[26/41] dm: fix locking context in queue_io()

Commit Message

Tejun Heo Sept. 3, 2010, 10:29 a.m. UTC

None

Patch

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 2011704..cd2f7e7 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -512,9 +512,11 @@  static void end_io_acct(struct dm_io *io)
  */
 static void queue_io(struct mapped_device *md, struct bio *bio)
 {
-	spin_lock_irq(&md->deferred_lock);
+	unsigned long flags;
+
+	spin_lock_irqsave(&md->deferred_lock, flags);
 	bio_list_add(&md->deferred, bio);
-	spin_unlock_irq(&md->deferred_lock);
+	spin_unlock_irqrestore(&md->deferred_lock, flags);
 	queue_work(md->wq, &md->work);
 }