ static int do_work(struct ubi_device *ubi)
 	 */
 	err = wrk->func(ubi, wrk, 0);
 	if (err)
-		ubi_err("work failed with error code %d", err);
+		ubi_err(ubi, "work failed with error code %d", err);
 	up_read(&ubi->work_sem);
 
 	return err;
@@ -470,8 +470,11 @@ struct ubi_wl_entry *ubi_wl_get_fm_peb(struct ubi_device *ubi, int anchor)
 {
 	struct ubi_wl_entry *e = NULL;
 
-	if (!ubi->free.rb_node || (ubi->free_count - ubi->beb_rsvd_pebs < 1))
+	if (!ubi->free.rb_node || (ubi->free_count - ubi->beb_rsvd_pebs < 1)) {
+		ubi_warn(ubi, "Can't get peb for fastmap:anchor=%d, free_cnt=%d, reserved=%d",
+			 anchor, ubi->free_count, ubi->beb_rsvd_pebs);
 		goto out;
+	}
 
 	if (anchor)
 		e = find_anchor_wl_entry(&ubi->free);
@@ -507,7 +510,7 @@ static int __wl_get_peb(struct ubi_device *ubi)
 retry:
 	if (!ubi->free.rb_node) {
 		if (ubi->works_count == 0) {
-			ubi_err("no free eraseblocks");
+			ubi_err(ubi, "no free eraseblocks");
 			ubi_assert(list_empty(&ubi->works));
 			return -ENOSPC;
 		}
@@ -520,7 +523,7 @@ retry:
 
 	e = find_mean_wl_entry(ubi, &ubi->free);
 	if (!e) {
-		ubi_err("no free eraseblocks");
+		ubi_err(ubi, "no free eraseblocks");
 		return -ENOSPC;
 	}
 
@@ -692,7 +695,8 @@ int ubi_wl_get_peb(struct ubi_device *ubi)
 	err = ubi_self_check_all_ff(ubi, peb, ubi->vid_hdr_aloffset,
 				    ubi->peb_size - ubi->vid_hdr_aloffset);
 	if (err) {
-		ubi_err("new PEB %d does not contain all 0xFF bytes", peb);
+		ubi_err(ubi, "new PEB %d does not contain all 0xFF bytes",
+			peb);
 		return err;
 	}
 
@@ -760,7 +764,7 @@ static int sync_erase(struct ubi_device *ubi, struct ubi_wl_entry *e,
 		 * Erase counter overflow. Upgrade UBI and use 64-bit
 		 * erase counters internally.
 		 */
-		ubi_err("erase counter overflow at PEB %d, EC %llu",
+		ubi_err(ubi, "erase counter overflow at PEB %d, EC %llu",
 			e->pnum, ec);
 		err = -EINVAL;
 		goto out_free;
@@ -1137,7 +1141,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
 			goto out_not_moved;
 		}
 
-		ubi_err("error %d while reading VID header from PEB %d",
+		ubi_err(ubi, "error %d while reading VID header from PEB %d",
 			err, e1->pnum);
 		goto out_error;
 	}
@@ -1181,7 +1185,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
 			 * UBI from trying to move it over and over again.
 			 */
 			if (ubi->erroneous_peb_count > ubi->max_erroneous) {
-				ubi_err("too many erroneous eraseblocks (%d)",
+				ubi_err(ubi, "too many erroneous eraseblocks (%d)",
 					ubi->erroneous_peb_count);
 				goto out_error;
 			}
@@ -1197,7 +1201,7 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
 
 	/* The PEB has been successfully moved */
 	if (scrubbing)
-		ubi_msg("scrubbed PEB %d (LEB %d:%d), data moved to PEB %d",
+		ubi_msg(ubi, "scrubbed PEB %d (LEB %d:%d), data moved to PEB %d",
 			e1->pnum, vol_id, lnum, e2->pnum);
 	ubi_free_vid_hdr(ubi, vid_hdr);
 
