diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 5a5f8bd..f96ed76 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2154,6 +2154,15 @@
 
 	ASSERT_RTNL();
 
+	if ((dev->type != ARPHRD_ETHER) &&
+	    (dev->type != ARPHRD_FDDI) &&
+	    (dev->type != ARPHRD_IEEE802_TR) &&
+	    (dev->type != ARPHRD_ARCNET) &&
+	    (dev->type != ARPHRD_INFINIBAND)) {
+		/* Alas, we support only Ethernet autoconfiguration. */
+		return;
+	}
+
 	idev = addrconf_add_dev(dev);
 	if (idev == NULL)
 		return;
@@ -2241,36 +2250,16 @@
 	ip6_tnl_add_linklocal(idev);
 }
 
-static int ipv6_hwtype(struct net_device *dev)
-{
-	if ((dev->type == ARPHRD_ETHER) ||
-	    (dev->type == ARPHRD_LOOPBACK) ||
-	    (dev->type == ARPHRD_SIT) ||
-	    (dev->type == ARPHRD_TUNNEL6) ||
-	    (dev->type == ARPHRD_FDDI) ||
-	    (dev->type == ARPHRD_IEEE802_TR) ||
-	    (dev->type == ARPHRD_ARCNET) ||
-	    (dev->type == ARPHRD_INFINIBAND))
-		return 1;
-
-	return 0;
-}
-
 static int addrconf_notify(struct notifier_block *this, unsigned long event,
 			   void * data)
 {
 	struct net_device *dev = (struct net_device *) data;
-	struct inet6_dev *idev;
+	struct inet6_dev *idev = __in6_dev_get(dev);
 	int run_pending = 0;
 
-	if (!ipv6_hwtype(dev))
-		return NOTIFY_OK;
-
-	idev = __in6_dev_get(dev);
-
 	switch(event) {
 	case NETDEV_REGISTER:
-		if (!idev) {
+		if (!idev && dev->mtu >= IPV6_MIN_MTU) {
 			idev = ipv6_add_dev(dev);
 			if (!idev)
 				printk(KERN_WARNING "IPv6: add_dev failed for %s\n",