From fb0ed43cbc6f34bde670ab846e7ba9e7dbf9b660 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 18 Apr 2014 20:55:49 +0100
Subject: [PATCH] sna: Refine detection of when shadow is active during
 BlockHandler

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 src/sna/sna_driver.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/sna/sna_driver.c b/src/sna/sna_driver.c
index 51f224e5..5f885137 100644
--- a/src/sna/sna_driver.c
+++ b/src/sna/sna_driver.c
@@ -632,7 +632,10 @@ static bool has_shadow(struct sna *sna)
 	if (!sna->mode.shadow_damage)
 		return false;
 
-	return RegionNotEmpty(DamageRegion(sna->mode.shadow_damage));
+	if (RegionNil(DamageRegion(sna->mode.shadow_damage)))
+		return false;
+
+	return sna->mode.shadow_flip == 0;
 }
 
 static void