From: Hannes Frederic Sowa <hannes@stressinduktion.org>
Date: Thu, 8 Oct 2015 16:19:39 +0000 (+0200)
Subject: ipv6: gre: setup default multicast routes over PtP links
X-Git-Tag: firefly_0821_release~176^2~903^2~23
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d9e4ce65b27694b0b70ff4d1cbbb740195fd916b;p=firefly-linux-kernel-4.4.55.git

ipv6: gre: setup default multicast routes over PtP links

GRE point-to-point interfaces should also support ipv6 multicast. Setting
up default multicast routes on interface creation was forgotten. Add it.

Bugzilla: <https://bugzilla.kernel.org/show_bug.cgi?id=103231>
Cc: Julien Muchembled <jm@jmuchemb.eu>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Nicolas Dumazet <ndumazet@google.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 900113376d4e..36b85bd05ac8 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3119,6 +3119,8 @@ static void addrconf_gre_config(struct net_device *dev)
 	}
 
 	addrconf_addr_gen(idev, true);
+	if (dev->flags & IFF_POINTOPOINT)
+		addrconf_add_mroute(dev);
 }
 #endif