From 07a4400fffe4f83df3debe62abd2c37b45f8f0c0 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri, 10 May 2013 11:59:59 +0100
Subject: [PATCH] sna: Attempt to discard overwritten operations before
 CopyArea

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 src/sna/sna_accel.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/sna/sna_accel.c b/src/sna/sna_accel.c
index 32126b27..f1cfa089 100644
--- a/src/sna/sna_accel.c
+++ b/src/sna/sna_accel.c
@@ -4350,6 +4350,9 @@ sna_copy_boxes(DrawablePtr src, DrawablePtr dst, GCPtr gc,
 	bo = sna_drawable_use_bo(&dst_pixmap->drawable, hint,
 				 &region->extents, &damage);
 	if (bo) {
+		if (replaces)
+			kgem_bo_undo(&sna->kgem, bo);
+
 		if (src_priv && src_priv->clear) {
 			DBG(("%s: applying src clear[%08x] to dst\n",
 			     __FUNCTION__, src_priv->clear_color));