[igt-dev] [PATCH i-g-t] Force spin-batch to cause a hang as required

[Chris Wilson]

When using a spinner to trigger a hang, make it unpreemptable so that it
appears like a true hang.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 tests/i915/gem_exec_fence.c | 3 ++-
 tests/kms_busy.c            | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/tests/i915/gem_exec_fence.c b/tests/i915/gem_exec_fence.c
index 0befb54f8..f5bdf5851 100644
--- a/tests/i915/gem_exec_fence.c
+++ b/tests/i915/gem_exec_fence.c
@@ -331,7 +331,8 @@ static void test_fence_await(int fd, unsigned ring, unsigned flags)
 
 	spin = igt_spin_new(fd,
 			    .engine = ring,
-			    .flags = IGT_SPIN_FENCE_OUT);
+			    .flags = (IGT_SPIN_FENCE_OUT |
+				      IGT_SPIN_NO_PREEMPTION));
 	igt_assert(spin->out_fence != -1);
 
 	i = 0;
diff --git a/tests/kms_busy.c b/tests/kms_busy.c
index 66f26cd08..7e5ab3d19 100644
--- a/tests/kms_busy.c
+++ b/tests/kms_busy.c
@@ -271,7 +271,8 @@ static void test_pageflip_modeset_hang(igt_display_t *dpy,
 
 	t = igt_spin_new(dpy->drm_fd,
 			 .engine = ring,
-			 .dependency = fb.gem_handle);
+			 .dependency = fb.gem_handle,
+			 .flags = IGT_SPIN_NO_PREEMPTION);
 
 	do_or_die(drmModePageFlip(dpy->drm_fd, dpy->pipes[pipe].crtc_id, fb.fb_id, DRM_MODE_PAGE_FLIP_EVENT, &fb));
 
-- 
2.22.0