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drm/i915: Drop the extra GEN8_PCU_IIR posting read from cherryview_irq_preinstall()

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Looks like a leftover POSTING_READ(GEN8_PCU_IIR) in
cherryview_irq_preinstall() from some earlier age. GEN5_IRQ_RESET()
already does the posting read so this changes nothing, so kill it.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Ville Syrjälä 2014-10-30 19:42:53 +02:00 committed by Daniel Vetter
parent a2c30fbafc
commit 8e20599ae1
1 changed files with 0 additions and 2 deletions
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2
drivers/gpu/drm/i915/i915_irq.c
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@ -3188,8 +3188,6 @@ static void cherryview_irq_preinstall(struct drm_device *dev)
GEN5_IRQ_RESET(GEN8_PCU_);
POSTING_READ(GEN8_PCU_IIR);
I915_WRITE(DPINVGTT, DPINVGTT_STATUS_MASK_CHV);
I915_WRITE(PORT_HOTPLUG_EN, 0);