tree b8e26b3e31c6db69e4c5ce38c6150016495195b8
parent 8b63ec1837fa4c1ea604b278d201454eb3b85066
author huaibin Wang <huaibin.wang@6wind.com> 1440512434 +0200
committer David S. Miller <davem@davemloft.net> 1440538380 -0700

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: c12b395a4664 ("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>