IGB_TX_DESC
tx_desc = IGB_TX_DESC(tx_ring, i);
tx_desc = IGB_TX_DESC(tx_ring, i);
tx_desc = IGB_TX_DESC(tx_ring, 0);
tx_desc = IGB_TX_DESC(tx_ring, i);
tx_desc = IGB_TX_DESC(tx_ring, 0);
tx_desc = IGB_TX_DESC(tx_ring, 0);
union e1000_adv_tx_desc *tx_desc = IGB_TX_DESC(tx_ring, index);
tx_desc = IGB_TX_DESC(tx_ring, index);
tx_desc = IGB_TX_DESC(tx_ring, i);
tx_desc = IGB_TX_DESC(tx_ring, 0);
tx_desc = IGB_TX_DESC(tx_ring, 0);
tx_desc = IGB_TX_DESC(tx_ring, tx_ring->next_to_use);