We need to hold the pc8 lock around toggling the value of gpu_idle.
Signed-off-by: Chris Wilson <[email protected]>
Cc: Paulo Zanoni <[email protected]>
---
drivers/gpu/drm/i915/intel_display.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 5ce1558..4fa1fd5 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6546,18 +6546,22 @@ done:
static void hsw_package_c8_gpu_idle(struct drm_i915_private *dev_priv)
{
+ mutex_lock(&dev_priv->pc8.lock);
if (!dev_priv->pc8.gpu_idle) {
dev_priv->pc8.gpu_idle = true;
- hsw_enable_package_c8(dev_priv);
+ __hsw_enable_package_c8(dev_priv);
}
+ mutex_unlock(&dev_priv->pc8.lock);
}
static void hsw_package_c8_gpu_busy(struct drm_i915_private *dev_priv)
{
+ mutex_lock(&dev_priv->pc8.lock);
if (dev_priv->pc8.gpu_idle) {
dev_priv->pc8.gpu_idle = false;
- hsw_disable_package_c8(dev_priv);
+ __hsw_disable_package_c8(dev_priv);
}
+ mutex_unlock(&dev_priv->pc8.lock);
}
static void haswell_modeset_global_resources(struct drm_device *dev)
--
1.7.9.5
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