IPv6: only notify protocols if address is compeletely gone

The notifier for address down should only be called if address is completely
gone, not just being marked as tentative on link transistion. The code
in net-next would case bonding/sctp/s390 to see address disappear on link
down, but they would never see it reappear on link up.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index a0175edb65899835eae0968b47836befee03ea70..7cba8845242fba08d4897070a28667d4f4dfe610 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2715,7 +2715,9 @@ static int addrconf_ifdown(struct net_device *dev, int how)
                }
 
                __ipv6_ifa_notify(RTM_DELADDR, ifa);
-               atomic_notifier_call_chain(&inet6addr_chain, NETDEV_DOWN, ifa);
+               if (ifa->dead)
+                       atomic_notifier_call_chain(&inet6addr_chain,
+                                                  NETDEV_DOWN, ifa);
                in6_ifa_put(ifa);
 
                write_lock_bh(&idev->lock);