vmxnet3: fail when try to setup unsupported features

Return EOPNOTSUPP in ethtool_ops->set_flags.

Fix coding style while at it.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/vmxnet3/vmxnet3_ethtool.c

@@ -276,16 +276,21 @@ vmxnet3_get_strings(struct net_device *netdev, u32 stringset, u8 *buf)
 }
 
 static u32
-vmxnet3_get_flags(struct net_device *netdev) {
+vmxnet3_get_flags(struct net_device *netdev)
+{
 	return netdev->features;
 }
 
 static int
-vmxnet3_set_flags(struct net_device *netdev, u32 data) {
+vmxnet3_set_flags(struct net_device *netdev, u32 data)
+{
 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
 	u8 lro_requested = (data & ETH_FLAG_LRO) == 0 ? 0 : 1;
 	u8 lro_present = (netdev->features & NETIF_F_LRO) == 0 ? 0 : 1;
 
+	if (data & ~ETH_FLAG_LRO)
+		return -EOPNOTSUPP;
+
 	if (lro_requested ^ lro_present) {
 		/* toggle the LRO feature*/
 		netdev->features ^= NETIF_F_LRO;