[PATCH] btrfs: add a check for sysfs_create_group

[Kangjie Lu]

In case sysfs_create_group fails, let's check its return value and
issues an error message.

Signed-off-by: Kangjie Lu <k...@umn.edu>
---
 fs/btrfs/sysfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 3717c864ba23..62529153a51a 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -889,6 +889,8 @@ void btrfs_sysfs_feature_update(struct btrfs_fs_info 
*fs_info,
         */
        sysfs_remove_group(fsid_kobj, &btrfs_feature_attr_group);
        ret = sysfs_create_group(fsid_kobj, &btrfs_feature_attr_group);
+       if (ret)
+               pr_err("failed to create btrfs_feature_attr_group.\n");
 }
 
 static int btrfs_init_debugfs(void)
-- 
2.17.2 (Apple Git-113)