IPv6: only notify protocols if address is completely gone

(cherry picked from commit 8595805aafc8b077e01804c9a3668e9aa3510e89)

The notifier for address down should only be called if address is completely
gone, not just being marked as tentative on link transition. 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 12e95580755d31cef237fa36f178d2d2f5d10b2f..844ffc5a7420f423441ff35bd12450f00b094536 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2729,7 +2729,9 @@ 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, ifa);
+               if (ifa->dead)
+                       atomic_notifier_call_chain(&inet6addr_chain,
+                                                  NETDEV_DOWN, ifa);
                in6_ifa_put(ifa);
 
                write_lock_bh(&idev->lock);