IPV6: Call inet6addr_chain notifiers on link down

Currently if the link is brought down via ip link or ifconfig down, the inet6addr_chain notifiers are not called even though all the addresses are removed from the interface. This caused SCTP to add duplicate addresses to it's list.

---
 net/ipv6/addrconf.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

index f96ed76..6496e03 100644
@@ -2472,6 +2472,7 @@ static int addrconf_ifdown(struct net_device *dev, int how)
 		write_unlock_bh(&idev->lock);
 
 		__ipv6_ifa_notify(RTM_DELADDR, ifa);
+		atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifp);
 		in6_ifa_put(ifa);
 
 		write_lock_bh(&idev->lock);

1.5.0.3.438.gc49b2

From: Vlad Yasevich <[email protected]>
Date: Tue, 03 Jul 2007 10:57:32 -0400

Looks good, applied, thanks Vlad.
I'll push this to -stable too.