From 3f4207db6621fa6803b5e3a21f8d87c67ec403c4 Mon Sep 17 00:00:00 2001
From: "Nagaraj, Suresh" <suresh.nagaraj@intel.com>
Date: Tue, 13 Feb 2018 03:04:34 +0100
Subject: [PATCH] Merge pull request #248 in SW_PON/linux from
bugfix/UGW_SW-21667-getting-json-error-during-automation-run-in-prt-pta to
xrx500
* commit 'c774259112f0845d6917fdf0c69f723665fc45ca':
UGW_SW-21667: avoid piggybacked FIN for TSO packets
---
net/ipv4/tcp_output.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 493876cfa..41ba0f6eb 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2968,7 +2968,13 @@ void tcp_send_fin(struct sock *sk)
* Note: in the latter case, FIN packet will be sent after a timeout,
* as TCP stack thinks it has already been transmitted.
*/
+#ifdef CONFIG_LTQ_TOE_DRIVER
+ /* don't piggyback the FIN for large packets (TSO)
+ bug in HW will add FIN flag for all the segmented packets */
+ if (tskb && (tcp_send_head(sk) || tcp_under_memory_pressure(sk)) && (tskb->len < tcp_current_mss(sk))) {
+#else
if (tskb && (tcp_send_head(sk) || tcp_under_memory_pressure(sk))) {
+#endif
coalesce:
TCP_SKB_CB(tskb)->tcp_flags |= TCPHDR_FIN;
TCP_SKB_CB(tskb)->end_seq++;
--
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