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Diffstat (limited to 'block')
-rw-r--r--block/blk-core.c41
-rw-r--r--block/blk-map.c7
-rw-r--r--block/cfq-iosched.c16
-rw-r--r--block/genhd.c71
4 files changed, 40 insertions, 95 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index f43c8a5840ae..15de223c7f93 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -366,7 +366,14 @@ void blk_drain_queue(struct request_queue *q, bool drain_all)
if (drain_all)
blk_throtl_drain(q);
- __blk_run_queue(q);
+ /*
+ * This function might be called on a queue which failed
+ * driver init after queue creation. Some drivers
+ * (e.g. fd) get unhappy in such cases. Kick queue iff
+ * dispatch queue has something on it.
+ */
+ if (!list_empty(&q->queue_head))
+ __blk_run_queue(q);
if (drain_all)
nr_rqs = q->rq.count[0] + q->rq.count[1];
@@ -467,6 +474,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
q->backing_dev_info.state = 0;
q->backing_dev_info.capabilities = BDI_CAP_MAP_COPY;
q->backing_dev_info.name = "block";
+ q->node = node_id;
err = bdi_init(&q->backing_dev_info);
if (err) {
@@ -551,7 +559,7 @@ blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id)
if (!uninit_q)
return NULL;
- q = blk_init_allocated_queue_node(uninit_q, rfn, lock, node_id);
+ q = blk_init_allocated_queue(uninit_q, rfn, lock);
if (!q)
blk_cleanup_queue(uninit_q);
@@ -563,18 +571,9 @@ struct request_queue *
blk_init_allocated_queue(struct request_queue *q, request_fn_proc *rfn,
spinlock_t *lock)
{
- return blk_init_allocated_queue_node(q, rfn, lock, -1);
-}
-EXPORT_SYMBOL(blk_init_allocated_queue);
-
-struct request_queue *
-blk_init_allocated_queue_node(struct request_queue *q, request_fn_proc *rfn,
- spinlock_t *lock, int node_id)
-{
if (!q)
return NULL;
- q->node = node_id;
if (blk_init_free_list(q))
return NULL;
@@ -604,7 +603,7 @@ blk_init_allocated_queue_node(struct request_queue *q, request_fn_proc *rfn,
return NULL;
}
-EXPORT_SYMBOL(blk_init_allocated_queue_node);
+EXPORT_SYMBOL(blk_init_allocated_queue);
int blk_get_queue(struct request_queue *q)
{
@@ -1379,15 +1378,19 @@ get_rq:
*/
if (list_empty(&plug->list))
trace_block_plug(q);
- else if (!plug->should_sort) {
- struct request *__rq;
+ else {
+ if (!plug->should_sort) {
+ struct request *__rq;
- __rq = list_entry_rq(plug->list.prev);
- if (__rq->q != q)
- plug->should_sort = 1;
+ __rq = list_entry_rq(plug->list.prev);
+ if (__rq->q != q)
+ plug->should_sort = 1;
+ }
+ if (request_count >= BLK_MAX_REQUEST_COUNT) {
+ blk_flush_plug_list(plug, false);
+ trace_block_plug(q);
+ }
}
- if (request_count >= BLK_MAX_REQUEST_COUNT)
- blk_flush_plug_list(plug, false);
list_add_tail(&req->queuelist, &plug->list);
drive_stat_acct(req, 1);
} else {
diff --git a/block/blk-map.c b/block/blk-map.c
index e663ac2d8e68..164cd0059706 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -204,10 +204,11 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
if (!iov[i].iov_len)
return -EINVAL;
- if (uaddr & queue_dma_alignment(q)) {
+ /*
+ * Keep going so we check length of all segments
+ */
+ if (uaddr & queue_dma_alignment(q))
unaligned = 1;
- break;
- }
}
if (unaligned || (q->dma_pad_mask & len) || map_data)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 16ace89613bc..4c12869fcf77 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -3184,7 +3184,7 @@ static int cfq_cic_link(struct cfq_data *cfqd, struct io_context *ioc,
}
}
- if (ret)
+ if (ret && ret != -EEXIST)
