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-rw-r--r--shared-core/i915_irq.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/shared-core/i915_irq.c b/shared-core/i915_irq.c
index 5da54107..4047e77e 100644
--- a/shared-core/i915_irq.c
+++ b/shared-core/i915_irq.c
@@ -294,6 +294,8 @@ irqreturn_t i915_driver_irq_handler(DRM_IRQ_ARGS)
return IRQ_NONE;
I915_WRITE16(I915REG_INT_IDENTITY_R, temp);
+ (void) I915_READ16(I915REG_INT_IDENTITY_R);
+ DRM_READMEMORYBARRIER();
dev_priv->sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv);