Commit 6961795f authored by Ulf Hansson's avatar Ulf Hansson Committed by Rafael J. Wysocki
Browse files

PM: domains: Measure power-on/off latencies in genpd based on a governor 



The measurements of the power-on|off latencies in genpd for a PM domain 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: default avatarUlf Hansson <ulf.hansson@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent f38d1a6d

drivers/base/power/domain.c

+4 −4
Original line number Diff line number Diff line
@@ -509,6 +509,7 @@ static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed) 
	if (!genpd->power_on)

		goto out;



	timed = timed && genpd->gd;

	if (!timed) {

		ret = genpd->power_on(genpd);

		if (ret)
@@ -527,7 +528,6 @@ static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed) 
		goto out;



	genpd->states[state_idx].power_on_latency_ns = elapsed_ns;

	if (genpd->gd)

	genpd->gd->max_off_time_changed = true;

	pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n",

		 genpd->name, "on", elapsed_ns);
@@ -559,6 +559,7 @@ static int _genpd_power_off(struct generic_pm_domain *genpd, bool timed) 
	if (!genpd->power_off)

		goto out;



	timed = timed && genpd->gd;

	if (!timed) {

		ret = genpd->power_off(genpd);

		if (ret)
@@ -577,7 +578,6 @@ static int _genpd_power_off(struct generic_pm_domain *genpd, bool timed) 
		goto out;



	genpd->states[state_idx].power_off_latency_ns = elapsed_ns;

	if (genpd->gd)

	genpd->gd->max_off_time_changed = true;

	pr_debug("%s: Power-%s latency exceeded, new value %lld ns\n",

		 genpd->name, "off", elapsed_ns);