[Intel-gfx] [PATCH] drm/i915: Squelch overzealous uncore reset WARN_ON

[Mika Kuoppala]

We added this WARN_ON to guard against using uninitialized
forcewake domains. But forgot blissfully that not all
gens have forcewake domains in the first place.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88911
Tested-by: Ding Heng <hengx.ding at intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>
---
 drivers/gpu/drm/i915/intel_uncore.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 76b60a3..bbee962 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -166,6 +166,9 @@ fw_domains_reset(struct drm_i915_private *dev_priv, enum forcewake_domains fw_do
 	struct intel_uncore_forcewake_domain *d;
 	enum forcewake_domain_id id;
 
+	if (INTEL_INFO(dev_priv->dev)->gen <= 5)
+		return;
+
 	WARN_ON(dev_priv->uncore.fw_domains == 0);
 
 	for_each_fw_domain_mask(d, fw_domains, dev_priv, id)
-- 
1.9.1