[PATCH] dm: missing bdput/thaw_bdev at removal

Need to unfreeze and release bdev otherwise the bdev inode with
inconsistent state is reused later and cause problem.

Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Acked-by: Alasdair G Kergon <agk@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index e9adeb9d172f..dad9e403d59d 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -849,6 +849,10 @@ static struct mapped_device *alloc_dev(unsigned int minor, int persistent)
 
 static void free_dev(struct mapped_device *md)
 {
+        if (md->suspended_bdev) {
+                thaw_bdev(md->suspended_bdev, NULL);
+                bdput(md->suspended_bdev);
+        }
         free_minor(md->disk->first_minor);
         mempool_destroy(md->tio_pool);
         mempool_destroy(md->io_pool);