From: Anand Jain <Anand.Jain@oracle.com>
Date: Mon, 22 Jun 2015 10:18:32 +0000 (+0800)
Subject: Btrfs: Check if kobject is initialized before put
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f90fc5472882ee7e76e0f345b9642b92c8677582;p=linux-beck.git

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 ea81a057c79b..603b0cc2b9bb 100644
--- 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 */