ipv4: Make output route lookup return rtable directly.

Instead of on the stack.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rxrpc/ar-peer.c b/net/rxrpc/ar-peer.c
index a53fb25..3620c56 100644
--- a/net/rxrpc/ar-peer.c
+++ b/net/rxrpc/ar-peer.c
@@ -37,7 +37,6 @@
 {
 	struct rtable *rt;
 	struct flowi fl;
-	int ret;
 
 	peer->if_mtu = 1500;
 
@@ -58,9 +57,9 @@
 		BUG();
 	}
 
-	ret = ip_route_output_key(&init_net, &rt, &fl);
-	if (ret < 0) {
-		_leave(" [route err %d]", ret);
+	rt = ip_route_output_key(&init_net, &fl);
+	if (IS_ERR(rt)) {
+		_leave(" [route err %ld]", PTR_ERR(rt));
 		return;
 	}