From: Paulo Zanoni <paulo.r.zanoni at intel.com> We have this POSTING_READ inside ironlake_irq_handler. I suppose we also want it on IVB because we want to stop the IRQ handler as soon as possible at this point. Also, I'll add ILK/SNB support to ivybridge_irq_handler on the next patch. Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com> --- drivers/gpu/drm/i915/i915_irq.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c index 0aa784b..5cf8b07 100644 --- a/drivers/gpu/drm/i915/i915_irq.c +++ b/drivers/gpu/drm/i915/i915_irq.c @@ -1287,6 +1287,7 @@ static irqreturn_t ivybridge_irq_handler(int irq, void *arg) /* disable master interrupt before clearing iir */ de_ier = I915_READ(DEIER); I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL); + POSTING_READ(DEIER); /* Disable south interrupts. We'll only write to SDEIIR once, so further * interrupts will will be stored on its back queue, and then we'll be -- 1.8.1.2
