Re: [Qemu-devel] [RFC PATCH] vfio: VFIO Driver core framework

[Scott Wood]

On Thu, Nov 17, 2011 at 01:22:17PM -0700, Alex Williamson wrote:
> On Wed, 2011-11-16 at 11:52 -0500, Konrad Rzeszutek Wilk wrote:
> > On Fri, Nov 11, 2011 at 03:10:56PM -0700, Alex Williamson wrote:
> > What would be the return value if somebody tried to unmask an edge one?
> > Should that be documented here? -ENOSPEC?
> 
> I would assume EINVAL or EFAULT since the user is providing an invalid
> argument/bad address.

EINVAL.  EFAULT is normally only used for when the user passes a bad
virtual memory address to the kernel.  This isn't an address at all, it's
an index that points to an object for which this operation does not make
sense.

-Scott