diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 9f43806..4ea8ec5 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -2921,9 +2921,9 @@ static void tcp_update_rtt_min(struct sock *sk, u32 rtt_us)
 			   rtt_us ? : jiffies_to_usecs(1));
 }
 
-static inline bool tcp_ack_update_rtt(struct sock *sk, const int flag,
-				      long seq_rtt_us, long sack_rtt_us,
-				      long ca_rtt_us)
+static bool tcp_ack_update_rtt(struct sock *sk, const int flag,
+			       long seq_rtt_us, long sack_rtt_us,
+			       long ca_rtt_us, struct rate_sample *rs)
 {
 	const struct tcp_sock *tp = tcp_sk(sk);
 
@@ -2948,6 +2948,7 @@ static inline bool tcp_ack_update_rtt(struct sock *sk, const int flag,
 
 		seq_rtt_us = ca_rtt_us = delta_us;
 	}
+	rs->rtt_us = ca_rtt_us; /* RTT of last (S)ACKed packet (or -1) */
 	if (seq_rtt_us < 0)
 		return false;
 
@@ -2967,12 +2968,13 @@ static inline bool tcp_ack_update_rtt(struct sock *sk, const int flag,
 /* Compute time elapsed between (last) SYNACK and the ACK completing 3WHS. */
 void tcp_synack_rtt_meas(struct sock *sk, struct request_sock *req)
 {
+	struct rate_sample rs;
 	long rtt_us = -1L;
 
 	if (req && !req->num_retrans && tcp_rsk(req)->snt_synack)
 		rtt_us = tcp_stamp_us_delta(tcp_clock_us(), tcp_rsk(req)->snt_synack);
 
-	tcp_ack_update_rtt(sk, FLAG_SYN_ACKED, rtt_us, -1L, rtt_us);
+	tcp_ack_update_rtt(sk, FLAG_SYN_ACKED, rtt_us, -1L, rtt_us, &rs);
 }
 
 
@@ -3177,9 +3179,8 @@ static int tcp_clean_rtx_queue(struct sock *sk, int prior_fackets,
 		sack_rtt_us = tcp_stamp_us_delta(tp->tcp_mstamp, sack->first_sackt);
 		ca_rtt_us = tcp_stamp_us_delta(tp->tcp_mstamp, sack->last_sackt);
 	}
-	sack->rate->rtt_us = ca_rtt_us; /* RTT of last (S)ACKed packet, or -1 */
 	rtt_update = tcp_ack_update_rtt(sk, flag, seq_rtt_us, sack_rtt_us,
-					ca_rtt_us);
+					ca_rtt_us, sack->rate);
 
 	if (flag & FLAG_ACKED) {
 		tcp_rearm_rto(sk);
@@ -3215,7 +3216,7 @@ static int tcp_clean_rtx_queue(struct sock *sk, int prior_fackets,
 
 	if (icsk->icsk_ca_ops->pkts_acked) {
 		struct ack_sample sample = { .pkts_acked = pkts_acked,
-					     .rtt_us = ca_rtt_us,
+					     .rtt_us = sack->rate->rtt_us,
 					     .in_flight = last_in_flight };
 
 		icsk->icsk_ca_ops->pkts_acked(sk, &sample);