vdpa/mlx5: fix virtq cleaning

  The HW virtq object can be destroyed ether when the device is closed or
when the state of the virtq becomes disabled.

Some parameters of the virtq should continue to be managed when the
virtq state is changed but all of them must be initialized when the
device is closed.

Wrongly, the enable parameter stayed on when the device is closed what
might cause creation of invalid virtq in the next time a device is
assigned to the driver.

Clean all the virtqs memory when the device is closed.

Fixes: c47d6e83334e ("vdpa/mlx5: support queue update")
Cc: stable@dpdk.org

Signed-off-by: Matan Azrad <matan@nvidia.com>
Acked-by: Xueming Li <xuemingl@nvidia.com>
---
 drivers/vdpa/mlx5/mlx5_vdpa_virtq.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)
  

On 3/1/21 11:41 AM, Matan Azrad wrote:
> The HW virtq object can be destroyed ether when the device is closed or

s/ether/either/

> when the state of the virtq becomes disabled.
> 
> Some parameters of the virtq should continue to be managed when the
> virtq state is changed but all of them must be initialized when the
> device is closed.
> 
> Wrongly, the enable parameter stayed on when the device is closed what
> might cause creation of invalid virtq in the next time a device is
> assigned to the driver.
> 
> Clean all the virtqs memory when the device is closed.
> 
> Fixes: c47d6e83334e ("vdpa/mlx5: support queue update")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Matan Azrad <matan@nvidia.com>
> Acked-by: Xueming Li <xuemingl@nvidia.com>
> ---
>  drivers/vdpa/mlx5/mlx5_vdpa_virtq.c | 8 ++------
>  1 file changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/vdpa/mlx5/mlx5_vdpa_virtq.c b/drivers/vdpa/mlx5/mlx5_vdpa_virtq.c
> index ef2642a..024c5c4 100644
> --- a/drivers/vdpa/mlx5/mlx5_vdpa_virtq.c
> +++ b/drivers/vdpa/mlx5/mlx5_vdpa_virtq.c
> @@ -103,13 +103,8 @@
>  	for (i = 0; i < priv->nr_virtqs; i++) {
>  		virtq = &priv->virtqs[i];
>  		mlx5_vdpa_virtq_unset(virtq);
> -		if (virtq->counters) {
> +		if (virtq->counters)
>  			claim_zero(mlx5_devx_cmd_destroy(virtq->counters));
> -			virtq->counters = NULL;
> -			memset(&virtq->reset, 0, sizeof(virtq->reset));
> -		}
> -		memset(virtq->err_time, 0, sizeof(virtq->err_time));
> -		virtq->n_retry = 0;
>  	}
>  	for (i = 0; i < priv->num_lag_ports; i++) {
>  		if (priv->tiss[i]) {
> @@ -126,6 +121,7 @@
>  		priv->virtq_db_addr = NULL;
>  	}
>  	priv->features = 0;
> +	memset(priv->virtqs, 0, sizeof(*virtq) * priv->nr_virtqs);
>  	priv->nr_virtqs = 0;
>  }
>  
> 

With typo fixed in commit message:

Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

No need to resubmit, we can fix the typo while applying.

Thanks,
Maxime
  

> -----Original Message-----
> From: stable <stable-bounces@dpdk.org> On Behalf Of Matan Azrad
> Sent: Monday, March 1, 2021 6:42 PM
> To: dev@dpdk.org
> Cc: Maxime Coquelin <maxime.coquelin@redhat.com>; stable@dpdk.org
> Subject: [dpdk-stable] [PATCH] vdpa/mlx5: fix virtq cleaning
> 
> The HW virtq object can be destroyed ether when the device is closed or
> when the state of the virtq becomes disabled.
> 
> Some parameters of the virtq should continue to be managed when the
> virtq state is changed but all of them must be initialized when the
> device is closed.
> 
> Wrongly, the enable parameter stayed on when the device is closed what
> might cause creation of invalid virtq in the next time a device is
> assigned to the driver.
> 
> Clean all the virtqs memory when the device is closed.
> 
> Fixes: c47d6e83334e ("vdpa/mlx5: support queue update")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Matan Azrad <matan@nvidia.com>
> Acked-by: Xueming Li <xuemingl@nvidia.com>
> ---
> 1.8.3.1

With commit log fixed, patch applied to next-virtio/main. Thanks!