[Intel-gfx] [PATCH 1/2] drm/i915: Avoid setting ring freq on invalid rps freqs

[Chris Wilson]

Quoting Mika Kuoppala (2018-03-20 15:17:33)
> Looping through rps frequencies when both min and max are zero
> ends up into an endless loop. This can happen during hardware
> enablement.
> 
> Bail out early if rps frequencies are not correctly set yet.
> 
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris