3.0-stable review patch.  If anyone has any objections, please let me know.

------------------


From: Li Wei <[email protected]>

[ Upstream commit d6ddef9e641d1229d4ec841dc75ae703171c3e92 ]

When forwarding was set and a new net device is register,
we need add this device to the all-router mcast group.

Signed-off-by: Li Wei <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
 net/ipv6/addrconf.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -433,6 +433,10 @@ static struct inet6_dev * ipv6_add_dev(s
        /* Join all-node multicast group */
        ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
 
+       /* Join all-router multicast group if forwarding is set */
+       if (ndev->cnf.forwarding && dev && (dev->flags & IFF_MULTICAST))
+               ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
+
        return ndev;
 }
 


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