[Intel-gfx] [PATCH] drm/i915: Use BUILD_BUG_ON to detected missing engine definitions

[Michal Wajdeczko]

Additionally use runtime check to catch invalid engine indices.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Jani Nikula <jani.nikula at intel.com>
---
 drivers/gpu/drm/i915/intel_engine_cs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c
index a238304..8df53ae 100644
--- a/drivers/gpu/drm/i915/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/intel_engine_cs.c
@@ -89,6 +89,8 @@ intel_engine_setup(struct drm_i915_private *dev_priv,
 	const struct engine_info *info = &intel_engines[id];
 	struct intel_engine_cs *engine;
 
+	BUILD_BUG_ON(ARRAY_SIZE(intel_engines) != I915_NUM_ENGINES);
+	GEM_BUG_ON(id < 0 || id >= I915_NUM_ENGINES);
 	GEM_BUG_ON(dev_priv->engine[id]);
 	engine = kzalloc(sizeof(*engine), GFP_KERNEL);
 	if (!engine)
-- 
2.7.4