i40e_next_desc
cur_head = i40e_next_desc(cur_head, 1, rxd->rxd_ring_size);
index = i40e_next_desc(index, 1, itrq->itrq_tx_ring_size);
toclean = i40e_next_desc(toclean, 1,
itrq->itrq_desc_tail = i40e_next_desc(itrq->itrq_desc_tail, 1,
itrq->itrq_desc_tail = i40e_next_desc(tail, 1,