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| author | Taras Kondratiuk <takondra@cisco.com> | 2016-07-13 22:05:38 +0000 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2016-08-19 09:50:57 +0200 |
| commit | 45fabee60c60bf8cd7f3b3b023c69e56744f6828 (patch) | |
| tree | 9b5d8658145761df2b886a015717fed32f1ebebb | |
| parent | 1d0f1ab1f99ac506ed35428fc21818727bf96278 (diff) | |
| download | lwn-45fabee60c60bf8cd7f3b3b023c69e56744f6828.tar.gz lwn-45fabee60c60bf8cd7f3b3b023c69e56744f6828.zip | |
mmc: block: fix packed command header endianness
commit f68381a70bb2b26c31b13fdaf67c778f92fd32b4 upstream.
The code that fills packed command header assumes that CPU runs in
little-endian mode. Hence the header is malformed in big-endian mode
and causes MMC data transfer errors:
[ 563.200828] mmcblk0: error -110 transferring data, sector 2048, nr 8, cmd response 0x900, card status 0xc40
[ 563.219647] mmcblk0: packed cmd failed, nr 2, sectors 16, failure index: -1
Convert header data to LE.
Signed-off-by: Taras Kondratiuk <takondra@cisco.com>
Fixes: ce39f9d17c14 ("mmc: support packed write command for eMMC4.5 devices")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
| -rw-r--r-- | drivers/mmc/card/block.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index ee76ff2af935..0405fba9f7a8 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -1610,8 +1610,8 @@ static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq, packed_cmd_hdr = packed->cmd_hdr; memset(packed_cmd_hdr, 0, sizeof(packed->cmd_hdr)); - packed_cmd_hdr[0] = (packed->nr_entries << 16) | - (PACKED_CMD_WR << 8) | PACKED_CMD_VER; + packed_cmd_hdr[0] = cpu_to_le32((packed->nr_entries << 16) | + (PACKED_CMD_WR << 8) | PACKED_CMD_VER); hdr_blocks = mmc_large_sector(card) ? 8 : 1; /* @@ -1625,14 +1625,14 @@ static void mmc_blk_packed_hdr_wrq_prep(struct mmc_queue_req *mqrq, ((brq->data.blocks * brq->data.blksz) >= card->ext_csd.data_tag_unit_size); /* Argument of CMD23 */ - packed_cmd_hdr[(i * 2)] = + packed_cmd_hdr[(i * 2)] = cpu_to_le32( (do_rel_wr ? MMC_CMD23_ARG_REL_WR : 0) | (do_data_tag ? MMC_CMD23_ARG_TAG_REQ : 0) | - blk_rq_sectors(prq); + blk_rq_sectors(prq)); /* Argument of CMD18 or CMD25 */ - packed_cmd_hdr[((i * 2)) + 1] = + packed_cmd_hdr[((i * 2)) + 1] = cpu_to_le32( mmc_card_blockaddr(card) ? - blk_rq_pos(prq) : blk_rq_pos(prq) << 9; + blk_rq_pos(prq) : blk_rq_pos(prq) << 9); packed->blocks += blk_rq_sectors(prq); i++; } |