fs_info->qgroup_ulist = NULL;
 }
 
-static int add_qgroup_relation_item(struct btrfs_trans_handle *trans,
-                                   struct btrfs_root *quota_root,
-                                   u64 src, u64 dst)
+static int add_qgroup_relation_item(struct btrfs_trans_handle *trans, u64 src,
+                                   u64 dst)
 {
        int ret;
+       struct btrfs_root *quota_root = trans->fs_info->quota_root;
        struct btrfs_path *path;
        struct btrfs_key key;
 
                }
        }
 
-       ret = add_qgroup_relation_item(trans, quota_root, src, dst);
+       ret = add_qgroup_relation_item(trans, src, dst);
        if (ret)
                goto out;
 
-       ret = add_qgroup_relation_item(trans, quota_root, dst, src);
+       ret = add_qgroup_relation_item(trans, dst, src);
        if (ret) {
                del_qgroup_relation_item(trans, quota_root, src, dst);
                goto out;
                for (i = 0; i < inherit->num_qgroups; ++i, ++i_qgroups) {
                        if (*i_qgroups == 0)
                                continue;
-                       ret = add_qgroup_relation_item(trans, quota_root,
-                                                      objectid, *i_qgroups);
+                       ret = add_qgroup_relation_item(trans, objectid,
+                                                      *i_qgroups);
                        if (ret && ret != -EEXIST)
                                goto out;
-                       ret = add_qgroup_relation_item(trans, quota_root,
-                                                      *i_qgroups, objectid);
+                       ret = add_qgroup_relation_item(trans, *i_qgroups,
+                                                      objectid);
                        if (ret && ret != -EEXIST)
                                goto out;
                }