Btrfs: Check if kobject is initialized before put

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Tested-by: David Sterba <dsterba@suse.cz>
Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index ea81a05..603b0cc 100644 (file)
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -523,9 +523,11 @@ static void __btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs)
                fs_devs->device_dir_kobj = NULL;
        }
 
-       kobject_del(&fs_devs->super_kobj);
-       kobject_put(&fs_devs->super_kobj);
-       wait_for_completion(&fs_devs->kobj_unregister);
+       if (fs_devs->super_kobj.state_initialized) {
+               kobject_del(&fs_devs->super_kobj);
+               kobject_put(&fs_devs->super_kobj);
+               wait_for_completion(&fs_devs->kobj_unregister);
+       }
 }
 
 /* when fs_devs is NULL it will remove all fsid kobject */