[dpdk-stable] [PATCH v2] vdpa/mlx5: fix device unplug

[Xia, Chenbo]

> -----Original Message-----
> From: stable <stable-bounces at dpdk.org> On Behalf Of Matan Azrad
> Sent: Friday, May 14, 2021 2:40 AM
> To: dev at dpdk.org
> Cc: maxime.coquelin at redhat.com; stable at dpdk.org; Eli Britstein
> <elibr at nvidia.com>; Xueming Li <xuemingl at nvidia.com>
> Subject: [dpdk-stable] [PATCH v2] vdpa/mlx5: fix device unplug
> 
> The vDPA PCI device unplug process should release all the private
> device resources and also to unregister the device.
> 
> The device unregistration was missed what remained the device data
> invalid in the rte_vhost library.
> 
> Unregister the device in unplug process via the remove operation.
> 
> Fixes: 95276abaaf0a ("vdpa/mlx5: introduce Mellanox vDPA driver")
> Cc: stable at dpdk.org
> 
> Reported-by: Eli Britstein <elibr at nvidia.com>
> Signed-off-by: Matan Azrad <matan at nvidia.com>
> Tested-by: Eli Britstein <elibr at nvidia.com>
> Acked-by: Xueming Li <xuemingl at nvidia.com>
> ---
>  drivers/vdpa/mlx5/mlx5_vdpa.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> v2:
> fix spelling and email format
> 
> diff --git a/drivers/vdpa/mlx5/mlx5_vdpa.c b/drivers/vdpa/mlx5/mlx5_vdpa.c
> index 40db28b6db..e5e03e6582 100644
> --- a/drivers/vdpa/mlx5/mlx5_vdpa.c
> +++ b/drivers/vdpa/mlx5/mlx5_vdpa.c
> @@ -787,6 +787,8 @@ mlx5_vdpa_pci_remove(struct rte_pci_device *pci_dev)
>  			mlx5_glue->dv_free_var(priv->var);
>  			priv->var = NULL;
>  		}
> +		if (priv->vdev)
> +			rte_vdpa_unregister_device(priv->vdev);
>  		mlx5_glue->close_device(priv->ctx);
>  		pthread_mutex_destroy(&priv->vq_config_lock);
>  		rte_free(priv);
> --
> 2.25.1

Reviewed-by: Chenbo Xia <chenbo.xia at intel.com>