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drm/i915: avoid struct mutex output_poll mutex lock loop on unload 

Cancel the output polling work proc before acquiring the struct mutex
to avoid acquiring the work proc mutex with the struct mutex
held. This avoids inverting the lock order seen when the work proc
runs.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Keith Packard 2010-10-03 19:36:26 -07:00 committed by Chris Wilson
parent 58e10eb92d
commit f87ea76131
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/intel_display.c
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@ -6127,9 +6127,9 @@ void intel_modeset_cleanup(struct drm_device *dev)
struct drm_crtc *crtc;
struct intel_crtc *intel_crtc;
drm_kms_helper_poll_fini(dev);
mutex_lock(&dev->struct_mutex);
drm_kms_helper_poll_fini(dev);
intel_fbdev_fini(dev);
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {