netdev - [PATCH net-next] ipv6: recreate ipv6 link-local addresses when increasing MTU over IPV6_MIN

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Message-Id: <1445870205-27202-1-git-send-email-hannes@stressinduktion.org>
Date:	Mon, 26 Oct 2015 15:36:45 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	netdev@...r.kernel.org
Cc:	Hannes Frederic Sowa <hannes@...essinduktion.org>
Subject: [PATCH net-next] ipv6: recreate ipv6 link-local addresses when increasing MTU over IPV6_MIN_MTU

Take into consideration that the interface might be disabled for IPv6,
thus switch event type.

Signed-off-by: Hannes Frederic Sowa <hannes@...essinduktion.org>
---
 net/ipv6/addrconf.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index d0c685c..c2dcebe 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3149,6 +3149,7 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
 
 	case NETDEV_UP:
 	case NETDEV_CHANGE:
+netdev_change:
 		if (dev->flags & IFF_SLAVE)
 			break;
 
@@ -3244,8 +3245,10 @@ static int addrconf_notify(struct notifier_block *this, unsigned long event,
 
 		if (!idev && dev->mtu >= IPV6_MIN_MTU) {
 			idev = ipv6_add_dev(dev);
-			if (!IS_ERR(idev))
-				break;
+			if (!IS_ERR(idev)) {
+				event = NETDEV_UP;
+				goto netdev_change;
+			}
 		}
 
 		/*
-- 
2.5.0

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