ixgbe: Fix gso_max_size for 82599 when DCB is enabled

The 32k gso_max_size when DCB is enabled is for 82598 only, not for 82599.
Signed-off-by: NYi Zou <yi.zou@intel.com>
Acked-by: NPeter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ixgbe/ixgbe_main.c

@@ -2471,7 +2471,10 @@ static void ixgbe_configure(struct ixgbe_adapter *adapter)
 	ixgbe_restore_vlan(adapter);
 #ifdef CONFIG_IXGBE_DCB
 	if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
-		netif_set_gso_max_size(netdev, 32768);
+		if (hw->mac.type == ixgbe_mac_82598EB)
+			netif_set_gso_max_size(netdev, 32768);
+		else
+			netif_set_gso_max_size(netdev, 65536);
 		ixgbe_configure_dcb(adapter);
 	} else {
 		netif_set_gso_max_size(netdev, 65536);