[PATCH 07/10] vfio/mdev: Allow the mdev_parent_ops to specify the device driver to bind

[Greg Kroah-Hartman]

On Tue, Jun 15, 2021 at 03:35:16PM +0200, Christoph Hellwig wrote:
> From: Jason Gunthorpe <jgg at nvidia.com>
> 
> This allows a mdev driver to opt out of using vfio_mdev.c, instead the
> driver will provide a 'struct mdev_driver' and register directly with the
> driver core.
> 
> Much of mdev_parent_ops becomes unused in this mode:
> - create()/remove() are done via the mdev_driver probe()/remove()
> - mdev_attr_groups becomes mdev_driver driver.dev_groups
> - Wrapper function callbacks are replaced with the same ones from
>   struct vfio_device_ops
> 
> Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>
> Signed-off-by: Christoph Hellwig <hch at lst.de>

Messy, but ok...

Reviewed-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>