forked from mirrors/linux
PM / Runtime: Remove device fields related to suspend time, v2
After the previous changes in default_stop_ok() and default_power_down_ok() for PM domains, there are two fields in struct dev_pm_info that aren't necessary any more, suspend_time and max_time_suspended_ns. Remove those fields along with all of the code that accesses them, which simplifies the runtime PM framework quite a bit. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Rafael J. Wysocki
parent
dd8683e97f
commit
76e267d822
4 changed files with 2 additions and 119 deletions
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@ -445,16 +445,6 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
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genpd->status = GPD_STATE_POWER_OFF;
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/* Update PM QoS information for devices in the domain. */
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list_for_each_entry_reverse(pdd, &genpd->dev_list, list_node) {
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struct gpd_timing_data *td = &to_gpd_data(pdd)->td;
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pm_runtime_update_max_time_suspended(pdd->dev,
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td->start_latency_ns +
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td->restore_state_latency_ns +
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genpd->power_on_latency_ns);
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}
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list_for_each_entry(link, &genpd->slave_links, slave_node) {
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genpd_sd_counter_dec(link->master);
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genpd_queue_power_off_work(link->master);
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@ -515,9 +505,6 @@ static int pm_genpd_runtime_suspend(struct device *dev)
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if (ret)
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return ret;
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pm_runtime_update_max_time_suspended(dev,
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dev_gpd_data(dev)->td.start_latency_ns);
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/*
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* If power.irq_safe is set, this routine will be run with interrupts
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* off, so it can't use mutexes.
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@ -282,47 +282,6 @@ static int rpm_callback(int (*cb)(struct device *), struct device *dev)
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return retval != -EACCES ? retval : -EIO;
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}
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struct rpm_qos_data {
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ktime_t time_now;
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s64 constraint_ns;
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};
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/**
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* rpm_update_qos_constraint - Update a given PM QoS constraint data.
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* @dev: Device whose timing data to use.
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* @data: PM QoS constraint data to update.
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*
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* Use the suspend timing data of @dev to update PM QoS constraint data pointed
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* to by @data.
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*/
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static int rpm_update_qos_constraint(struct device *dev, void *data)
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{
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struct rpm_qos_data *qos = data;
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unsigned long flags;
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s64 delta_ns;
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int ret = 0;
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spin_lock_irqsave(&dev->power.lock, flags);
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if (dev->power.max_time_suspended_ns < 0)
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goto out;
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delta_ns = dev->power.max_time_suspended_ns -
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ktime_to_ns(ktime_sub(qos->time_now, dev->power.suspend_time));
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if (delta_ns <= 0) {
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ret = -EBUSY;
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goto out;
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}
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if (qos->constraint_ns > delta_ns || qos->constraint_ns == 0)
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qos->constraint_ns = delta_ns;
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out:
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spin_unlock_irqrestore(&dev->power.lock, flags);
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return ret;
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}
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/**
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* rpm_suspend - Carry out runtime suspend of given device.
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* @dev: Device to suspend.
