XEN_NETIF_RSP_ERROR
make_tx_response(queue, txp, extra_count, XEN_NETIF_RSP_ERROR);
XEN_NETIF_RSP_ERROR);
XEN_NETIF_RSP_ERROR);
xenvif_idx_release(queue, pending_idx, XEN_NETIF_RSP_ERROR);
XEN_NETIF_RSP_ERROR);