[Intel-gfx] [PATCH 4/4] drm/i915: Park before resetting the submission backend

[Chris Wilson]

Quoting Chris Wilson (2018-04-05 13:17:24)
> Quoting Sagar Arun Kamble (2018-04-05 12:54:38)
> > With GuC, hitting the GEM_BUG_ON(awake) in guc_submission_enable.
> 
> Hmm. We definitely need to keep park/unpark balanced. Brute force would
> be to force idle at that point. Or we do if (awake) engine->unpark on
> the takeover.

I think since we are only gt.awake due to the early context copying, we
are actually idle here just haven't yet run the idle worker. Brute
forcing the park doesn't seem so bad.
-Chris