netdev - [PATCH] ipv6: assign rt6_info to inet6_ifaddr in init

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Message-Id: <1370247381-3091-1-git-send-email-gaofeng@cn.fujitsu.com>
Date:	Mon, 3 Jun 2013 16:16:21 +0800
From:	Gao feng <gaofeng@...fujitsu.com>
To:	davem@...emloft.net, yoshfuji@...ux-ipv6.org
Cc:	netdev@...r.kernel.org, jasowang@...hat.com,
	kumaran.4353@...il.com, Maruthi.Thotad@...sony.com,
	Gao feng <gaofeng@...fujitsu.com>
Subject: [PATCH] ipv6: assign rt6_info to inet6_ifaddr in init_loopback

Commit 25fb6ca4ed9cad72f14f61629b68dc03c0d9713f
"net IPv6 : Fix broken IPv6 routing table after loopback down-up"
forgot to assign rt6_info to the inet6_ifaddr.
When disable the net device, the rt6_info which allocated
in init_loopback will not be destroied in __ipv6_ifa_notify.

This will trigger the waring message below
[23527.916091] unregister_netdevice: waiting for tap0 to become free. Usage count = 1

Reported-by: Arkadiusz Miskiewicz <a.miskiewicz@...il.com>
Signed-off-by: Gao feng <gaofeng@...fujitsu.com>
---
 net/ipv6/addrconf.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index d1b2d80..1bbf744 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2658,8 +2658,10 @@ static void init_loopback(struct net_device *dev)
 			sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0);
 
 			/* Failure cases are ignored */
-			if (!IS_ERR(sp_rt))
+			if (!IS_ERR(sp_rt)) {
+				sp_ifa->rt = sp_rt;
 				ip6_ins_rt(sp_rt);
+			}
 		}
 		read_unlock_bh(&idev->lock);
 	}
-- 
1.8.1.4

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