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From: Matan Azrad <matan@nvidia.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>
Cc: <dev@dpdk.org>, <stable@dpdk.org>, Xueming Li <xuemingl@nvidia.com>
Subject: [PATCH] vdpa/mlx5: workaround queue stop with traffic
Date: Mon, 22 Nov 2021 15:12:35 +0200	[thread overview]
Message-ID: <20211122131235.3270961-1-matan@nvidia.com> (raw)

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")
Cc: stable@dpdk.org

Signed-off-by: Matan Azrad <matan@nvidia.com>
Acked-by: Xueming Li <xuemingl@nvidia.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 b9e84dd9bf..8dfaba791d 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa.c
+++ b/drivers/vdpa/mlx5/mlx5_vdpa.c
@@ -250,10 +250,10 @@ 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);
-- 
2.25.1


             reply	other threads:[~2021-11-22 13:13 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-22 13:12 Matan Azrad [this message]
2022-01-26 13:20 ` Maxime Coquelin
2022-01-27  5:10 ` Xia, Chenbo

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