[Intel-gfx] [PATCH v14 22/26] vfio: Add VFIO_DEVICE_BIND_IOMMUFD

[Jason Gunthorpe]

On Sat, Jul 15, 2023 at 04:16:52AM +0000, Liu, Yi L wrote:
> > From: Jason Gunthorpe <jgg at nvidia.com>
> > Sent: Friday, July 14, 2023 10:42 PM
> > 
> > On Mon, Jul 10, 2023 at 07:59:24PM -0700, Yi Liu wrote:
> > 
> > > +static inline long vfio_df_ioctl_bind_iommufd(struct vfio_device_file *df,
> > > +					      struct vfio_device_bind_iommufd __user
> > *arg)
> > > +{
> > > +	return -EOPNOTSUPP;
> > > +}
> > 
> > This should be -ENOTTY
> 
> Okay. Since there are quite a few stub functions in the drivers/vfio/vfio.h.
> Let me check the rule. All the stub functions should return -ENOTTY in
> the !IS_ENABLED(CONFIG_XXX) case, if the function returns int., is
> it?

No, just ioctl returns ENOTTY, so really just this function.

Jason