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| /openbmc/linux/drivers/gpu/drm/ |
| H A D | drm_probe_helper.c | diff 1fe7841d892925aff10c3b070937e974d7835d2b Tue Dec 06 05:37:15 CST 2016 Chris Wilson <chris@chris-wilson.co.uk> drm: Don't block the kworker waiting for mode_config.mutex in output_poll()
If we cannot acquire the mode_config.mutex immediately, just back off and
queue a new attempt after the poll interval. This is mostly to stop the
hung task spam when the system is deadlocked, but it will also lessen
the load (in such extreme cases).
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
[danvet:s/lock/mutex/ per Eric's comment.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161206113715.30382-1-chris@chris-wilson.co.uk
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