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-rw-r--r--drivers/gpu/drm/i915/i915_irq.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index c3ceffa46ea..aa7fd82aa6e 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -254,10 +254,15 @@ irqreturn_t igdng_irq_handler(struct drm_device *dev)
{
drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private;
int ret = IRQ_NONE;
- u32 de_iir, gt_iir;
+ u32 de_iir, gt_iir, de_ier;
u32 new_de_iir, new_gt_iir;
struct drm_i915_master_private *master_priv;
+ /* disable master interrupt before clearing iir */
+ de_ier = I915_READ(DEIER);
+ I915_WRITE(DEIER, de_ier & ~DE_MASTER_IRQ_CONTROL);
+ (void)I915_READ(DEIER);
+
de_iir = I915_READ(DEIIR);
gt_iir = I915_READ(GTIIR);
@@ -290,6 +295,9 @@ irqreturn_t igdng_irq_handler(struct drm_device *dev)
gt_iir = new_gt_iir;
}
+ I915_WRITE(DEIER, de_ier);
+ (void)I915_READ(DEIER);
+
return ret;
}