Re: [PATCH mlx5-next 3/7] vfio/pci_core: Make the region->release() function optional

[Max Gurtovoy]

On 9/22/2021 1:38 PM, Leon Romanovsky wrote:
> From: Yishai Hadas <yishaih@xxxxxxxxxx>
>
> Make the region->release() function optional as in some cases there is
> nothing to do by driver as part of it.
>
> This is needed for coming patch from this series once we add
> mlx5_vfio_cpi driver to support live migration but we don't need a

mlx5_vfio_pci *typo


> migration release function.
>
> Signed-off-by: Yishai Hadas <yishaih@xxxxxxxxxx>
> Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
> ---
>   drivers/vfio/pci/vfio_pci_core.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c
> index 68198e0f2a63..3ddc3adb24de 100644
> --- a/drivers/vfio/pci/vfio_pci_core.c
> +++ b/drivers/vfio/pci/vfio_pci_core.c
> @@ -341,7 +341,8 @@ void vfio_pci_core_disable(struct vfio_pci_core_device *vdev)
>   	vdev->virq_disabled = false;
>   
>   	for (i = 0; i < vdev->num_regions; i++)
> -		vdev->region[i].ops->release(vdev, &vdev->region[i]);
> +		if (vdev->region[i].ops->release)
> +			vdev->region[i].ops->release(vdev, &vdev->region[i]);
>   
>   	vdev->num_regions = 0;
>   	kfree(vdev->region);

Looks good,

Reviewed-by: Max Gurtovoy <mgurtovoy@xxxxxxxxxx>