[IPV6]: Fix Temporary Address Generation

From: Hiroyuki YAMAMORI <h-yamamo@db3.so-net.ne.jp>

Since regen_count is stored in the public address, we need to reset it
when we start renewing temporary address.
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv6/addrconf.c

@@ -2782,6 +2782,9 @@ restart:
 						in6_ifa_hold(ifpub);
 						spin_unlock(&ifp->lock);
 						read_unlock(&addrconf_hash_lock);
+						spin_lock(&ifpub->lock);
+						ifpub->regen_count = 0;
+						spin_unlock(&ifpub->lock);
 						ipv6_create_tempaddr(ifpub, ifp);
 						in6_ifa_put(ifpub);
 						in6_ifa_put(ifp);