Commit 539d39eb2708 ("bcache: fix wrong return value in bch_debug_init()")
returns the return value of debugfs_create_dir() to bcache_init(). When
CONFIG_DEBUG_FS=n, bch_debug_init() always returns 1 and makes
bcache_init() failedi.

This patch makes bch_debug_init() always returns 0 if CONFIG_DEBUG_FS=n,
so bcache can continue to work for the kernels which don't have debugfs
enanbled.

Fixes: Commit 539d39eb2708 ("bcache: fix wrong return value in 
bch_debug_init()")
Cc: sta...@vger.kernel.org
Signed-off-by: Coly Li <col...@suse.de>
Reported-by: Massimo B. <massim...@gmx.net>
Reported-by: Kai Krakow <k...@kaishome.de>
Tested-by: Kai Krakow <k...@kaishome.de>
Cc: Kent Overstreet <kent.overstr...@gmail.com>
---
 drivers/md/bcache/debug.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c
index 4e63c6f6c04d..d030ce3025a6 100644
--- a/drivers/md/bcache/debug.c
+++ b/drivers/md/bcache/debug.c
@@ -250,7 +250,9 @@ void bch_debug_exit(void)
 
 int __init bch_debug_init(struct kobject *kobj)
 {
-       bcache_debug = debugfs_create_dir("bcache", NULL);
+       if (!IS_ENABLED(CONFIG_DEBUG_FS))
+               return 0;
 
+       bcache_debug = debugfs_create_dir("bcache", NULL);
        return IS_ERR_OR_NULL(bcache_debug);
 }
-- 
2.16.3

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