io/drm/i915_irq.c

438 	de_ier = I915_READ(DEIER);
439 	I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
440 	(void)I915_READ(DEIER);
479 	I915_WRITE(DEIER, de_ier);
480 	(void)I915_READ(DEIER);
768 		I915_WRITE(DEIER, dev_priv->de_irq_enable_reg);
769 		(void) I915_READ(DEIER);
786 		I915_WRITE(DEIER, dev_priv->de_irq_enable_reg);
787 		(void) I915_READ(DEIER);
900        I915_WRITE(DEIER, 0x0);
901        (void) I915_READ(DEIER);
923        I915_WRITE(DEIER, dev_priv->de_irq_enable_reg);
924        (void) I915_READ(DEIER);
945        I915_WRITE(DEIER, 0x0);