[Intel-gfx] [PATCH 1/2] drm/i915/gt: obey "reset" module parameter

[Rodrigo Vivi]

On Tue, Aug 18, 2020 at 12:58:00PM +0100, Chris Wilson wrote:
> Quoting Marcin Ślusarz (2020-08-18 12:36:07)
> > From: Marcin Ślusarz <marcin.slusarz at intel.com>
> > 
> > For some reason intel_gt_reset attempts to reset the GPU twice.
> > On one code path (do_reset) "reset" parameter is obeyed, but is
> > not on the other one (__intel_gt_set_wedged).
> 
> It's not that simple, we do want to force __intel_gt_set_wedged() to
> cancel whatever is running on the GPU as it is used for more than just
> failing resets (e.g. around control boundaries) regardless of what the
> user may want.
> 
> I'm loathe to add a parameter just to enable unsafe behaviour, but that
> may be the compromise.

we probably need this compromise for these cases Marcin faced...

what about moving this to intel_get_gpu_reset()?


@bool intel_has_gpu_reset(const struct intel_gt *gt)
-		if (!gt->i915->params.reset)
-			return NULL;

@ static reset_func intel_get_gpu_reset(const struct intel_gt *gt)
+		if (!gt->i915->params.reset)
+			return NULL;

> -Chris
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