From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Wed, 8 Jul 2015 20:45:51 +0000 (+0300)
Subject: drm/i915: Add locking around chv_phy_control_init()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=770effb19fbdcb44c6bdacf4a78571d28393f48f;p=linux-beck.git

drm/i915: Add locking around chv_phy_control_init()

dev_priv->chv_phy_control is protected by the power_domains->lock
elsewhere, so also grab it when initializing chv_phy_control.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Deepak S <deepak.s@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 821644d1b544..974c4cbf3fdb 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -1685,7 +1685,9 @@ void intel_power_domains_init_hw(struct drm_i915_private *dev_priv)
 	power_domains->initializing = true;
 
 	if (IS_CHERRYVIEW(dev)) {
+		mutex_lock(&power_domains->lock);
 		chv_phy_control_init(dev_priv);
+		mutex_unlock(&power_domains->lock);
 	} else if (IS_VALLEYVIEW(dev)) {
 		mutex_lock(&power_domains->lock);
 		vlv_cmnlane_wa(dev_priv);