patch 'net/bnxt: fix speed change from 200G to 25G on Thor' has been queued to stable release 22.11.5

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 22.11.5

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 03/09/24. 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/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/61fe7465490bc4463d4d1182215d47414b1dbd9e

Thanks.

Luca Boccassi

---
>From 61fe7465490bc4463d4d1182215d47414b1dbd9e Mon Sep 17 00:00:00 2001
From: Kalesh AP <kalesh-anakkur.purayil at broadcom.com>
Date: Sat, 4 Nov 2023 22:31:07 -0700
Subject: [PATCH] net/bnxt: fix speed change from 200G to 25G on Thor

[ upstream commit 753b8ff26162ffaf118c03e47ab75cfd2229d4e8 ]

While forcing speed to 200G, driver sets the structure variable
"bp->link_info->link_signal_mode" value to BNXT_SIG_MODE_PAM4.
After that when the user forces the speed back to 25G, this
cached value is not set back to BNXT_SIG_MODE_NRZ which results
in issuing the HWRM_PORT_PHY_CFG command with wrong inputs.

Fixes: c23f9ded0391 ("net/bnxt: support 200G PAM4 link")

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil at broadcom.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde at broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur at broadcom.com>
---
 drivers/net/bnxt/bnxt_hwrm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index 45f92ff558..098f84fbae 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -3005,6 +3005,7 @@ static uint16_t bnxt_parse_eth_link_speed(uint32_t conf_link_speed,
 	case RTE_ETH_LINK_SPEED_25G:
 		eth_link_speed =
 			HWRM_PORT_PHY_CFG_INPUT_AUTO_LINK_SPEED_25GB;
+		link_info->link_signal_mode = BNXT_SIG_MODE_NRZ;
 		break;
 	case RTE_ETH_LINK_SPEED_40G:
 		eth_link_speed =
-- 
2.39.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2024-03-07 01:05:42.118157918 +0000
+++ 0087-net-bnxt-fix-speed-change-from-200G-to-25G-on-Thor.patch	2024-03-07 01:05:34.970943666 +0000
@@ -1 +1 @@
-From 753b8ff26162ffaf118c03e47ab75cfd2229d4e8 Mon Sep 17 00:00:00 2001
+From 61fe7465490bc4463d4d1182215d47414b1dbd9e Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 753b8ff26162ffaf118c03e47ab75cfd2229d4e8 ]
+
@@ -13 +14,0 @@
-Cc: stable at dpdk.org
@@ -23 +24 @@
-index 8f37077522..441e3aef51 100644
+index 45f92ff558..098f84fbae 100644
@@ -26 +27 @@
-@@ -3191,6 +3191,7 @@ static uint16_t bnxt_parse_eth_link_speed(uint32_t conf_link_speed,
+@@ -3005,6 +3005,7 @@ static uint16_t bnxt_parse_eth_link_speed(uint32_t conf_link_speed,
@@ -29 +30 @@
- 			HWRM_PORT_PHY_CFG_INPUT_FORCE_LINK_SPEED_25GB;
+ 			HWRM_PORT_PHY_CFG_INPUT_AUTO_LINK_SPEED_25GB;