[PATCH 06/15] drm/i915: Assert no external observers when unwind a failed request alloc

[Chris Wilson]

Before we return the request back to the kmem_cache after a failed
i915_gem_request_alloc(), we should assert that it has not been added to
any global state tracking.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem_request.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c
index a46e16a4fd64..3fabe4cf14c1 100644
--- a/drivers/gpu/drm/i915/i915_gem_request.c
+++ b/drivers/gpu/drm/i915/i915_gem_request.c
@@ -599,6 +599,9 @@ i915_gem_request_alloc(struct intel_engine_cs *engine,
 	return req;
 
 err_ctx:
+	GEM_BUG_ON(!list_empty(&req->active_list));
+	GEM_BUG_ON(!list_empty(&req->priotree.signalers_list));
+	GEM_BUG_ON(!list_empty(&req->priotree.waiters_list));
 	i915_gem_context_put(ctx);
 	kmem_cache_free(dev_priv->requests, req);
 err_unreserve:
-- 
2.10.2