diff mbox series

[CI,1/3] drm/i915/selftests: Serialise nop reset with retirement

Message ID 20190626134433.6318-1-chris@chris-wilson.co.uk (mailing list archive)
State New, archived
Headers show
Series [CI,1/3] drm/i915/selftests: Serialise nop reset with retirement | expand

Commit Message

Chris Wilson June 26, 2019, 1:44 p.m. UTC 
In order for the reset count to be accurate across our selftest, we need
to prevent the background retire worker from modifying our expected
state. To preserve the intent of symmetry, we apply this to both
i915_reset and i915_reset_engine, even though it strictly only affects
i915_reset_engine currently.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
---
 drivers/gpu/drm/i915/gt/selftest_hangcheck.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
index 3ceb397c8645..0e0b6c572ae9 100644
--- a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
+++ b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
@@ -398,6 +398,7 @@  static int igt_reset_nop(void *arg)
 	count = 0;
 	do {
 		mutex_lock(&i915->drm.struct_mutex);
+
 		for_each_engine(engine, i915, id) {
 			int i;
 
@@ -413,11 +414,12 @@  static int igt_reset_nop(void *arg)
 				i915_request_add(rq);
 			}
 		}
-		mutex_unlock(&i915->drm.struct_mutex);
 
 		igt_global_reset_lock(i915);
 		i915_reset(i915, ALL_ENGINES, NULL);
 		igt_global_reset_unlock(i915);
+
+		mutex_unlock(&i915->drm.struct_mutex);
 		if (i915_reset_failed(i915)) {
 			err = -EIO;
 			break;
@@ -511,9 +513,8 @@  static int igt_reset_nop_engine(void *arg)
 
 				i915_request_add(rq);
 			}
-			mutex_unlock(&i915->drm.struct_mutex);
-
 			err = i915_reset_engine(engine, NULL);
+			mutex_unlock(&i915->drm.struct_mutex);
 			if (err) {
 				pr_err("i915_reset_engine failed\n");
 				break;