[dpdk-stable] patch 'net/bnxt: fix ring group free' has been queued to stable release 20.11.4

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 20.11.4

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/12/21. 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/steevenlee/dpdk

This queued commit can be viewed at:
https://github.com/steevenlee/dpdk/commit/8516f354566076ec8b8fd454cf29bf4175282871

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From 8516f354566076ec8b8fd454cf29bf4175282871 Mon Sep 17 00:00:00 2001
From: Kalesh AP <kalesh-anakkur.purayil at broadcom.com>
Date: Mon, 30 Aug 2021 09:28:11 +0530
Subject: [PATCH] net/bnxt: fix ring group free
Cc: Xueming Li <xuemingl at nvidia.com>

[ upstream commit 8269a4e8af5fa7632578fc1f4fa7d44711440e4f ]

Added an invalid fw_grp_id check inside bnxt_hwrm_ring_grp_free().
This will prevent invalid fw_grp_id to be passed to the FW which can
result in an error.
This fixes the following failure in the "port stop" -> "port start"
sequence:

bnxt_hwrm_ring_grp_free(): error 2:0:00000000:0204
bnxt_hwrm_ring_grp_free(): error 2:0:00000000:0204

Fixes: 9b63c6fd70e3 ("net/bnxt: support Rx/Tx queue start/stop")

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil at broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde at broadcom.com>
Reviewed-by: Lance Richardson <lance.richardson at broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur at broadcom.com>
---
 drivers/net/bnxt/bnxt_hwrm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index 7d9939d1af..d8ff3c7920 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -1761,6 +1761,9 @@ int bnxt_hwrm_ring_grp_free(struct bnxt *bp, unsigned int idx)
 	struct hwrm_ring_grp_free_input req = {.req_type = 0 };
 	struct hwrm_ring_grp_free_output *resp = bp->hwrm_cmd_resp_addr;
 
+	if (bp->grp_info[idx].fw_grp_id == INVALID_HW_RING_ID)
+		return 0;
+
 	HWRM_PREP(&req, HWRM_RING_GRP_FREE, BNXT_USE_CHIMP_MB);
 
 	req.ring_group_id = rte_cpu_to_le_16(bp->grp_info[idx].fw_grp_id);
-- 
2.33.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-11-10 14:17:03.419181691 +0800
+++ 0029-net-bnxt-fix-ring-group-free.patch	2021-11-10 14:17:01.774080215 +0800
@@ -1 +1 @@
-From 8269a4e8af5fa7632578fc1f4fa7d44711440e4f Mon Sep 17 00:00:00 2001
+From 8516f354566076ec8b8fd454cf29bf4175282871 Mon Sep 17 00:00:00 2001
@@ -4,0 +5,3 @@
+Cc: Xueming Li <xuemingl at nvidia.com>
+
+[ upstream commit 8269a4e8af5fa7632578fc1f4fa7d44711440e4f ]
@@ -16 +18,0 @@
-Cc: stable at dpdk.org
@@ -27 +29 @@
-index 02613bd00b..0e0e266589 100644
+index 7d9939d1af..d8ff3c7920 100644
@@ -30 +32 @@
-@@ -1897,6 +1897,9 @@ int bnxt_hwrm_ring_grp_free(struct bnxt *bp, unsigned int idx)
+@@ -1761,6 +1761,9 @@ int bnxt_hwrm_ring_grp_free(struct bnxt *bp, unsigned int idx)