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The QoS latency measurements for devices in genpd_runtime_suspend|resume() are superfluous, unless the corresponding genpd has a governor assigned to it, which would make use of the data. Therefore, let's improve the behaviour in genpd by making the measurements conditional, based upon if there's a governor assigned. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>