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Commit 7c063c72 authored by Jesse Barnes's avatar Jesse Barnes Committed by Daniel Vetter
Browse files

drm/i915: take mode config lock around crtc disable at suspend 

This is just a theoretical issue, but we need to do this to prevent the
WARN in pipe_from_connector at suspend time.

This regression has been introduce in

commit 7bd688cd
Author: Jani Nikula <jani.nikula@intel.com>
Date:   Fri Nov 8 16:48:56 2013 +0200

    drm/i915: handle backlight through chip specific functions

https://bugs.freedesktop.org/show_bug.cgi?id=71978


Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent c51e9701

drivers/gpu/drm/i915/i915_drv.c

+2 −0
Original line number Diff line number Diff line
@@ -534,8 +534,10 @@ static int i915_drm_freeze(struct drm_device *dev) 
		 * Disable CRTCs directly since we want to preserve sw state

		 * for _thaw.

		 */

		mutex_lock(&dev->mode_config.mutex);

		list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)

			dev_priv->display.crtc_disable(crtc);

		mutex_unlock(&dev->mode_config.mutex);



		intel_modeset_suspend_hw(dev);

	}