patch 'vdpa/mlx5: workaround queue stop with traffic' has been queued to stable release 20.11.5

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 20.11.5

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/20/22. 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/16ba91d4f3c0bd6d03b2ed5a4f09842ec8b0de73

Thanks.

Luca Boccassi

---
>From 16ba91d4f3c0bd6d03b2ed5a4f09842ec8b0de73 Mon Sep 17 00:00:00 2001
From: Matan Azrad <matan at nvidia.com>
Date: Mon, 22 Nov 2021 15:12:35 +0200
Subject: [PATCH] vdpa/mlx5: workaround queue stop with traffic

[ upstream commit b5e51edfbe18ee30b8fed5efdb09f2ab4c8a05a0 ]

When the event thread polls traffic and a virtq is stopping, the FW loses
synchronization in the virtq indexes.

It causes LM failure on synchronization between the HOST indexes to
the GUEST indexes.

Unset the event thread before the queue stop in the LM process.

Fixes: 31b9c29c86af ("vdpa/mlx5: support close and config operations")

Signed-off-by: Matan Azrad <matan at nvidia.com>
Acked-by: Xueming Li <xuemingl at nvidia.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>
---
 drivers/vdpa/mlx5/mlx5_vdpa.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/vdpa/mlx5/mlx5_vdpa.c b/drivers/vdpa/mlx5/mlx5_vdpa.c
index 38a93d041d..06e602e72a 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa.c
+++ b/drivers/vdpa/mlx5/mlx5_vdpa.c
@@ -281,10 +281,10 @@ mlx5_vdpa_dev_close(int vid)
 		DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name);
 		return -1;
 	}
-	if (priv->configured)
-		ret |= mlx5_vdpa_lm_log(priv);
 	mlx5_vdpa_err_event_unset(priv);
 	mlx5_vdpa_cqe_event_unset(priv);
+	if (priv->configured)
+		ret |= mlx5_vdpa_lm_log(priv);
 	mlx5_vdpa_steer_unset(priv);
 	mlx5_vdpa_virtqs_release(priv);
 	mlx5_vdpa_event_qp_global_release(priv);
-- 
2.30.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2022-02-18 12:37:40.310942302 +0000
+++ 0060-vdpa-mlx5-workaround-queue-stop-with-traffic.patch	2022-02-18 12:37:37.694792009 +0000
@@ -1 +1 @@
-From b5e51edfbe18ee30b8fed5efdb09f2ab4c8a05a0 Mon Sep 17 00:00:00 2001
+From 16ba91d4f3c0bd6d03b2ed5a4f09842ec8b0de73 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit b5e51edfbe18ee30b8fed5efdb09f2ab4c8a05a0 ]
+
@@ -15 +16,0 @@
-Cc: stable at dpdk.org
@@ -25 +26 @@
-index b9e84dd9bf..8dfaba791d 100644
+index 38a93d041d..06e602e72a 100644
@@ -28 +29 @@
-@@ -250,10 +250,10 @@ mlx5_vdpa_dev_close(int vid)
+@@ -281,10 +281,10 @@ mlx5_vdpa_dev_close(int vid)