dccp: Use cork flow in dccp_v4_connect()

Since this is invoked from inet_stream_connect() the socket is locked
and therefore this usage is safe.

Signed-off-by: David S. Miller <davem@davemloft.net>

net/dccp/ipv4.c

@@ -45,7 +45,7 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 	struct dccp_sock *dp = dccp_sk(sk);
 	__be16 orig_sport, orig_dport;
 	__be32 daddr, nexthop;
-	struct flowi4 fl4;
+	struct flowi4 *fl4;
 	struct rtable *rt;
 	int err;
 	struct ip_options_rcu *inet_opt;
@@ -70,7 +70,8 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 
 	orig_sport = inet->inet_sport;
 	orig_dport = usin->sin_port;
-	rt = ip_route_connect(&fl4, nexthop, inet->inet_saddr,
+	fl4 = &inet->cork.fl.u.ip4;
+	rt = ip_route_connect(fl4, nexthop, inet->inet_saddr,
 			      RT_CONN_FLAGS(sk), sk->sk_bound_dev_if,
 			      IPPROTO_DCCP,
 			      orig_sport, orig_dport, sk, true);
@@ -83,10 +84,10 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 	}
 
 	if (inet_opt == NULL || !inet_opt->opt.srr)
-		daddr = fl4.daddr;
+		daddr = fl4->daddr;
 
 	if (inet->inet_saddr == 0)
-		inet->inet_saddr = fl4.saddr;
+		inet->inet_saddr = fl4->saddr;
 	inet->inet_rcv_saddr = inet->inet_saddr;
 
 	inet->inet_dport = usin->sin_port;
@@ -106,7 +107,7 @@ int dccp_v4_connect(struct sock *sk, struct sockaddr *uaddr, int addr_len)
 	if (err != 0)
 		goto failure;
 
-	rt = ip_route_newports(&fl4, rt, orig_sport, orig_dport,
+	rt = ip_route_newports(fl4, rt, orig_sport, orig_dport,
 			       inet->inet_sport, inet->inet_dport, sk);
 	if (IS_ERR(rt)) {
 		rt = NULL;