From 3d5d41fa9823cf44138c8f4bc954bca80539d74e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <michel@tungstengraphics.com>
Date: Fri, 15 Jun 2007 17:13:11 +0200
Subject: i915: Fix handling of breadcrumb counter wraparounds.

---
 linux-core/i915_fence.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'linux-core/i915_fence.c')

diff --git a/linux-core/i915_fence.c b/linux-core/i915_fence.c
index 88daa57c..00873485 100644
--- a/linux-core/i915_fence.c
+++ b/linux-core/i915_fence.c
@@ -61,7 +61,7 @@ static void i915_perform_flush(drm_device_t * dev)
 		 * First update fences with the current breadcrumb.
 		 */
 
-		diff = sequence - fc->last_exe_flush;
+		diff = (sequence - fc->last_exe_flush) & BREADCRUMB_MASK;
 		if (diff < driver->wrap_diff && diff != 0) {
 			drm_fence_handler(dev, 0, sequence, DRM_FENCE_TYPE_EXE);
 		}
-- 
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