dm snapshot: fix error return code in snapshot_ctr

commit 09e8b813897a0f85bb401435d009228644c81214 upstream.

Return -ENOMEM instead of success if unable to allocate pending
exception mempool in snapshot_ctr.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 34ec2b5..b4aaa7b 100644 (file)
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -1117,6 +1117,7 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv)
        s->pending_pool = mempool_create_slab_pool(MIN_IOS, pending_cache);
        if (!s->pending_pool) {
                ti->error = "Could not allocate mempool for pending exceptions";
+               r = -ENOMEM;
                goto bad_pending_pool;
        }