Acquiring the forcewake domain asserts that it is in an atomic section
(as we always expect to under the uncore.lock). This true expect for
initialising the domains on Ivybridge, and so we generate a warning.
Wrap the manual usage of fw_domains inside the spin_lock.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Cc: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_uncore.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 7da3906badf3..1d65209c0998 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -1299,9 +1299,11 @@ static void intel_uncore_fw_domains_init(struct drm_i915_private *dev_priv)
fw_domain_init(dev_priv, FW_DOMAIN_ID_RENDER,
FORCEWAKE_MT, FORCEWAKE_MT_ACK);
+ spin_lock_irq(&dev_priv->uncore.lock);
fw_domains_get_with_thread_status(dev_priv, FORCEWAKE_ALL);
ecobus = __raw_i915_read32(dev_priv, ECOBUS);
fw_domains_put_with_fifo(dev_priv, FORCEWAKE_ALL);
+ spin_unlock_irq(&dev_priv->uncore.lock);
if (!(ecobus & FORCEWAKE_MT_ENABLE)) {
DRM_INFO("No MT forcewake available on Ivybridge, this can result in issues\n");
--
2.8.1
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