be2net: reduce gso_max_size setting to account for ethernet header.

The maximum size of packet that can be handled by controller including ethernet
header is 65535. Reducing gso_max_size accordingly.

Signed-off-by: Sarveshwar Bandi <sarveshwar.bandi@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index fdb50ce..501dfa9 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -3237,7 +3237,7 @@
 
 	netdev->flags |= IFF_MULTICAST;
 
-	netif_set_gso_max_size(netdev, 65535);
+	netif_set_gso_max_size(netdev, 65535 - ETH_HLEN);
 
 	netdev->netdev_ops = &be_netdev_ops;