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authorLinus Torvalds <torvalds@linux-foundation.org>2011-09-28 08:03:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-09-28 08:03:00 -0700
commitc54a06d45a937750e76df2f91e940f82c07c5bf7 (patch)
tree703df5d5e9880c321aa14646668d642db1a3e8f5
parente689ec8057ea07f918dc2201a5beb7f2292db32f (diff)
parent777eb1bf15b8532c396821774bf6451e563438f5 (diff)
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
* 'for-linus' of git://git.kernel.dk/linux-block: block: Free queue resources at blk_release_queue()
-rw-r--r--block/blk-core.c13
-rw-r--r--block/blk-sysfs.c5
2 files changed, 11 insertions, 7 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index b2ed78afd9f0..d34433ae7917 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -348,9 +348,10 @@ void blk_put_queue(struct request_queue *q)
EXPORT_SYMBOL(blk_put_queue);
/*
- * Note: If a driver supplied the queue lock, it should not zap that lock
- * unexpectedly as some queue cleanup components like elevator_exit() and
- * blk_throtl_exit() need queue lock.
+ * Note: If a driver supplied the queue lock, it is disconnected
+ * by this function. The actual state of the lock doesn't matter
+ * here as the request_queue isn't accessible after this point
+ * (QUEUE_FLAG_DEAD is set) and no other requests will be queued.
*/
void blk_cleanup_queue(struct request_queue *q)
{
@@ -367,10 +368,8 @@ void blk_cleanup_queue(struct request_queue *q)
queue_flag_set_unlocked(QUEUE_FLAG_DEAD, q);
mutex_unlock(&q->sysfs_lock);
- if (q->elevator)
- elevator_exit(q->elevator);
-
- blk_throtl_exit(q);
+ if (q->queue_lock != &q->__queue_lock)
+ q->queue_lock = &q->__queue_lock;
blk_put_queue(q);
}
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index e681805cdb47..60fda88c57f0 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -479,6 +479,11 @@ static void blk_release_queue(struct kobject *kobj)
blk_sync_queue(q);
+ if (q->elevator)
+ elevator_exit(q->elevator);
+
+ blk_throtl_exit(q);
+
if (rl->rq_pool)
mempool_destroy(rl->rq_pool);