1 files changed, 10 insertions, 1 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 567664eac463..e8c347579da9 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2293,6 +2293,9 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
                                 break;
                         }
 
+                        if (!idev && dev->mtu >= IPV6_MIN_MTU)
+                                idev = ipv6_add_dev(dev);
+
                         if (idev)
                                 idev->if_flags |= IF_READY;
                 } else {
@@ -2357,12 +2360,18 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
                 break;
 
         case NETDEV_CHANGEMTU:
-                if ( idev && dev->mtu >= IPV6_MIN_MTU) {
+                if (idev && dev->mtu >= IPV6_MIN_MTU) {
                         rt6_mtu_change(dev, dev->mtu);
                         idev->cnf.mtu6 = dev->mtu;
                         break;
                 }
 
+                if (!idev && dev->mtu >= IPV6_MIN_MTU) {
+                        idev = ipv6_add_dev(dev);
+                        if (idev)
+                                break;
+                }
+
                 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
 
         case NETDEV_DOWN: