bcache: fix wrong return value in bch_debug_init()

in bch_debug_init(), ret is always 0, and the return value is useless,
change it to return 0 if be success after calling debugfs_create_dir(),
else return a non-zero value.

Signed-off-by: Tang Junhui <tang.junhui@zte.com.cn>
Reviewed-by: Michael Lyle <mlyle@lyle.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c
index 879ab21074c6..af89408befe8 100644
--- a/drivers/md/bcache/debug.c
+++ b/drivers/md/bcache/debug.c
@@ -251,8 +251,7 @@ void bch_debug_exit(void)
 
 int __init bch_debug_init(struct kobject *kobj)
 {
-	int ret = 0;
-
 	debug = debugfs_create_dir("bcache", NULL);
-	return ret;
+
+	return IS_ERR_OR_NULL(debug);
 }