IGC_TX_DESC
tx_desc = IGC_TX_DESC(tx_ring, i);
desc = IGC_TX_DESC(ring, ring->next_to_use);
tx_desc = IGC_TX_DESC(tx_ring, i);
tx_desc = IGC_TX_DESC(tx_ring, 0);
tx_desc = IGC_TX_DESC(tx_ring, 0);
tx_desc = IGC_TX_DESC(tx_ring, i);
tx_desc = IGC_TX_DESC(tx_ring, 0);
union igc_adv_tx_desc *desc = IGC_TX_DESC(ring, index);
desc = IGC_TX_DESC(ring, index);
tx_desc = IGC_TX_DESC(ring, ntu);
tx_desc = IGC_TX_DESC(tx_ring, i);
tx_desc = IGC_TX_DESC(tx_ring, 0);
tx_desc = IGC_TX_DESC(tx_ring, 0);
desc = IGC_TX_DESC(ring, ring->next_to_use);