2 files changed, 27 insertions, 3 deletions

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index e7ddbfa0e02f..08f14f6c5fd6 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -383,6 +383,18 @@ 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;
+
+        vlandev->features &= ~dev->vlan_features;
+        vlandev->features |= dev->features & dev->vlan_features;
+
+        if (old_features != vlandev->features)
+                netdev_features_change(vlandev);
+}
+
 static void __vlan_device_event(struct net_device *dev, unsigned long event)
 {
         switch (event) {
@@ -411,10 +423,8 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
         int i, flgs;
         struct net_device *vlandev;
 
-        if (is_vlan_dev(dev)) {
+        if (is_vlan_dev(dev))
                 __vlan_device_event(dev, event);
-                goto out;
-        }
 
         grp = __vlan_find_group(dev);
         if (!grp)
@@ -451,6 +461,18 @@ 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++) {
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index c961f0826005..5d055c242ed8 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -663,6 +663,8 @@ static int vlan_dev_init(struct net_device *dev)
                                           (1<<__LINK_STATE_DORMANT))) |
                       (1<<__LINK_STATE_PRESENT);
 
+        dev->features |= real_dev->features & real_dev->vlan_features;
+
         /* ipv6 shared card related stuff */
         dev->dev_id = real_dev->dev_id;