From e03c2c321a84035503a9daba02f887cc8d34f842 Mon Sep 17 00:00:00 2001
From: zhanghongyu <zhanghongyu@xiaomi.com>
Date: Tue, 26 Jul 2022 14:03:48 +0800
Subject: [PATCH] tcp: reset conn->nrtx when ack received

Otherwise, when a long test triggers multiple timeout retransmissions,
the late timeout retransmissions are always delayed between 24 and 48 seconds

Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
---
 net/tcp/tcp_input.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/tcp/tcp_input.c b/net/tcp/tcp_input.c
index f51c17a4cf..0c65a515f4 100644
--- a/net/tcp/tcp_input.c
+++ b/net/tcp/tcp_input.c
@@ -773,6 +773,7 @@ found:
                     tcp_getsequence(conn->sndseq), ackseq, unackseq,
                     (uint32_t)conn->tx_unacked);
               tcp_setsequence(conn->sndseq, ackseq);
+              conn->nrtx = 0;
             }
         }
 #endif