[Intel-gfx] [PATCH] drm/core: Change declaration for gamma_set.

[Emil Velikov]

On 6 June 2016 at 17:00, Daniel Vetter <daniel at ffwll.ch> wrote:
> On Mon, Jun 06, 2016 at 11:18:09AM +0200, Maarten Lankhorst wrote:
>> Change return value to int to propagate errors from gamma_set,
>> and remove start parameter. Updates always use the full size,
>> and some drivers even ignore the start parameter altogether.
>
> Commit message should explain why we suddenly need to pass up the error
> code, too:
>
> "This is needed for atomic drivers, where an atomic commit can fail with
> EAGAIN and should be restarted."
>
Since that can happen only on the DRM core side, shouldn't one refrain
from adding the "always returns 0" return status for the drivers'
.gamma_set hook ? Or there's is something in the works that would lead
to drivers being able to return a non 0 value ?

Thanks
Emil