RDMAC_MODE_LNGREAD_ENAB);
        if (tp->tg3_flags & TG3_FLAG_SPLIT_MODE)
                rdmac_mode |= RDMAC_MODE_SPLIT_ENABLE;
-       if ((GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5705 &&
-            tp->pci_chip_rev_id != CHIPREV_ID_5705_A0) ||
-           (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5750 ||
-            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752)) {
+       if ((tp->tg3_flags2 & TG3_FLG2_5705_PLUS) &&
+            tp->pci_chip_rev_id != CHIPREV_ID_5705_A0) {
                if (tp->tg3_flags2 & TG3_FLG2_TSO_CAPABLE &&
                    (tp->pci_chip_rev_id == CHIPREV_ID_5705_A1 ||
                     tp->pci_chip_rev_id == CHIPREV_ID_5705_A2)) {
               WDMAC_MODE_FIFOURUN_ENAB | WDMAC_MODE_FIFOOREAD_ENAB |
               WDMAC_MODE_LNGREAD_ENAB);
 
-       if ((GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5705 &&
-            tp->pci_chip_rev_id != CHIPREV_ID_5705_A0) ||
-           (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5750 ||
-            GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5752)) {
+       if ((tp->tg3_flags2 & TG3_FLG2_5705_PLUS) &&
+            tp->pci_chip_rev_id != CHIPREV_ID_5705_A0) {
                if ((tp->tg3_flags & TG3_FLG2_TSO_CAPABLE) &&
                    (tp->pci_chip_rev_id == CHIPREV_ID_5705_A1 ||
                     tp->pci_chip_rev_id == CHIPREV_ID_5705_A2)) {