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-rw-r--r--drivers/md/dm-thin-metadata.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index a010ff1e5c92..e60e1326376a 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -1362,8 +1362,10 @@ static int __reserve_metadata_snap(struct dm_pool_metadata *pmd)
dm_sm_inc_block(pmd->metadata_sm, THIN_SUPERBLOCK_LOCATION);
r = dm_tm_shadow_block(pmd->tm, THIN_SUPERBLOCK_LOCATION,
&sb_validator, &copy, &inc);
- if (r)
+ if (r) {
+ dm_sm_dec_block(pmd->metadata_sm, THIN_SUPERBLOCK_LOCATION);
return r;
+ }
BUG_ON(!inc);