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[PATCH 3.16.y-ckt 088/126] gre6: allow to update all parameters via rtnl

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  [PATCH 3.16.y-ckt 088/126] gre6: allow to update all parameters via rtnl Luis Henriques <luis.henriques@canonical.com> - 2016-01-06 12:00 +0100

#1302610 — [PATCH 3.16.y-ckt 088/126] gre6: allow to update all parameters via rtnl

3.16.7-ckt22 -stable review patch.  If anyone has any objections, please let me know.

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

From: Nicolas Dichtel <nicolas.dichtel@6wind.com>

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@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Luis Henriques <luis.henriques@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;
 }
 
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