NETIF_RSP_ERROR
status = NETIF_RSP_ERROR;
xnb_tx_mark_complete(xnbp, txreq->id, NETIF_RSP_ERROR);
status ? NETIF_RSP_OKAY : NETIF_RSP_ERROR);
xnb_tx_mark_complete(xnbp, txreq->id, NETIF_RSP_ERROR);
xnb_tx_mark_complete(xnbp, txp->xt_id, NETIF_RSP_ERROR);
status = NETIF_RSP_ERROR;
case NETIF_RSP_ERROR: