[Intel-gfx] [CI] drm/i915/gt: Free request pool from virtual engines

[Chris Wilson]

While extremely unlikely to be populated, we could capture a request on
the virtual engine which we should free along with the virtual engine.

Fixes: 43acd6516ca9 ("drm/i915: Keep a per-engine request pool")
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/intel_engine.h    |  2 ++
 drivers/gpu/drm/i915/gt/intel_engine_cs.c | 13 +++++++++----
 drivers/gpu/drm/i915/gt/intel_lrc.c       |  2 ++
 3 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine.h b/drivers/gpu/drm/i915/gt/intel_engine.h
index b469de0dd9b6..d9ee64e2ef79 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine.h
+++ b/drivers/gpu/drm/i915/gt/intel_engine.h
@@ -199,6 +199,8 @@ void intel_engine_cleanup(struct intel_engine_cs *engine);
 int intel_engines_init_mmio(struct intel_gt *gt);
 int intel_engines_init(struct intel_gt *gt);
 
+void intel_engine_free_request_pool(struct intel_engine_cs *engine);
+
 void intel_engines_release(struct intel_gt *gt);
 void intel_engines_free(struct intel_gt *gt);
 
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index 5f45c8274203..977e23fac5ce 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -426,6 +426,14 @@ void intel_engines_release(struct intel_gt *gt)
 	}
 }
 
+void intel_engine_free_request_pool(struct intel_engine_cs *engine)
+{
+	if (!engine->request_pool)
+		return;
+
+	kmem_cache_free(i915_request_slab_cache(), engine->request_pool);
+}
+
 void intel_engines_free(struct intel_gt *gt)
 {
 	struct intel_engine_cs *engine;
@@ -435,10 +443,7 @@ void intel_engines_free(struct intel_gt *gt)
 	rcu_barrier();
 
 	for_each_engine(engine, gt, id) {
-		if (engine->request_pool)
-			kmem_cache_free(i915_request_slab_cache(),
-					engine->request_pool);
-
+		intel_engine_free_request_pool(engine);
 		kfree(engine);
 		gt->engine[id] = NULL;
 	}
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index f028114714cd..19ffc7763683 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -4931,6 +4931,8 @@ static void virtual_context_destroy(struct kref *kref)
 		__execlists_context_fini(&ve->context);
 	intel_context_fini(&ve->context);
 
+	intel_engine_free_request_pool(&ve->base);
+
 	kfree(ve->bonds);
 	kfree(ve);
 }
-- 
2.20.1