[PATCH] drm/i915: Take modeset locks around intel_modeset_setup_hw_state()

[ville.syrj...@linux.intel.com]

From: Ville Syrj?l? <ville.syrj...@linux.intel.com>

Some lower level things get angry if we don't have modeset locks
during intel_modeset_setup_hw_state(). Actually the resume and
lid_notify codepaths alreday hold the locks, but the init codepath
doesn't, so fix that.

Signed-off-by: Ville Syrj?l? <ville.syrjala at linux.intel.com>
---
Totally untested, but looks correct to me.

 drivers/gpu/drm/i915/intel_display.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index 080f6fd..114db51 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11046,7 +11046,9 @@ void intel_modeset_gem_init(struct drm_device *dev)

        intel_setup_overlay(dev);

+       drm_modeset_lock_all(dev);
        intel_modeset_setup_hw_state(dev, false);
+       drm_modeset_unlock_all(dev);
 }

 void intel_modeset_cleanup(struct drm_device *dev)
-- 
1.8.3.2