[dpdk-stable] patch 'net/mlx5: fix default queue number in RSS flow rule' has been queued to stable release 20.11.3

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 20.11.3

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 08/05/21. 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/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/4ac789fddc852fc8d33eba4f04ff54ec854ca279

Thanks.

Luca Boccassi

---
>From 4ac789fddc852fc8d33eba4f04ff54ec854ca279 Mon Sep 17 00:00:00 2001
From: Lior Margalit <lmargalit at nvidia.com>
Date: Tue, 27 Jul 2021 09:46:20 +0300
Subject: [PATCH] net/mlx5: fix default queue number in RSS flow rule

[ upstream commit 4a5a1e6b624e46f24b13d095e35a9b8699bd59b9 ]

The selection flags for the RX hash define how the received packets will
be distributed between multiple queues.
When creating a new TIR, the queue_num is set to 1 if none of the selection
flags is set.

Applied the same to the RSS desc before checking if it matches a cached
TIR object to save creating a new object every time.

Fixes: fabf8a37241c ("net/mlx5: fix shared RSS action release")

Signed-off-by: Lior Margalit <lmargalit at nvidia.com>
Acked-by: Matan Azrad <matan at nvidia.com>
---
 drivers/net/mlx5/mlx5_flow_dv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index 2a86b03bf9..5b2e1a9f07 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -8705,6 +8705,8 @@ flow_dv_hrxq_prepare(struct rte_eth_dev *dev,
 	rss_desc->hash_fields = dev_flow->hash_fields;
 	rss_desc->tunnel = !!(dh->layers & MLX5_FLOW_LAYER_TUNNEL);
 	rss_desc->shared_rss = 0;
+	if (rss_desc->hash_fields == 0)
+		rss_desc->queue_num = 1;
 	*hrxq_idx = mlx5_hrxq_get(dev, rss_desc);
 	if (!*hrxq_idx)
 		return NULL;
-- 
2.30.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-08-03 12:35:08.603686799 +0100
+++ 0009-net-mlx5-fix-default-queue-number-in-RSS-flow-rule.patch	2021-08-03 12:35:08.214818729 +0100
@@ -1 +1 @@
-From 4a5a1e6b624e46f24b13d095e35a9b8699bd59b9 Mon Sep 17 00:00:00 2001
+From 4ac789fddc852fc8d33eba4f04ff54ec854ca279 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 4a5a1e6b624e46f24b13d095e35a9b8699bd59b9 ]
+
@@ -15 +16,0 @@
-Cc: stable at dpdk.org
@@ -24 +25 @@
-index 0538c8565c..7f07e3d800 100644
+index 2a86b03bf9..5b2e1a9f07 100644
@@ -27 +28 @@
-@@ -10985,6 +10985,8 @@ flow_dv_hrxq_prepare(struct rte_eth_dev *dev,
+@@ -8705,6 +8705,8 @@ flow_dv_hrxq_prepare(struct rte_eth_dev *dev,