diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index 26569a00b40cf247ed46c6ac292f4896dbf06db7..003a92857102c586b4ad45de32e2f1cc4eb59e0a 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -3755,7 +3755,7 @@ static void i915_irq_preinstall(struct drm_device * dev)
 
 	i9xx_pipestat_irq_reset(dev_priv);
 
-	I915_WRITE16(HWSTAM, 0xeffe);
+	I915_WRITE(HWSTAM, 0xffffeffe);
 
 	GEN3_IRQ_RESET();
 }
@@ -3862,7 +3862,7 @@ static void i915_irq_uninstall(struct drm_device * dev)
 
 	i9xx_pipestat_irq_reset(dev_priv);
 
-	I915_WRITE16(HWSTAM, 0xffff);
+	I915_WRITE(HWSTAM, 0xffffffff);
 
 	GEN3_IRQ_RESET();
 }