patch 'net/txgbe: fix link flow control config for Sapphire' has been queued to stable release 25.11.3

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 25.11.3

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 08/04/26. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/d70bac22751aa67d35c9ab5ec2604ecad95cb901

Thanks.

Kevin

---
>From d70bac22751aa67d35c9ab5ec2604ecad95cb901 Mon Sep 17 00:00:00 2001
From: Zaiyu Wang <zaiyuwang at trustnetic.com>
Date: Wed, 24 Jun 2026 19:52:41 +0800
Subject: [PATCH] net/txgbe: fix link flow control config for Sapphire

[ upstream commit 26e7538e0030578f49ef1f3f57825125651c2b08 ]

SP chips have a hardware bug preventing XON flow control support,
so the driver disables it.

Fixes: 69ce8c8a4ce3 ("net/txgbe: support flow control")

Signed-off-by: Zaiyu Wang <zaiyuwang at trustnetic.com>
---
 drivers/net/txgbe/base/txgbe_hw.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/txgbe/base/txgbe_hw.c b/drivers/net/txgbe/base/txgbe_hw.c
index 0d3310e15c..db45c5c0ef 100644
--- a/drivers/net/txgbe/base/txgbe_hw.c
+++ b/drivers/net/txgbe/base/txgbe_hw.c
@@ -1038,6 +1038,8 @@ s32 txgbe_fc_enable(struct txgbe_hw *hw)
 		if ((hw->fc.current_mode & txgbe_fc_tx_pause) &&
 		    hw->fc.high_water[i]) {
-			fcrtl = TXGBE_FCWTRLO_TH(hw->fc.low_water[i]) |
-				TXGBE_FCWTRLO_XON;
+			fcrtl = TXGBE_FCWTRLO_TH(hw->fc.low_water[i]);
+			/* Only AML support XON */
+			if (hw->mac.type == txgbe_mac_aml || hw->mac.type == txgbe_mac_aml40)
+				fcrtl |= TXGBE_FCWTRLO_XON;
 			fcrth = TXGBE_FCWTRHI_TH(hw->fc.high_water[i]) |
 				TXGBE_FCWTRHI_XOFF;
-- 
2.55.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2026-07-30 10:16:01.774859700 +0100
+++ 0009-net-txgbe-fix-link-flow-control-config-for-Sapphire.patch	2026-07-30 10:16:01.430990812 +0100
@@ -1 +1 @@
-From 26e7538e0030578f49ef1f3f57825125651c2b08 Mon Sep 17 00:00:00 2001
+From d70bac22751aa67d35c9ab5ec2604ecad95cb901 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 26e7538e0030578f49ef1f3f57825125651c2b08 ]
+
@@ -10 +11,0 @@
-Cc: stable at dpdk.org