@@ -1212,7 +1216,6 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
 
 	err = do_sync_erase(ubi, e1, vol_id, lnum, 0);
 	if (err) {
-		kmem_cache_free(ubi_wl_entry_slab, e1);
 		if (e2)
 			kmem_cache_free(ubi_wl_entry_slab, e2);
 		goto out_ro;
@@ -1226,10 +1229,8 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
 		dbg_wl("PEB %d (LEB %d:%d) was put meanwhile, erase",
 		       e2->pnum, vol_id, lnum);
 		err = do_sync_erase(ubi, e2, vol_id, lnum, 0);
-		if (err) {
-			kmem_cache_free(ubi_wl_entry_slab, e2);
+		if (err)
 			goto out_ro;
-		}
 	}
 
 	dbg_wl("done");
@@ -1265,19 +1266,18 @@ out_not_moved:
 
 	ubi_free_vid_hdr(ubi, vid_hdr);
 	err = do_sync_erase(ubi, e2, vol_id, lnum, torture);
-	if (err) {
-		kmem_cache_free(ubi_wl_entry_slab, e2);
+	if (err)
 		goto out_ro;
-	}
+
 	mutex_unlock(&ubi->move_mutex);
 	return 0;
 
 out_error:
 	if (vol_id != -1)
-		ubi_err("error %d while moving PEB %d to PEB %d",
+		ubi_err(ubi, "error %d while moving PEB %d to PEB %d",
 			err, e1->pnum, e2->pnum);
 	else
-		ubi_err("error %d while moving PEB %d (LEB %d:%d) to PEB %d",
+		ubi_err(ubi, "error %d while moving PEB %d (LEB %d:%d) to PEB %d",
 			err, e1->pnum, vol_id, lnum, e2->pnum);
 	spin_lock(&ubi->wl_lock);
 	ubi->move_from = ubi->move_to = NULL;
@@ -1458,7 +1458,7 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
 		return err;
 	}
 
-	ubi_err("failed to erase PEB %d, error %d", pnum, err);
+	ubi_err(ubi, "failed to erase PEB %d, error %d", pnum, err);
 	kfree(wl_wrk);
 
 	if (err == -EINTR || err == -ENOMEM || err == -EAGAIN ||
@@ -1486,7 +1486,7 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
 	/* It is %-EIO, the PEB went bad */
 
 	if (!ubi->bad_allowed) {
-		ubi_err("bad physical eraseblock %d detected", pnum);
+		ubi_err(ubi, "bad physical eraseblock %d detected", pnum);
 		goto out_ro;
 	}
 
@@ -1494,7 +1494,7 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
 	if (ubi->beb_rsvd_pebs == 0) {
 		if (ubi->avail_pebs == 0) {
 			spin_unlock(&ubi->volumes_lock);
-			ubi_err("no reserved/available physical eraseblocks");
+			ubi_err(ubi, "no reserved/available physical eraseblocks");
 			goto out_ro;
 		}
 		ubi->avail_pebs -= 1;
@@ -1502,7 +1502,7 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
 	}
 	spin_unlock(&ubi->volumes_lock);
 
-	ubi_msg("mark PEB %d as bad", pnum);
+	ubi_msg(ubi, "mark PEB %d as bad", pnum);
 	err = ubi_io_mark_bad(ubi, pnum);
 	if (err)
 		goto out_ro;
@@ -1523,11 +1523,12 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
 	ubi->good_peb_count -= 1;
 	ubi_calculate_reserved(ubi);
 	if (available_consumed)
-		ubi_warn("no PEBs in the reserved pool, used an available PEB");
+		ubi_warn(ubi, "no PEBs in the reserved pool, used an available PEB");
 	else if (ubi->beb_rsvd_pebs)
-		ubi_msg("%d PEBs left in the reserve", ubi->beb_rsvd_pebs);
+		ubi_msg(ubi, "%d PEBs left in the reserve",
+			ubi->beb_rsvd_pebs);
 	else
-		ubi_warn("last PEB from the reserve was used");
+		ubi_warn(ubi, "last PEB from the reserve was used");
 	spin_unlock(&ubi->volumes_lock);
 
 	return err;
@@ -1613,7 +1614,7 @@ retry:
 		} else {
 			err = prot_queue_del(ubi, e->pnum);
 			if (err) {
-				ubi_err("PEB %d not found", pnum);
+				ubi_err(ubi, "PEB %d not found", pnum);
 				ubi_ro_mode(ubi);
 				spin_unlock(&ubi->wl_lock);
 				return err;
@@ -1646,7 +1647,7 @@ int ubi_wl_scrub_peb(struct ubi_device *ubi, int pnum)
 {
 	struct ubi_wl_entry *e;
 
