+static void vlan_transfer_features(struct net_device *dev,
+ struct net_device *vlandev)
+{
+ unsigned long old_features = vlandev->features;
+
+ if (dev->features & NETIF_F_VLAN_TSO) {
+ vlandev->features &= ~VLAN_TSO_FEATURES;
+ vlandev->features |= dev->features & VLAN_TSO_FEATURES;
+ }
+ if (dev->features & NETIF_F_VLAN_CSUM) {
+ vlandev->features &= ~NETIF_F_ALL_CSUM;
+ vlandev->features |= dev->features & NETIF_F_ALL_CSUM;
+ }
+
+ if (old_features != vlandev->features)
+ netdev_features_change(vlandev);
+}
+