[NET]: Fix tunnel device bugs added by alloc_netdev() changes.

net/ipv4/ip_gre.c

@@ -1154,6 +1154,8 @@ static int ipgre_tunnel_init(struct net_device *dev)
 	iph = &tunnel->parms.iph;
 
 	tunnel->dev = dev;
+	strcpy(tunnel->parms.name, dev->name);
+
 	memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4);
 	memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4);
 
@@ -1215,6 +1217,9 @@ int __init ipgre_fb_tunnel_init(struct net_device *dev)
 	struct ip_tunnel *tunnel = (struct ip_tunnel*)dev->priv;
 	struct iphdr *iph = &tunnel->parms.iph;
 
+	tunnel->dev = dev;
+	strcpy(tunnel->parms.name, dev->name);
+
 	iph->version		= 4;
 	iph->protocol		= IPPROTO_GRE;
 	iph->ihl		= 5;

net/ipv4/ipip.c

@@ -805,7 +805,10 @@ static int ipip_tunnel_init(struct net_device *dev)
 
 	tunnel = (struct ip_tunnel*)dev->priv;
 	iph = &tunnel->parms.iph;
+
 	tunnel->dev = dev;
+	strcpy(tunnel->parms.name, dev->name);
+
 	memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4);
 	memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4);
 
@@ -841,6 +844,9 @@ static int __init ipip_fb_tunnel_init(struct net_device *dev)
 	struct ip_tunnel *tunnel = dev->priv;
 	struct iphdr *iph = &tunnel->parms.iph;
 
+	tunnel->dev = dev;
+	strcpy(tunnel->parms.name, dev->name);
+
 	iph->version		= 4;
 	iph->protocol		= IPPROTO_IPIP;
 	iph->ihl		= 5;

net/ipv6/sit.c

@@ -743,7 +743,10 @@ static int ipip6_tunnel_init(struct net_device *dev)
 
 	tunnel = (struct ip_tunnel*)dev->priv;
 	iph = &tunnel->parms.iph;
+
 	tunnel->dev = dev;
+	strcpy(tunnel->parms.name, dev->name);
+
 	memcpy(dev->dev_addr, &tunnel->parms.iph.saddr, 4);
 	memcpy(dev->broadcast, &tunnel->parms.iph.daddr, 4);
 
@@ -780,6 +783,9 @@ int __init ipip6_fb_tunnel_init(struct net_device *dev)
 	struct ip_tunnel *tunnel = dev->priv;
 	struct iphdr *iph = &tunnel->parms.iph;
 
+	tunnel->dev = dev;
+	strcpy(tunnel->parms.name, dev->name);
+
 	iph->version		= 4;
 	iph->protocol		= IPPROTO_IPV6;
 	iph->ihl		= 5;