[Intel-gfx] [PATCH] drm/i915: Revert "drm/i915: Reject the pin ioctl on gen6+"

[Damien Lespiau]

Hi Dave,

On Fri, Oct 03, 2014 at 07:12:53AM +1000, Dave Airlie wrote:
> I thought we had an agreement that no features that were specific to
> the non-open source userspace drivers would be merged to the kernel,
> due to security and maintenance concerns, i.e. exactly this concern,
> we now have to maintain an interface that we can't regression test in
> public.

Actually, the pin ioctl() has been here for quite some time, since the
introduction of GEM, see: 

  http://lwn.net/Articles/283798/ section 8.2

That's why one side is arguing that it's not acceptable to break
user-space (open or closed , it doesn't matter at this point).

Daniel is saying that's a legacy artefact and it shouldn't be used
anymore, but breaking a user-space application is enough for me to at
least suggest a revert.

HTH,

-- 
Damien