bnx2x: Fix self test of BCM57800

Fix the MAC test of the 1G port of the BCM57800 to use the UMAC instead of the XMAC.
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c

@@ -1749,8 +1749,18 @@ static int bnx2x_run_loopback(struct bnx2x *bp, int loopback_mode)
 			return -EINVAL;
 		break;
 	case BNX2X_MAC_LOOPBACK:
-		bp->link_params.loopback_mode = CHIP_IS_E3(bp) ?
-						LOOPBACK_XMAC : LOOPBACK_BMAC;
+		if (CHIP_IS_E3(bp)) {
+			int cfg_idx = bnx2x_get_link_cfg_idx(bp);
+			if (bp->port.supported[cfg_idx] &
+			    (SUPPORTED_10000baseT_Full |
+			     SUPPORTED_20000baseMLD2_Full |
+			     SUPPORTED_20000baseKR2_Full))
+				bp->link_params.loopback_mode = LOOPBACK_XMAC;
+			else
+				bp->link_params.loopback_mode = LOOPBACK_UMAC;
+		} else
+			bp->link_params.loopback_mode = LOOPBACK_BMAC;
+
 		bnx2x_phy_init(&bp->link_params, &bp->link_vars);
 		break;
 	default: