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Commit aa24781b authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Merge branches 'pm-core' and 'pm-domains' 

* pm-core:
  PM / sleep: Drop unused `info' variable
  PM / Runtime: Move ignore_children flag under CONFIG_PM
  PM / Runtime: Fix error path in pm_runtime_force_resume()

* pm-domains:
  PM / Domains: Drop unnecessary wakeup code from pm_genpd_prepare()
  PM / Domains: Remove redundant pm_runtime_get|put*() in pm_genpd_prepare()
  PM / Domains: Remove ->save|restore_state() callbacks
  PM / Domains: Rename pm_genpd_runtime_suspend|resume()
  PM / Domains: Rename stop_ok to suspend_ok for the genpd governor
parents 7777c278 fba1fbf5 164a2159

drivers/base/power/domain.c

+59 −86
Original line number Diff line number Diff line
@@ -229,17 +229,6 @@ static int genpd_poweron(struct generic_pm_domain *genpd, unsigned int depth) 
	return ret;

}



static int genpd_save_dev(struct generic_pm_domain *genpd, struct device *dev)

{

	return GENPD_DEV_CALLBACK(genpd, int, save_state, dev);

}



static int genpd_restore_dev(struct generic_pm_domain *genpd,

			struct device *dev)

{

	return GENPD_DEV_CALLBACK(genpd, int, restore_state, dev);

}



static int genpd_dev_pm_qos_notifier(struct notifier_block *nb,

				     unsigned long val, void *ptr)

{
@@ -372,17 +361,63 @@ static void genpd_power_off_work_fn(struct work_struct *work) 
}



/**

 * pm_genpd_runtime_suspend - Suspend a device belonging to I/O PM domain.

 * __genpd_runtime_suspend - walk the hierarchy of ->runtime_suspend() callbacks

 * @dev: Device to handle.

 */

static int __genpd_runtime_suspend(struct device *dev)

{

	int (*cb)(struct device *__dev);



	if (dev->type && dev->type->pm)

		cb = dev->type->pm->runtime_suspend;

	else if (dev->class && dev->class->pm)

		cb = dev->class->pm->runtime_suspend;

	else if (dev->bus && dev->bus->pm)

		cb = dev->bus->pm->runtime_suspend;

	else

		cb = NULL;



	if (!cb && dev->driver && dev->driver->pm)

		cb = dev->driver->pm->runtime_suspend;



	return cb ? cb(dev) : 0;

}



/**

 * __genpd_runtime_resume - walk the hierarchy of ->runtime_resume() callbacks

 * @dev: Device to handle.

 */

static int __genpd_runtime_resume(struct device *dev)

{

	int (*cb)(struct device *__dev);



	if (dev->type && dev->type->pm)

		cb = dev->type->pm->runtime_resume;

	else if (dev->class && dev->class->pm)

		cb = dev->class->pm->runtime_resume;

	else if (dev->bus && dev->bus->pm)

		cb = dev->bus->pm->runtime_resume;

	else

		cb = NULL;



	if (!cb && dev->driver && dev->driver->pm)

		cb = dev->driver->pm->runtime_resume;



	return cb ? cb(dev) : 0;

}



/**

 * genpd_runtime_suspend - Suspend a device belonging to I/O PM domain.

 * @dev: Device to suspend.

 *

 * Carry out a runtime suspend of a device under the assumption that its

 * pm_domain field points to the domain member of an object of type

 * struct generic_pm_domain representing a PM domain consisting of I/O devices.

 */

static int pm_genpd_runtime_suspend(struct device *dev)

static int genpd_runtime_suspend(struct device *dev)

{

	struct generic_pm_domain *genpd;

	bool (*stop_ok)(struct device *__dev);

	bool (*suspend_ok)(struct device *__dev);

	struct gpd_timing_data *td = &dev_gpd_data(dev)->td;

	bool runtime_pm = pm_runtime_enabled(dev);

	ktime_t time_start;
@@ -401,21 +436,21 @@ static int pm_genpd_runtime_suspend(struct device *dev) 
	 * runtime PM is disabled. Under these circumstances, we shall skip

	 * validating/measuring the PM QoS latency.

	 */

	stop_ok = genpd->gov ? genpd->gov->stop_ok : NULL;

	if (runtime_pm && stop_ok && !stop_ok(dev))

	suspend_ok = genpd->gov ? genpd->gov->suspend_ok : NULL;

	if (runtime_pm && suspend_ok && !suspend_ok(dev))

		return -EBUSY;



	/* Measure suspend latency. */

	if (runtime_pm)

		time_start = ktime_get();



	ret = genpd_save_dev(genpd, dev);

	ret = __genpd_runtime_suspend(dev);

	if (ret)

		return ret;



	ret = genpd_stop_dev(genpd, dev);

	if (ret) {

		genpd_restore_dev(genpd, dev);

		__genpd_runtime_resume(dev);

		return ret;

	}
@@ -446,14 +481,14 @@ static int pm_genpd_runtime_suspend(struct device *dev) 
}



/**

 * pm_genpd_runtime_resume - Resume a device belonging to I/O PM domain.

 * genpd_runtime_resume - Resume a device belonging to I/O PM domain.

 * @dev: Device to resume.

 *

 * Carry out a runtime resume of a device under the assumption that its

 * pm_domain field points to the domain member of an object of type

 * struct generic_pm_domain representing a PM domain consisting of I/O devices.

 */

static int pm_genpd_runtime_resume(struct device *dev)

static int genpd_runtime_resume(struct device *dev)

{

	struct generic_pm_domain *genpd;

	struct gpd_timing_data *td = &dev_gpd_data(dev)->td;
@@ -491,7 +526,7 @@ static int pm_genpd_runtime_resume(struct device *dev) 
	if (ret)

		goto err_poweroff;



	ret = genpd_restore_dev(genpd, dev);

	ret = __genpd_runtime_resume(dev);

	if (ret)

		goto err_stop;
@@ -695,15 +730,6 @@ static int pm_genpd_prepare(struct device *dev) 
	 * at this point and a system wakeup event should be reported if it's

	 * set up to wake up the system from sleep states.

	 */

	pm_runtime_get_noresume(dev);

	if (pm_runtime_barrier(dev) && device_may_wakeup(dev))

		pm_wakeup_event(dev, 0);



	if (pm_wakeup_pending()) {

		pm_runtime_put(dev);

		return -EBUSY;

	}



	if (resume_needed(dev, genpd))

		pm_runtime_resume(dev);
@@ -716,10 +742,8 @@ static int pm_genpd_prepare(struct device *dev) 


	mutex_unlock(&genpd->lock);



	if (genpd->suspend_power_off) {

		pm_runtime_put_noidle(dev);

	if (genpd->suspend_power_off)

		return 0;

	}



	/*

	 * The PM domain must be in the GPD_STATE_ACTIVE state at this point,
@@ -741,7 +765,6 @@ static int pm_genpd_prepare(struct device *dev) 
		pm_runtime_enable(dev);

	}



	pm_runtime_put(dev);

	return ret;

}
@@ -1427,54 +1450,6 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd, 
}

EXPORT_SYMBOL_GPL(pm_genpd_remove_subdomain);



/* Default device callbacks for generic PM domains. */



/**

 * pm_genpd_default_save_state - Default "save device state" for PM domains.

 * @dev: Device to handle.

 */

static int pm_genpd_default_save_state(struct device *dev)

{

	int (*cb)(struct device *__dev);



	if (dev->type && dev->type->pm)

		cb = dev->type->pm->runtime_suspend;

	else if (dev->class && dev->class->pm)

		cb = dev->class->pm->runtime_suspend;

	else if (dev->bus && dev->bus->pm)

		cb = dev->bus->pm->runtime_suspend;

	else

		cb = NULL;



	if (!cb && dev->driver && dev->driver->pm)

		cb = dev->driver->pm->runtime_suspend;



	return cb ? cb(dev) : 0;

}



/**

 * pm_genpd_default_restore_state - Default PM domains "restore device state".

 * @dev: Device to handle.

 */

static int pm_genpd_default_restore_state(struct device *dev)

{

	int (*cb)(struct device *__dev);



	if (dev->type && dev->type->pm)

		cb = dev->type->pm->runtime_resume;

	else if (dev->class && dev->class->pm)

		cb = dev->class->pm->runtime_resume;

	else if (dev->bus && dev->bus->pm)

		cb = dev->bus->pm->runtime_resume;

	else

		cb = NULL;



	if (!cb && dev->driver && dev->driver->pm)

		cb = dev->driver->pm->runtime_resume;



	return cb ? cb(dev) : 0;

}



/**

 * pm_genpd_init - Initialize a generic I/O PM domain object.

 * @genpd: PM domain object to initialize.
@@ -1498,8 +1473,8 @@ void pm_genpd_init(struct generic_pm_domain *genpd, 
	genpd->device_count = 0;

	genpd->max_off_time_ns = -1;

	genpd->max_off_time_changed = true;

	genpd->domain.ops.runtime_suspend = pm_genpd_runtime_suspend;

	genpd->domain.ops.runtime_resume = pm_genpd_runtime_resume;

	genpd->domain.ops.runtime_suspend = genpd_runtime_suspend;

	genpd->domain.ops.runtime_resume = genpd_runtime_resume;

	genpd->domain.ops.prepare = pm_genpd_prepare;

	genpd->domain.ops.suspend = pm_genpd_suspend;

	genpd->domain.ops.suspend_late = pm_genpd_suspend_late;
@@ -1520,8 +1495,6 @@ void pm_genpd_init(struct generic_pm_domain *genpd, 
	genpd->domain.ops.restore_early = pm_genpd_resume_early;

	genpd->domain.ops.restore = pm_genpd_resume;

	genpd->domain.ops.complete = pm_genpd_complete;

	genpd->dev_ops.save_state = pm_genpd_default_save_state;

	genpd->dev_ops.restore_state = pm_genpd_default_restore_state;



	if (genpd->flags & GENPD_FLAG_PM_CLK) {

		genpd->dev_ops.stop = pm_clk_suspend;

drivers/base/power/domain_governor.c

+10 −10
Original line number Diff line number Diff line
@@ -37,10 +37,10 @@ static int dev_update_qos_constraint(struct device *dev, void *data) 
}



/**

 * default_stop_ok - Default PM domain governor routine for stopping devices.

 * default_suspend_ok - Default PM domain governor routine to suspend devices.

 * @dev: Device to check.

 */

static bool default_stop_ok(struct device *dev)

static bool default_suspend_ok(struct device *dev)

{

	struct gpd_timing_data *td = &dev_gpd_data(dev)->td;

	unsigned long flags;
@@ -51,13 +51,13 @@ static bool default_stop_ok(struct device *dev) 
	spin_lock_irqsave(&dev->power.lock, flags);



	if (!td->constraint_changed) {

		bool ret = td->cached_stop_ok;

		bool ret = td->cached_suspend_ok;



		spin_unlock_irqrestore(&dev->power.lock, flags);

		return ret;

	}

	td->constraint_changed = false;

	td->cached_stop_ok = false;

	td->cached_suspend_ok = false;

	td->effective_constraint_ns = -1;

	constraint_ns = __dev_pm_qos_read_value(dev);
@@ -83,13 +83,13 @@ static bool default_stop_ok(struct device *dev) 
			return false;

	}

	td->effective_constraint_ns = constraint_ns;

	td->cached_stop_ok = constraint_ns >= 0;

	td->cached_suspend_ok = constraint_ns >= 0;



	/*

	 * The children have been suspended already, so we don't need to take

	 * their stop latencies into account here.

	 * their suspend latencies into account here.

	 */

	return td->cached_stop_ok;

	return td->cached_suspend_ok;

}



/**
@@ -150,7 +150,7 @@ static bool __default_power_down_ok(struct dev_pm_domain *pd, 
		 */

		td = &to_gpd_data(pdd)->td;

		constraint_ns = td->effective_constraint_ns;

		/* default_stop_ok() need not be called before us. */

		/* default_suspend_ok() need not be called before us. */

		if (constraint_ns < 0) {

			constraint_ns = dev_pm_qos_read_value(pdd->dev);

			constraint_ns *= NSEC_PER_USEC;
@@ -227,7 +227,7 @@ static bool always_on_power_down_ok(struct dev_pm_domain *domain) 
}



struct dev_power_governor simple_qos_governor = {

	.stop_ok = default_stop_ok,

	.suspend_ok = default_suspend_ok,

	.power_down_ok = default_power_down_ok,

};
@@ -236,5 +236,5 @@ struct dev_power_governor simple_qos_governor = { 
 */

struct dev_power_governor pm_domain_always_on_gov = {

	.power_down_ok = always_on_power_down_ok,

	.stop_ok = default_stop_ok,

	.suspend_ok = default_suspend_ok,

};

drivers/base/power/main.c

+5 −13
Original line number Diff line number Diff line
@@ -1556,7 +1556,6 @@ int dpm_suspend(pm_message_t state) 
static int device_prepare(struct device *dev, pm_message_t state)

{

	int (*callback)(struct device *) = NULL;

	char *info = NULL;

	int ret = 0;



	if (dev->power.syscore)
@@ -1579,24 +1578,17 @@ static int device_prepare(struct device *dev, pm_message_t state) 
		goto unlock;

	}



	if (dev->pm_domain) {

		info = "preparing power domain ";

	if (dev->pm_domain)

		callback = dev->pm_domain->ops.prepare;

	} else if (dev->type && dev->type->pm) {

		info = "preparing type ";

	else if (dev->type && dev->type->pm)

		callback = dev->type->pm->prepare;

	} else if (dev->class && dev->class->pm) {

		info = "preparing class ";

	else if (dev->class && dev->class->pm)

		callback = dev->class->pm->prepare;

	} else if (dev->bus && dev->bus->pm) {

		info = "preparing bus ";

	else if (dev->bus && dev->bus->pm)

		callback = dev->bus->pm->prepare;

	}



	if (!callback && dev->driver && dev->driver->pm) {

		info = "preparing driver ";

	if (!callback && dev->driver && dev->driver->pm)

		callback = dev->driver->pm->prepare;

	}



	if (callback)

		ret = callback(dev);

drivers/base/power/runtime.c

+7 −2
Original line number Diff line number Diff line
@@ -1506,11 +1506,16 @@ int pm_runtime_force_resume(struct device *dev) 
		goto out;

	}



	ret = callback(dev);

	ret = pm_runtime_set_active(dev);

	if (ret)

		goto out;



	pm_runtime_set_active(dev);

	ret = callback(dev);

	if (ret) {

		pm_runtime_set_suspended(dev);

		goto out;

	}



	pm_runtime_mark_last_busy(dev);

out:

	pm_runtime_enable(dev);

drivers/mmc/host/toshsd.c

+1 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/pm.h>

#include <linux/pm_runtime.h>

#include <linux/mmc/host.h>

#include <linux/mmc/mmc.h>