[Intel-gfx] [PATCH v2 8/9] drm/i915/uc: Stop talking with GuC when resetting

[Michal Wajdeczko]

On Wed, 22 May 2019 22:06:53 +0200, Chris Wilson  
<chris at chris-wilson.co.uk> wrote:

> Quoting Michal Wajdeczko (2019-05-22 20:32:02)
>> Knowing that GuC will be reset soon, we may stop all communication
>> immediately without doing graceful cleanup as it is not needed.
>
> The difference between stop and disable is that it avoids the
> serialisation, right? Is this patch still required -- do we still
> need the complication in two similar but subtly different paths?

This patch helps us capture any unwanted/unexpected attempts to talk
with GuC after we decided to reset it. We need 'disable' part as current
and upcoming firmware still expects us to do graceful cleanup. This may
be changed in the future releases. And we can use 'disable' as this will
break atomic_reset tests.

-Michal