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ip6_gre: release cached dst on tunnel removal

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When a tunnel is deleted, the cached dst entry should be released.

This problem may prevent the removal of a netns (seen with a x-netns IPv6
gre tunnel):
  unregister_netdevice: waiting for lo to become free. Usage count = 3

CC: Dmitry Kozlov <xeb@mail.ru>
Fixes: c12b395a46 ("gre: Support GRE over IPv6")
Signed-off-by: huaibin Wang <huaibin.wang@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
huaibin Wang 2015-08-25 16:20:34 +02:00 committed by David S. Miller
parent 8b63ec1837
commit d4257295ba
1 changed files with 1 additions and 0 deletions
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net/ipv6/ip6_gre.c
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@ -361,6 +361,7 @@ static void ip6gre_tunnel_uninit(struct net_device *dev)
struct ip6gre_net *ign = net_generic(t->net, ip6gre_net_id);
ip6gre_tunnel_unlink(ign, t);
ip6_tnl_dst_reset(t);
dev_put(dev);
}