[Intel-gfx] [PATCH v4] drm/i915: clear error registers after error capture

[Chris Wilson]

Quoting Lionel Landwerlin (2018-08-30 14:24:24)
> We need to clear the register in order to get correct value after the
> next potential hang.
> 
> v2: Centralize error register clearing in i915_irq.c (Chris)
> 
> v3: Don't read gen8 register on < gen6 (Chris)
> 
> v4: Don't swap gen8+ & gen6+ code... (Chris)
> 
> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
> Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
Lgtm,
-Chris