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Diffstat (limited to 'net/8021q/vlan.c')
-rw-r--r--net/8021q/vlan.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index b934159a6f07..51961300b586 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -382,6 +382,24 @@ static void vlan_sync_address(struct net_device *dev,
memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
}
+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);
+}
+
static void __vlan_device_event(struct net_device *dev, unsigned long event)
{
switch (event) {
@@ -448,6 +466,18 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
}
break;
+ case NETDEV_FEAT_CHANGE:
+ /* Propagate device features to underlying device */
+ for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
+ vlandev = vlan_group_get_device(grp, i);
+ if (!vlandev)
+ continue;
+
+ vlan_transfer_features(dev, vlandev);
+ }
+
+ break;
+
case NETDEV_DOWN:
/* Put all VLANs for this dev in the down state too. */
for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {