1 files changed, 8 insertions, 4 deletions

diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index 038f511c73fa..0f1beceb47d5 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -1291,7 +1291,8 @@ static int fib_inetaddr_event(struct notifier_block *this, unsigned long event,
 static int fib_netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
 {
         struct net_device *dev = netdev_notifier_info_to_dev(ptr);
-        struct netdev_notifier_changeupper_info *info;
+        struct netdev_notifier_changeupper_info *upper_info = ptr;
+        struct netdev_notifier_info_ext *info_ext = ptr;
         struct in_device *in_dev;
         struct net *net = dev_net(dev);
         unsigned int flags;
@@ -1326,16 +1327,19 @@ static int fib_netdev_event(struct notifier_block *this, unsigned long event, vo
                         fib_sync_up(dev, RTNH_F_LINKDOWN);
                 else
                         fib_sync_down_dev(dev, event, false);
-                /* fall through */
+                rt_cache_flush(net);
+                break;
         case NETDEV_CHANGEMTU:
+                fib_sync_mtu(dev, info_ext->ext.mtu);
                 rt_cache_flush(net);
                 break;
         case NETDEV_CHANGEUPPER:
-                info = ptr;
+                upper_info = ptr;
                 /* flush all routes if dev is linked to or unlinked from
                  * an L3 master device (e.g., VRF)
                  */
-                if (info->upper_dev && netif_is_l3_master(info->upper_dev))
+                if (upper_info->upper_dev &&
+                    netif_is_l3_master(upper_info->upper_dev))
                         fib_disable_ip(dev, NETDEV_DOWN, true);
                 break;
         }