[Intel-gfx] [PATCH v1 5/5] vfio: Check the presence for iommufd callbacks in __vfio_register_dev()

[Jason Gunthorpe]

On Fri, Mar 10, 2023 at 02:12:21PM +0000, Liu, Yi L wrote:

> > The ops are NULL if !CONFIG_IOMMUFD. The previous code was OK
> > because
> > it checked for non-null bind before demanding the others be non-null.
> 
> Now we want the no-dma drivers to reuse the emulated iommu op set,
> so if CONFIG_IOMMUFD==y, bind_iommufd/unbind_iommufd/attach_ioas
> should be non-null for all the drivers registered to vfio. Is it?

Yes

Jason