[incubator-nuttx] 05/05: tcp_data_event: Add a comment

[xi...@apache.org]

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commit 7ac6c0a8de539c7034a022cde99b67d77ad74f52
Author: YAMAMOTO Takashi <ya...@midokura.com>
AuthorDate: Fri May 28 17:44:13 2021 +0900

    tcp_data_event: Add a comment
---
 net/tcp/tcp_callback.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/tcp/tcp_callback.c b/net/tcp/tcp_callback.c
index c717512..591cb78 100644
--- a/net/tcp/tcp_callback.c
+++ b/net/tcp/tcp_callback.c
@@ -96,7 +96,11 @@ tcp_data_event(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn,
 #ifdef CONFIG_NET_STATISTICS
           g_netstats.tcp.drop++;
 #endif
-          /* Clear the TCP_SNDACK bit so that no ACK will be sent */
+          /* Clear the TCP_SNDACK bit so that no ACK will be sent.
+           *
+           * Revisit: It might make more sense to send a dup ack
+           * to give a hint to the peer.
+           */
 
           ret &= ~TCP_SNDACK;
         }