1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/selftests/mock_engine.c b/drivers/gpu/drm/i915/selftests/mock_engine.c
index c2a0451336cf..22a73da45ad5 100644
--- a/drivers/gpu/drm/i915/selftests/mock_engine.c
+++ b/drivers/gpu/drm/i915/selftests/mock_engine.c
@@ -200,6 +200,8 @@ struct intel_engine_cs *mock_engine(struct drm_i915_private *i915,
         engine->base.submit_request = mock_submit_request;
 
         i915_timeline_init(i915, &engine->base.timeline, engine->base.name);
+        lockdep_set_subclass(&engine->base.timeline.lock, TIMELINE_ENGINE);
+
         intel_engine_init_breadcrumbs(&engine->base);
         engine->base.breadcrumbs.mock = true; /* prevent touching HW for irqs */