dest->root_item.drop_level = 0;
btrfs_set_root_refs(&dest->root_item, 0);
- ret = btrfs_insert_orphan_item(trans,
- root->fs_info->tree_root,
- dest->root_key.objectid);
- BUG_ON(ret);
+ if (!xchg(&dest->orphan_item_inserted, 1)) {
+ ret = btrfs_insert_orphan_item(trans,
+ root->fs_info->tree_root,
+ dest->root_key.objectid);
+ BUG_ON(ret);
+ }
ret = btrfs_commit_transaction(trans, root);
BUG_ON(ret);