[IPV6] Bring lo up before setting other interface up.

IPv6 was not configured appropriately without lo.
Noticed by / tested by Russell King <rmk+lkml@arm.linux.org.uk>.
Signed-off-by: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@redhat.com>

net/ipv4/ipconfig.c

@@ -183,7 +183,14 @@ static int __init ic_open_devs(void)
 
 	last = &ic_first_dev;
 	rtnl_shlock();
+
+	/* bring loopback device up first */
+	if (dev_change_flags(&loopback_dev, loopback_dev.flags | IFF_UP) < 0)
+		printk(KERN_ERR "IP-Config: Failed to open %s\n", loopback_dev.name);
+
 	for (dev = dev_base; dev; dev = dev->next) {
+		if (dev == &loopback_dev)
+			continue;
 		if (user_dev_name[0] ? !strcmp(dev->name, user_dev_name) :
 		    (!(dev->flags & IFF_LOOPBACK) &&
 		     (dev->flags & (IFF_POINTOPOINT|IFF_BROADCAST)) &&