Btrfs: Cocci spatch "ptr_ret.spatch"

Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index b1446c0..c58bf19 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -3283,10 +3283,7 @@
 	}
 
 	tsk = kthread_run(balance_kthread, fs_info, "btrfs-balance");
-	if (IS_ERR(tsk))
-		return PTR_ERR(tsk);
-
-	return 0;
+	return PTR_RET(tsk);
 }
 
 int btrfs_recover_balance(struct btrfs_fs_info *fs_info)