From: Joe Thornber <ejt@redhat.com>
Date: Wed, 7 Mar 2012 19:09:43 +0000 (+0000)
Subject: dm thin metadata: unlock superblock in init_pmd error path
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=4469a5f387fdde956894137751a41473618a4a52;p=linux-beck.git

dm thin metadata: unlock superblock in init_pmd error path

If dm_sm_disk_create() fails the superblock must be unlocked.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---

diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index 13d964636d57..05b7ffc030ed 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -385,6 +385,7 @@ static int init_pmd(struct dm_pool_metadata *pmd,
 		data_sm = dm_sm_disk_create(tm, nr_blocks);
 		if (IS_ERR(data_sm)) {
 			DMERR("sm_disk_create failed");
+			dm_tm_unlock(tm, sblock);
 			r = PTR_ERR(data_sm);
 			goto bad;
 		}