bcache: Trivial error handling fix

Signed-off-by: Kent Overstreet <kmo@daterainc.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index e363efcf2b76..677a604e7f3f 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -2065,7 +2065,8 @@ static void bcache_exit(void)
                 kobject_put(bcache_kobj);
         if (bcache_wq)
                 destroy_workqueue(bcache_wq);
-        unregister_blkdev(bcache_major, "bcache");
+        if (bcache_major)
+                unregister_blkdev(bcache_major, "bcache");
         unregister_reboot_notifier(&reboot);
 }