[PATCH net] net: vrf: fix remove vrf module error when there's no reference

[linmiaohe]

From: Miaohe Lin <linmia...@huawei.com>

If we insmod vrf.ko, there is no way to remove it because of lack of 
module_exit.
I think we may need it.

Signed-off-by: Miaohe Lin <linmia...@huawei.com>
---
 drivers/net/vrf.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
index 7c1430ed0244..0e93690482d4 100644
--- a/drivers/net/vrf.c
+++ b/drivers/net/vrf.c
@@ -1462,7 +1462,15 @@ static int __init vrf_init_module(void)
        return rc;
 }

+static void __exit vrf_fini_module(void)
+{
+       rtnl_link_unregister(&vrf_link_ops);
+       unregister_pernet_subsys(&vrf_net_ops);
+       unregister_netdevice_notifier(&vrf_notifier_block);
+}
+
 module_init(vrf_init_module);
+module_exit(vrf_fini_module);
 MODULE_AUTHOR("Shrijeet Mukherjee, David Ahern");
 MODULE_DESCRIPTION("Device driver to instantiate VRF domains");
 MODULE_LICENSE("GPL");
-- 
2.16.2