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dm cache: detect cache_create failure

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Return error if cache_create() fails.

A missing return check made cache_ctr continue even after an error in
cache_create() resulting in the cache object being destroyed.  So a
simple failure like an odd number of cache policy config value arguments
would result in an oops.

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
This commit is contained in:
Heinz Mauelshagen 2013-03-20 17:21:26 +00:00 committed by Alasdair G Kergon
parent 414dd67d50
commit 617a0b89da
1 changed files with 2 additions and 0 deletions
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2
drivers/md/dm-cache-target.c
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@ -2009,6 +2009,8 @@ static int cache_ctr(struct dm_target *ti, unsigned argc, char **argv)
goto out;
r = cache_create(ca, &cache);
if (r)
goto out;
r = copy_ctr_args(cache, argc - 3, (const char **)argv + 3);
if (r) {