diff --git a/shared-core/i915_irq.c b/shared-core/i915_irq.c
index 2287cd0..688a58e 100644
--- a/shared-core/i915_irq.c
+++ b/shared-core/i915_irq.c
@@ -425,13 +425,6 @@ u32 i915_get_vblank_counter(struct drm_device *dev, int plane)
 	if (i915_in_vblank(dev, pipe))
 		count++;
 #endif
-	/* count may be reset by other driver(e.g. 2D driver), 
-	   we have no way to know if it is wrapped or resetted 
-	   when count is zero. do a rough guess.
-	*/
-	if (count == 0 && dev->last_vblank[pipe] < dev->max_vblank_count/2)
-		dev->last_vblank[pipe] = 0; 
-	
 	return count;
 }