-	ubi_msg("schedule PEB %d for scrubbing", pnum);
+	ubi_msg(ubi, "schedule PEB %d for scrubbing", pnum);
 
 retry:
 	spin_lock(&ubi->wl_lock);
@@ -1678,7 +1679,7 @@ retry:
 
 		err = prot_queue_del(ubi, e->pnum);
 		if (err) {
-			ubi_err("PEB %d not found", pnum);
+			ubi_err(ubi, "PEB %d not found", pnum);
 			ubi_ro_mode(ubi);
 			spin_unlock(&ubi->wl_lock);
 			return err;
@@ -1798,15 +1799,18 @@ int ubi_thread(void *u)
 	int failures = 0;
 	struct ubi_device *ubi = u;
 
-	ubi_msg("background thread \"%s\" started, PID %d",
+	ubi_msg(ubi, "background thread \"%s\" started, PID %d",
 		ubi->bgt_name, task_pid_nr(current));
 
 	set_freezable();
 	for (;;) {
 		int err;
 
-		if (kthread_should_stop())
+		if (kthread_should_stop()) {
+			ubi_msg(ubi, "background thread \"%s\" should stop, PID %d",
+				ubi->bgt_name, task_pid_nr(current));
 			break;
+		}
 
 		if (try_to_freeze())
 			continue;
@@ -1823,14 +1827,14 @@ int ubi_thread(void *u)
 
 		err = do_work(ubi);
 		if (err) {
-			ubi_err("%s: work failed with error code %d",
+			ubi_err(ubi, "%s: work failed with error code %d",
 				ubi->bgt_name, err);
 			if (failures++ > WL_MAX_FAILURES) {
 				/*
 				 * Too many failures, disable the thread and
 				 * switch to read-only mode.
 				 */
-				ubi_msg("%s: %d consecutive failures",
+				ubi_msg(ubi, "%s: %d consecutive failures",
 					ubi->bgt_name, WL_MAX_FAILURES);
 				ubi_ro_mode(ubi);
 				ubi->thread_enabled = 0;
@@ -1981,10 +1985,10 @@ int ubi_wl_init(struct ubi_device *ubi, struct ubi_attach_info *ai)
 #endif
 
 	if (ubi->avail_pebs < reserved_pebs) {
-		ubi_err("no enough physical eraseblocks (%d, need %d)",
+		ubi_err(ubi, "no enough physical eraseblocks (%d, need %d)",
 			ubi->avail_pebs, reserved_pebs);
 		if (ubi->corr_peb_count)
-			ubi_err("%d PEBs are corrupted and not used",
+			ubi_err(ubi, "%d PEBs are corrupted and not used",
 				ubi->corr_peb_count);
 		goto out_free;
 	}
@@ -2072,8 +2076,8 @@ static int self_check_ec(struct ubi_device *ubi, int pnum, int ec)
 
 	read_ec = be64_to_cpu(ec_hdr->ec);
 	if (ec != read_ec && read_ec - ec > 1) {
-		ubi_err("self-check failed for PEB %d", pnum);
-		ubi_err("read EC is %lld, should be %d", read_ec, ec);
+		ubi_err(ubi, "self-check failed for PEB %d", pnum);
+		ubi_err(ubi, "read EC is %lld, should be %d", read_ec, ec);
 		dump_stack();
 		err = 1;
 	} else
@@ -2102,7 +2106,7 @@ static int self_check_in_wl_tree(const struct ubi_device *ubi,
 	if (in_wl_tree(e, root))
 		return 0;
 
-	ubi_err("self-check failed for PEB %d, EC %d, RB-tree %p ",
+	ubi_err(ubi, "self-check failed for PEB %d, EC %d, RB-tree %p ",
 		e->pnum, e->ec, root);
 	dump_stack();
 	return -EINVAL;
@@ -2130,7 +2134,7 @@ static int self_check_in_pq(const struct ubi_device *ubi,
 			if (p == e)
 				return 0;
 
-	ubi_err("self-check failed for PEB %d, EC %d, Protect queue",
+	ubi_err(ubi, "self-check failed for PEB %d, EC %d, Protect queue",
 		e->pnum, e->ec);
 	dump_stack();
 	return -EINVAL;