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.

Changelog: v4: Add Acked-by from Kent Overstreet. v3: Use IS_ENABLED(CONFIG_DEBUG_FS) to replace #ifdef DEBUG_FS. v2: Remove a warning information v1: Initial version.

Fixes: Commit 539d39eb2708 ("bcache: fix wrong return value in bch_debug_init()") Cc: stable@vger.kernel.org Signed-off-by: Coly Li colyli@suse.de Reported-by: Massimo B. massimo.b@gmx.net Reported-by: Kai Krakow kai@kaishome.de Tested-by: Kai Krakow kai@kaishome.de Acked-by: Kent Overstreet kent.overstreet@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); }