PCH_GBE_TX_DESC
tx_desc = PCH_GBE_TX_DESC(*tx_ring, ring_num);
tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
tx_desc = PCH_GBE_TX_DESC(*tx_ring, k);
tx_desc = PCH_GBE_TX_DESC(*tx_ring, i);
tx_desc = PCH_GBE_TX_DESC(*tx_ring, desNo);