e1000_adv_rx_desc
rsize = roundup2(rxr->num_rx_desc * sizeof(union e1000_adv_rx_desc),
igb_setup_rxdesc(union e1000_adv_rx_desc *rxd, const struct igb_rx_buf *rxbuf)
rxr->num_rx_desc * sizeof(union e1000_adv_rx_desc));
union e1000_adv_rx_desc *cur;
union e1000_adv_rx_desc *rx_base;