[Stable-review,93/93] dm mpath: fix stall when requeueing io

Commit Message

Mikulas Patocka Feb. 23, 2010, 7:52 p.m. UTC

None

Patch

Index: linux-2.6.33-rc8-fast/drivers/md/dm.c
===================================================================
--- linux-2.6.33-rc8-fast.orig/drivers/md/dm.c	2010-02-23 20:45:31.000000000 +0100
+++ linux-2.6.33-rc8-fast/drivers/md/dm.c	2010-02-23 20:46:10.000000000 +0100
@@ -2188,6 +2188,7 @@  void dm_put(struct mapped_device *md)
 	struct dm_table *map;
 
 	BUG_ON(test_bit(DMF_FREEING, &md->flags));
+	might_sleep();
 
 	if (atomic_dec_and_lock(&md->holders, &_minor_lock)) {
 		map = dm_get_live_table(md);