[PATCH 2/3] drm/i915/guc : GEM_BUG_ON on invoking GuC reset function

Sagar Arun Kamble sagar.a.kamble at intel.com
Wed Jan 3 06:39:22 UTC 2018

From: Sujaritha Sundaresan <sujaritha.sundaresan at intel.com>

Instead of returning -EINVAL, GEM_BUG_ON when GuC reset is invoked for
platforms not supporting as we don't expect to invoke it.

v2: re-wording commit message and subject (Sagar)

Signed-off-by: Sujaritha Sundaresan <sujaritha.sundaresan at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
Cc: Sagar Arun Kamble <sagar.a.kamble at intel.com>
Reviewed-by: Sagar Arun Kamble <sagar.a.kamble at intel.com>
 drivers/gpu/drm/i915/intel_uncore.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 89547b61..94e1fb3 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -1936,8 +1936,7 @@ int intel_reset_guc(struct drm_i915_private *dev_priv)
 	int ret;
-	if (!HAS_GUC(dev_priv))
-		return -EINVAL;
+	GEM_BUG_ON(!HAS_GUC(dev_priv));
 	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
 	ret = gen6_hw_domain_reset(dev_priv, GEN9_GRDOM_GUC);

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