test/present: Look for MSC wraparound

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2015-02-12 17:05:52 +00:00 · 2015-02-12 17:05:52 +00:00 · 9eb0ab15b1
parent 254f2f2f4b
commit 9eb0ab15b1
1 changed files with 1 additions and 1 deletions
--- a/test/present-test.c
+++ b/test/present-test.c
@ -165,7 +165,7 @@ static uint64_t check_msc(Display *dpy, Window win, void *q, uint64_t last_msc,
 		free(ev);
 	} while (!complete);

-	if (msc < last_msc) {
+	if ((int64_t)(msc - last_msc) < 0) {
 		printf("Invalid MSC: was %llu, now %llu\n",
 		       (long long)last_msc, (long long)msc);
 	}