lib/drmtest: skip when prefault control isn't available

Instead of crashing with an igt_assert. Fixes the only crashing test
when running igt on non-intel systems.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/lib/drmtest.c b/lib/drmtest.c
index ee74aa0..f1ee13c 100644 (file)
--- a/lib/drmtest.c
+++ b/lib/drmtest.c
@@ -2040,7 +2040,7 @@ static void igt_prefault_control(bool enable)
        else
                index = 0;
 
-       igt_assert(write(fd, &buf[index], 1) == 1);
+       igt_require(write(fd, &buf[index], 1) == 1);
 
        close(fd);
 }
@@ -2059,7 +2059,7 @@ void igt_disable_prefault(void)
 
 void igt_enable_prefault(void)
 {
-       return igt_prefault_control(true);
+       igt_prefault_control(true);
 }
 
 void igt_system_suspend_autoresume(void)