[PATCH] device-mapper multipath: Flush workqueue when destroying

The multipath destructor must flush its workqueue.  Otherwise items that
reference the destroyed object could remain.

From: "goggin, edward" <egoggin@emc.com>
Signed-off-by: Lars Marowsky-Bree <lmb@suse.de>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 84cdb700a247..fa72f0153206 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -752,6 +752,8 @@ static int multipath_ctr(struct dm_target *ti, unsigned int argc,
 static void multipath_dtr(struct dm_target *ti)
 {
         struct multipath *m = (struct multipath *) ti->private;
+
+        flush_workqueue(kmultipathd);
         free_multipath(m);
 }