[Intel-gfx] [PATCH v1.1 1/5] drm/i915: Handle return value in intel_pin_and_fence_fb_obj, v2.

[Maarten Lankhorst]

Op 24-07-15 om 15:26 schreef Ander Conselvan De Oliveira:
> On Tue, 2015-07-21 at 16:09 +0200, Maarten Lankhorst wrote:
>> -EDEADLK has special meaning in atomic, but get_fence may call
>> i915_find_fence_reg which can return -EDEADLK.
>>
>> This has special meaning in the atomic world, so convert the error
>> to -EBUSY for this case.
> Doesn't this change the behavior of intel_crtc_page_flip() slightly? It
> now would return -EBUSY to user space if it can't find a fence instead
> of -EDEADLK. Not sure if that is a problem though. I don't expect user
> space would actually check for -EDEADLK.
>
It would, but if we ever make page_flip atomic we will have to do something like this anyway..

~Maarten