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* [PATCH] vdpa/mlx5: workaround queue stop with traffic
@ 2021-11-22 13:12 Matan Azrad
  2022-01-26 13:20 ` Maxime Coquelin
  2022-01-27  5:10 ` Xia, Chenbo
  0 siblings, 2 replies; 3+ messages in thread
From: Matan Azrad @ 2021-11-22 13:12 UTC (permalink / raw)
  To: Maxime Coquelin; +Cc: dev, stable, Xueming Li

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


^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2022-01-27  5:10 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2021-11-22 13:12 [PATCH] vdpa/mlx5: workaround queue stop with traffic Matan Azrad
2022-01-26 13:20 ` Maxime Coquelin
2022-01-27  5:10 ` Xia, Chenbo

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