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Before suspending, we wait upon the outstanding GPU requests and flush our pending idle handlers. This should downclock the GPU to its lowest power state. Add a WARN to check that the delayed tasks were run and did their job properly. Suggested-by: Akash Goel <akash.goel@intel.com> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>