diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 30f6513f3b4d..d7668b881d08 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1718,7 +1718,7 @@ struct pcpu_sw_netstats {
 #define NETDEV_CHANGE	0x0004	/* Notify device state change */
 #define NETDEV_REGISTER 0x0005
 #define NETDEV_UNREGISTER	0x0006
-#define NETDEV_CHANGEMTU	0x0007
+#define NETDEV_CHANGEMTU	0x0007 /* notify after mtu change happened */
 #define NETDEV_CHANGEADDR	0x0008
 #define NETDEV_GOING_DOWN	0x0009
 #define NETDEV_CHANGENAME	0x000A
@@ -1734,6 +1734,7 @@ struct pcpu_sw_netstats {
 #define NETDEV_JOIN		0x0014
 #define NETDEV_CHANGEUPPER	0x0015
 #define NETDEV_RESEND_IGMP	0x0016
+#define NETDEV_PRECHANGEMTU	0x0017 /* notify before mtu change happened */
 
 int register_netdevice_notifier(struct notifier_block *nb);
 int unregister_netdevice_notifier(struct notifier_block *nb);
diff --git a/net/core/dev.c b/net/core/dev.c
index b2c1869b04e3..f87bedd51eed 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5392,6 +5392,11 @@ int dev_set_mtu(struct net_device *dev, int new_mtu)
 	if (!netif_device_present(dev))
 		return -ENODEV;
 
+	err = call_netdevice_notifiers(NETDEV_PRECHANGEMTU, dev);
+	err = notifier_to_errno(err);
+	if (err)
+		return err;
+
 	orig_mtu = dev->mtu;
 	err = __dev_set_mtu(dev, new_mtu);