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authorAliaksei Karaliou <akaraliou.dev@gmail.com>2017-12-23 13:27:04 +0300
committerMike Snitzer <snitzer@redhat.com>2018-01-17 17:16:03 +0300
commit46898e9a7ac9fb2d0d108cc7b753abccbf9d9f20 (patch)
tree54b0f61af72d0ec85cd12020509eeb03f0923abb /drivers/md/dm-bufio.c
parentbde14184781bd24ee6fb0e1af8d69ca21acbd6e6 (diff)
downloadlinux-46898e9a7ac9fb2d0d108cc7b753abccbf9d9f20.tar.xz
dm bufio: check result of register_shrinker()
dm_bufio_client_create() does not check result of register_shrinker() which was tagged as __must_check recently, reported by sparse. Signed-off-by: Aliaksei Karaliou <akaraliou.dev@gmail.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-bufio.c')
-rw-r--r--drivers/md/dm-bufio.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c
index 1d130130f264..b98c72fa7322 100644
--- a/drivers/md/dm-bufio.c
+++ b/drivers/md/dm-bufio.c
@@ -1743,20 +1743,23 @@ struct dm_bufio_client *dm_bufio_client_create(struct block_device *bdev, unsign
__free_buffer_wake(b);
}
+ c->shrinker.count_objects = dm_bufio_shrink_count;
+ c->shrinker.scan_objects = dm_bufio_shrink_scan;
+ c->shrinker.seeks = 1;
+ c->shrinker.batch = 0;
+ r = register_shrinker(&c->shrinker);
+ if (r)
+ goto bad_shrinker;
+
mutex_lock(&dm_bufio_clients_lock);
dm_bufio_client_count++;
list_add(&c->client_list, &dm_bufio_all_clients);
__cache_size_refresh();
mutex_unlock(&dm_bufio_clients_lock);
- c->shrinker.count_objects = dm_bufio_shrink_count;
- c->shrinker.scan_objects = dm_bufio_shrink_scan;
- c->shrinker.seeks = 1;
- c->shrinker.batch = 0;
- register_shrinker(&c->shrinker);
-
return c;
+bad_shrinker:
bad_buffer:
bad_cache:
while (!list_empty(&c->reserved_buffers)) {