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ip6_gre: release cached dst on tunnel removal
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>
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@ -361,6 +361,7 @@ static void ip6gre_tunnel_uninit(struct net_device *dev)
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struct ip6gre_net *ign = net_generic(t->net, ip6gre_net_id);
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ip6gre_tunnel_unlink(ign, t);
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ip6_tnl_dst_reset(t);
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dev_put(dev);
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}
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