xfrm6_tunnel: join error paths using goto

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/xfrm6_tunnel.c b/net/ipv6/xfrm6_tunnel.c
index c2b2781..80193db 100644 (file)
--- a/net/ipv6/xfrm6_tunnel.c
+++ b/net/ipv6/xfrm6_tunnel.c
@@ -345,24 +345,23 @@ static struct xfrm6_tunnel xfrm46_tunnel_handler = {
 static int __init xfrm6_tunnel_init(void)
 {
        if (xfrm_register_type(&xfrm6_tunnel_type, AF_INET6) < 0)
-               return -EAGAIN;
-
-       if (xfrm6_tunnel_register(&xfrm6_tunnel_handler, AF_INET6)) {
-               xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
-               return -EAGAIN;
-       }
-       if (xfrm6_tunnel_register(&xfrm46_tunnel_handler, AF_INET)) {
-               xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6);
-               xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
-               return -EAGAIN;
-       }
-       if (xfrm6_tunnel_spi_init() < 0) {
-               xfrm6_tunnel_deregister(&xfrm46_tunnel_handler, AF_INET);
-               xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6);
-               xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
-               return -EAGAIN;
-       }
+               goto err;
+       if (xfrm6_tunnel_register(&xfrm6_tunnel_handler, AF_INET6))
+               goto unreg;
+       if (xfrm6_tunnel_register(&xfrm46_tunnel_handler, AF_INET))
+               goto dereg6;
+       if (xfrm6_tunnel_spi_init() < 0)
+               goto dereg46;
        return 0;
+
+dereg46:
+       xfrm6_tunnel_deregister(&xfrm46_tunnel_handler, AF_INET);
+dereg6:
+       xfrm6_tunnel_deregister(&xfrm6_tunnel_handler, AF_INET6);
+unreg:
+       xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6);
+err:
+       return -EAGAIN;
 }
 
 static void __exit xfrm6_tunnel_fini(void)