drm/i915: use drm_modeset_lock_all

[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_dp.c

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 1b63d55318a0b466cdd45f6fcfb9af9259473557..6912d29f46f3c03c1f7bb61cba413ceae44b28c1 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1057,6 +1057,8 @@ static void ironlake_panel_vdd_off_sync(struct intel_dp *intel_dp)
        struct drm_i915_private *dev_priv = dev->dev_private;
        u32 pp;
 
+       WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
+
        if (!intel_dp->want_panel_vdd && ironlake_edp_have_panel_vdd(intel_dp)) {
                pp = ironlake_get_pp_control(dev_priv);
                pp &= ~EDP_FORCE_VDD;