[Intel-gfx] [PATCH 7/9] drm/i915: Hold pc8 lock around toggling pc8.gpu_idle

[Rodrigo Vivi]

From: Chris Wilson <ch...@chris-wilson.co.uk>

We need to hold the pc8 lock around toggling the value of gpu_idle.

Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zan...@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zan...@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.v...@gmail.com>
---
 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 be810c5..cfcad82 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6540,18 +6540,22 @@ 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);
 }
 
 #define for_each_power_domain(domain, mask)                            \
-- 
1.8.3.1

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx