[Intel-gfx] [PATCH 3/3] drm/i915/gem: Peek at the inflight context

[Chris Wilson]

If supported by the backend, we can quickly look at the context's
inflight engine rather than search along the active list to confirm.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gem/i915_gem_context.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index c7363036765a..e53a9d40f28b 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -426,6 +426,10 @@ static struct intel_engine_cs *active_engine(struct intel_context *ce)
 	if (!ce->timeline)
 		return NULL;
 
+	engine = intel_context_inflight(ce);
+	if (engine)
+		return engine;
+
 	/*
 	 * rq->link is only SLAB_TYPESAFE_BY_RCU, we need to hold a reference
 	 * to the request to prevent it being transferred to a new timeline
-- 
2.20.1