diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index e2b9583ed96abc8da45121128210afdfcf4e5d23..e37488d3453f03b68928718a69559581b436812b 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -238,9 +238,14 @@ static void tcp_measure_rcv_mss(struct sock *sk, const struct sk_buff *skb)
 		 */
 		if (unlikely(len != icsk->icsk_ack.rcv_mss)) {
 			u64 val = (u64)skb->len << TCP_RMEM_TO_WIN_SCALE;
+			u8 old_ratio = tcp_sk(sk)->scaling_ratio;
 
 			do_div(val, skb->truesize);
 			tcp_sk(sk)->scaling_ratio = val ? val : 1;
+
+			if (old_ratio != tcp_sk(sk)->scaling_ratio)
+				WRITE_ONCE(tcp_sk(sk)->window_clamp,
+					   tcp_win_from_space(sk, sk->sk_rcvbuf));
 		}
 		icsk->icsk_ack.rcv_mss = min_t(unsigned int, len,
 					       tcp_sk(sk)->advmss);
@@ -754,7 +759,8 @@ void tcp_rcv_space_adjust(struct sock *sk)
 	 * <prev RTT . ><current RTT .. ><next RTT .... >
 	 */
 
-	if (READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_moderate_rcvbuf)) {
+	if (READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_moderate_rcvbuf) &&
+	    !(sk->sk_userlocks & SOCK_RCVBUF_LOCK)) {
 		u64 rcvwin, grow;
 		int rcvbuf;
 
@@ -770,22 +776,12 @@ void tcp_rcv_space_adjust(struct sock *sk)
 
 		rcvbuf = min_t(u64, tcp_space_from_win(sk, rcvwin),
 			       READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_rmem[2]));
-		if (!(sk->sk_userlocks & SOCK_RCVBUF_LOCK)) {
-			if (rcvbuf > sk->sk_rcvbuf) {
-				WRITE_ONCE(sk->sk_rcvbuf, rcvbuf);
-
-				/* Make the window clamp follow along.  */
-				WRITE_ONCE(tp->window_clamp,
-					   tcp_win_from_space(sk, rcvbuf));
-			}
-		} else {
-			/* Make the window clamp follow along while being bounded
-			 * by SO_RCVBUF.
-			 */
-			int clamp = tcp_win_from_space(sk, min(rcvbuf, sk->sk_rcvbuf));
+		if (rcvbuf > sk->sk_rcvbuf) {
+			WRITE_ONCE(sk->sk_rcvbuf, rcvbuf);
 
-			if (clamp > tp->window_clamp)
-				WRITE_ONCE(tp->window_clamp, clamp);
+			/* Make the window clamp follow along.  */
+			WRITE_ONCE(tp->window_clamp,
+				   tcp_win_from_space(sk, rcvbuf));
 		}
 	}
 	tp->rcvq_space.space = copied;