printk(KERN_ERR "cfq: cic link failed!\n");
return ret;
@@ -3200,6 +3200,7 @@ cfq_get_io_context(struct cfq_data *cfqd, gfp_t gfp_mask)
{
struct io_context *ioc = NULL;
struct cfq_io_context *cic;
+ int ret;
might_sleep_if(gfp_mask & __GFP_WAIT);
@@ -3207,6 +3208,7 @@ cfq_get_io_context(struct cfq_data *cfqd, gfp_t gfp_mask)
if (!ioc)
return NULL;
+retry:
cic = cfq_cic_lookup(cfqd, ioc);
if (cic)
goto out;
@@ -3215,7 +3217,12 @@ cfq_get_io_context(struct cfq_data *cfqd, gfp_t gfp_mask)
if (cic == NULL)
goto err;
- if (cfq_cic_link(cfqd, ioc, cic, gfp_mask))
+ ret = cfq_cic_link(cfqd, ioc, cic, gfp_mask);
+ if (ret == -EEXIST) {
+ /* someone has linked cic to ioc already */
+ cfq_cic_free(cic);
+ goto retry;
+ } else if (ret)
goto err_free;
out:
@@ -4036,6 +4043,11 @@ static void *cfq_init_queue(struct request_queue *q)
if (blkio_alloc_blkg_stats(&cfqg->blkg)) {
kfree(cfqg);
+
+ spin_lock(&cic_index_lock);
+ ida_remove(&cic_index_ida, cfqd->cic_index);
+ spin_unlock(&cic_index_lock);
+
kfree(cfqd);
return NULL;
}
diff --git a/block/genhd.c b/block/genhd.c
index 9253839714ff..02e9fca80825 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -19,7 +19,6 @@
#include <linux/mutex.h>
#include <linux/idr.h>
#include <linux/log2.h>
-#include <linux/ctype.h>
#include "blk.h"
@@ -916,74 +915,6 @@ static int __init genhd_device_init(void)
subsys_initcall(genhd_device_init);
-static ssize_t alias_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct gendisk *disk = dev_to_disk(dev);
- ssize_t ret = 0;
-
- if (disk->alias)
- ret = snprintf(buf, ALIAS_LEN, "%s\n", disk->alias);
- return ret;
-}
-
-static ssize_t alias_store(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct gendisk *disk = dev_to_disk(dev);
- char *alias;
- char *envp[] = { NULL, NULL };
- unsigned char c;
- int i;
- ssize_t ret = count;
-
- if (!count)
- return -EINVAL;
-
- if (count >= ALIAS_LEN) {
- printk(KERN_ERR "alias: alias is too long\n");
- return -EINVAL;
- }
-
- /* Validation check */
- for (i = 0; i < count; i++) {
- c = buf[i];
- if (i == count - 1 && c == '\n')
- break;
- if (!isalnum(c) && c != '_' && c != '-') {
- printk(KERN_ERR "alias: invalid alias\n");
- return -EINVAL;
- }
- }
-
- if (disk->alias) {
- printk(KERN_INFO "alias: %s is already assigned (%s)\n",
- disk->disk_name, disk->alias);
- return -EINVAL;
- }
-
- alias = kasprintf(GFP_KERNEL, "%s", buf);
- if (!alias)
- return -ENOMEM;
-
- if (alias[count - 1] == '\n')
- alias[count - 1] = '\0';
-
- envp[0] = kasprintf(GFP_KERNEL, "ALIAS=%s", alias);
- if (!envp[0]) {
- kfree(alias);
- return -ENOMEM;
- }
-
- disk->alias = alias;
- printk(KERN_INFO "alias: assigned %s to %s\n", alias, disk->disk_name);
-
- kobject_uevent_env(&dev->kobj, KOBJ_ADD, envp);
-
- kfree(envp[0]);
- return ret;
-}
-
static ssize_t disk_range_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -1043,7 +974,6 @@ static ssize_t disk_discard_alignment_show(struct device *dev,
return sprintf(buf, "%d\n", queue_discard_alignment(disk->queue));
}
-static DEVICE_ATTR(alias, S_IRUGO|S_IWUSR, alias_show, alias_store);
static DEVICE_ATTR(range, S_IRUGO, disk_range_show, NULL);
static DEVICE_ATTR(ext_range, S_IRUGO, disk_ext_range_show, NULL);
static DEVICE_ATTR(removable, S_IRUGO, disk_removable_show, NULL);
@@ -1066,7 +996,6 @@ static struct device_attribute dev_attr_fail_timeout =
#endif
static struct attribute *disk_attrs[] = {
- &dev_attr_alias.attr,
&dev_attr_range.attr,
&dev_attr_ext_range.attr,
&dev_attr_removable.attr,