Re: [PATCH v7 1/4] vdpa: Add suspend operation

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Aug 10, 2022 at 07:15:09PM +0200, Eugenio Pérez wrote:
> This operation is optional: It it's not implemented, backend feature bit
> will not be exposed.
> 
> Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
> Message-Id: <20220623160738.632852-2-eperezma@redhat.com>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

What is this message id doing here?

> ---
>  include/linux/vdpa.h | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
> index 7b4a13d3bd91..d282f464d2f1 100644
> --- a/include/linux/vdpa.h
> +++ b/include/linux/vdpa.h
> @@ -218,6 +218,9 @@ struct vdpa_map_file {
>   * @reset:			Reset device
>   *				@vdev: vdpa device
>   *				Returns integer: success (0) or error (< 0)
> + * @suspend:			Suspend or resume the device (optional)
> + *				@vdev: vdpa device
> + *				Returns integer: success (0) or error (< 0)
>   * @get_config_size:		Get the size of the configuration space includes
>   *				fields that are conditional on feature bits.
>   *				@vdev: vdpa device
> @@ -319,6 +322,7 @@ struct vdpa_config_ops {
>  	u8 (*get_status)(struct vdpa_device *vdev);
>  	void (*set_status)(struct vdpa_device *vdev, u8 status);
>  	int (*reset)(struct vdpa_device *vdev);
> +	int (*suspend)(struct vdpa_device *vdev);
>  	size_t (*get_config_size)(struct vdpa_device *vdev);
>  	void (*get_config)(struct vdpa_device *vdev, unsigned int offset,
>  			   void *buf, unsigned int len);
> -- 
> 2.31.1