diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 9a09ff3afef2..4c2dd9f863f7 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -245,16 +245,16 @@ static void tcp_ecn_queue_cwr(struct tcp_sock *tp)
 		tp->ecn_flags |= TCP_ECN_QUEUE_CWR;
 }
 
-static void tcp_ecn_accept_cwr(struct tcp_sock *tp, const struct sk_buff *skb)
+static void tcp_ecn_accept_cwr(struct sock *sk, const struct sk_buff *skb)
 {
 	if (tcp_hdr(skb)->cwr) {
-		tp->ecn_flags &= ~TCP_ECN_DEMAND_CWR;
+		tcp_sk(sk)->ecn_flags &= ~TCP_ECN_DEMAND_CWR;
 
 		/* If the sender is telling us it has entered CWR, then its
 		 * cwnd may be very low (even just 1 packet), so we should ACK
 		 * immediately.
 		 */
-		tcp_enter_quickack_mode((struct sock *)tp, 2);
+		inet_csk(sk)->icsk_ack.pending |= ICSK_ACK_NOW;
 	}
 }
 
@@ -4703,7 +4703,7 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb)
 	skb_dst_drop(skb);
 	__skb_pull(skb, tcp_hdr(skb)->doff * 4);
 
-	tcp_ecn_accept_cwr(tp, skb);
+	tcp_ecn_accept_cwr(sk, skb);
 
 	tp->rx_opt.dsack = 0;