tcp: stretch ACK fixes in Veno prep

No code logic has been changed in this patch.
Signed-off-by: Pengcheng Yang <yangpc@wangsu.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/tcp_veno.c

@@ -155,7 +155,9 @@ static void tcp_veno_cong_avoid(struct sock *sk, u32 ack, u32 acked)
 		if (tcp_in_slow_start(tp)) {
 			/* Slow start. */
 			tcp_slow_start(tp, acked);
-		} else {
+			goto done;
+		}
+
 		/* Congestion avoidance. */
 		if (veno->diff < beta) {
 			/* In the "non-congestive state", increase cwnd
@@ -177,7 +179,7 @@ static void tcp_veno_cong_avoid(struct sock *sk, u32 ack, u32 acked)
 			} else
 				tp->snd_cwnd_cnt++;
 		}
-		}
+done:
 		if (tp->snd_cwnd < 2)
 			tp->snd_cwnd = 2;
 		else if (tp->snd_cwnd > tp->snd_cwnd_clamp)