1 files changed, 13 insertions, 0 deletions

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index fe649081fbdc..6d37b7e2a767 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -468,6 +468,19 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
                 }
                 break;
 
+        case NETDEV_CHANGEMTU:
+                for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {
+                        vlandev = vlan_group_get_device(grp, i);
+                        if (!vlandev)
+                                continue;
+
+                        if (vlandev->mtu <= dev->mtu)
+                                continue;
+
+                        dev_set_mtu(vlandev, dev->mtu);
+                }
+                break;
+
         case NETDEV_FEAT_CHANGE:
                 /* Propagate device features to underlying device */
                 for (i = 0; i < VLAN_GROUP_ARRAY_LEN; i++) {