ipv4: Make caller provide on-stack flow key to ip_route_output_ports().

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/l2tp/l2tp_ip.c b/net/l2tp/l2tp_ip.c
index a4d2dfa..8189960 100644
--- a/net/l2tp/l2tp_ip.c
+++ b/net/l2tp/l2tp_ip.c
@@ -471,6 +471,7 @@
 
 	if (rt == NULL) {
 		struct ip_options_rcu *inet_opt;
+		struct flowi4 fl4;
 
 		rcu_read_lock();
 		inet_opt = rcu_dereference(inet->inet_opt);
@@ -485,7 +486,7 @@
 		 * keep trying until route appears or the connection times
 		 * itself out.
 		 */
-		rt = ip_route_output_ports(sock_net(sk), sk,
+		rt = ip_route_output_ports(sock_net(sk), &fl4, sk,
 					   daddr, inet->inet_saddr,
 					   inet->inet_dport, inet->inet_sport,
 					   sk->sk_protocol, RT_CONN_FLAGS(sk),