[3.16.y-ckt stable] Patch "gre6: allow to update all parameters via rtnl" has been added to staging queue

[Luis Henriques]

This is a note to let you know that I have just added a patch titled

    gre6: allow to update all parameters via rtnl

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt22.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

>From 9f19d52a5a919fb7c82b02b803a358825e1fac03 Mon Sep 17 00:00:00 2001
From: Nicolas Dichtel <nicolas.dichtel at 6wind.com>
Date: Thu, 3 Dec 2015 17:21:50 +0100
Subject: gre6: allow to update all parameters via rtnl

commit 6a61d4dbf4f54b5683e0f1e58d873cecca7cb977 upstream.

Parameters were updated only if the kernel was unable to find the tunnel
with the new parameters, ie only if core pamareters were updated (keys,
addr, link, type).
Now it's possible to update ttl, hoplimit, flowinfo and flags.

Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel at 6wind.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
---
 net/ipv6/ip6_gre.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index f5ea5aaf75f9..1ee013644bb2 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -1553,13 +1553,11 @@ static int ip6gre_changelink(struct net_device *dev, struct nlattr *tb[],
 			return -EEXIST;
 	} else {
 		t = nt;
-
-		ip6gre_tunnel_unlink(ign, t);
-		ip6gre_tnl_change(t, &p, !tb[IFLA_MTU]);
-		ip6gre_tunnel_link(ign, t);
-		netdev_state_change(dev);
 	}

+	ip6gre_tunnel_unlink(ign, t);
+	ip6gre_tnl_change(t, &p, !tb[IFLA_MTU]);
+	ip6gre_tunnel_link(ign, t);
 	return 0;
 }