From 1510dbee6885359f99ff43eb0ac7ac0a1a6a9bd3 Mon Sep 17 00:00:00 2001
From: chao an <anchao@xiaomi.com>
Date: Tue, 3 Jan 2023 13:43:00 +0800
Subject: [PATCH] net/tcp: Do not trigger retransmission if the new data has
 not been consumed.

Signed-off-by: chao an <anchao@xiaomi.com>
---
 net/tcp/tcp_send_buffered.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/tcp/tcp_send_buffered.c b/net/tcp/tcp_send_buffered.c
index bc30d4956b..e0a24e52e2 100644
--- a/net/tcp/tcp_send_buffered.c
+++ b/net/tcp/tcp_send_buffered.c
@@ -804,7 +804,8 @@ static uint16_t psock_send_eventhandler(FAR struct net_driver_s *dev,
    */
 
   if ((conn->tcpstateflags & TCP_ESTABLISHED) &&
-      (flags & (TCP_POLL | TCP_REXMIT)) &&
+      ((flags & TCP_NEWDATA) == 0) &&
+      (flags & (TCP_POLL | TCP_REXMIT | TCP_ACKDATA)) &&
       !(sq_empty(&conn->write_q)) &&
       conn->snd_wnd > 0)
     {