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@ -349,7 +308,6 @@ static int rpm_suspend(struct device *dev, int rpmflags)
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{
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int (*callback)(struct device *);
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struct device *parent = NULL;
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struct rpm_qos_data qos;
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int retval;
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trace_rpm_suspend(dev, rpmflags);
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@ -445,38 +403,14 @@ static int rpm_suspend(struct device *dev, int rpmflags)
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goto out;
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}
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qos.constraint_ns = __dev_pm_qos_read_value(dev);
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if (qos.constraint_ns < 0) {
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/* Negative constraint means "never suspend". */
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if (__dev_pm_qos_read_value(dev) < 0) {
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/* Negative PM QoS constraint means "never suspend". */
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retval = -EPERM;
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goto out;
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}
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qos.constraint_ns *= NSEC_PER_USEC;
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qos.time_now = ktime_get();
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__update_runtime_status(dev, RPM_SUSPENDING);
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if (!dev->power.ignore_children) {
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if (dev->power.irq_safe)
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spin_unlock(&dev->power.lock);
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else
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spin_unlock_irq(&dev->power.lock);
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retval = device_for_each_child(dev, &qos,
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rpm_update_qos_constraint);
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if (dev->power.irq_safe)
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spin_lock(&dev->power.lock);
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else
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spin_lock_irq(&dev->power.lock);
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if (retval)
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goto fail;
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}
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dev->power.suspend_time = qos.time_now;
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dev->power.max_time_suspended_ns = qos.constraint_ns ? : -1;
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if (dev->pm_domain)
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callback = dev->pm_domain->ops.runtime_suspend;
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else if (dev->type && dev->type->pm)
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@ -529,8 +463,6 @@ static int rpm_suspend(struct device *dev, int rpmflags)
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fail:
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__update_runtime_status(dev, RPM_ACTIVE);
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dev->power.suspend_time = ktime_set(0, 0);
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dev->power.max_time_suspended_ns = -1;
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dev->power.deferred_resume = false;
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wake_up_all(&dev->power.wait_queue);
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@ -704,9 +636,6 @@ static int rpm_resume(struct device *dev, int rpmflags)
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if (dev->power.no_callbacks)
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goto no_callback; /* Assume success. */
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dev->power.suspend_time = ktime_set(0, 0);
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dev->power.max_time_suspended_ns = -1;
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__update_runtime_status(dev, RPM_RESUMING);
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if (dev->pm_domain)
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@ -1369,9 +1298,6 @@ void pm_runtime_init(struct device *dev)
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setup_timer(&dev->power.suspend_timer, pm_suspend_timer_fn,
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(unsigned long)dev);
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dev->power.suspend_time = ktime_set(0, 0);
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dev->power.max_time_suspended_ns = -1;
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init_waitqueue_head(&dev->power.wait_queue);
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}
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@ -1389,28 +1315,3 @@ void pm_runtime_remove(struct device *dev)
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if (dev->power.irq_safe && dev->parent)
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pm_runtime_put_sync(dev->parent);
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}
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/**
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* pm_runtime_update_max_time_suspended - Update device's suspend time data.
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* @dev: Device to handle.
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* @delta_ns: Value to subtract from the device's max_time_suspended_ns field.
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*
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* Update the device's power.max_time_suspended_ns field by subtracting
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* @delta_ns from it. The resulting value of power.max_time_suspended_ns is
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* never negative.
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*/
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void pm_runtime_update_max_time_suspended(struct device *dev, s64 delta_ns)
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{
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unsigned long flags;
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spin_lock_irqsave(&dev->power.lock, flags);
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if (delta_ns > 0 && dev->power.max_time_suspended_ns > 0) {
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if (dev->power.max_time_suspended_ns > delta_ns)
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dev->power.max_time_suspended_ns -= delta_ns;
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else
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dev->power.max_time_suspended_ns = 0;
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}
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spin_unlock_irqrestore(&dev->power.lock, flags);
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}
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@ -544,8 +544,6 @@ struct dev_pm_info {
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unsigned long active_jiffies;
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unsigned long suspended_jiffies;
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unsigned long accounting_timestamp;
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ktime_t suspend_time;
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s64 max_time_suspended_ns;
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struct dev_pm_qos_request *pq_req;
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#endif
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struct pm_subsys_data *subsys_data; /* Owned by the subsystem. */
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@ -150,9 +150,6 @@ static inline void pm_runtime_set_autosuspend_delay(struct device *dev,
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static inline unsigned long pm_runtime_autosuspend_expiration(
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struct device *dev) { return 0; }
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static inline void pm_runtime_update_max_time_suspended(struct device *dev,
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s64 delta_ns) {}
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#endif /* !CONFIG_PM_RUNTIME */
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static inline int pm_runtime_idle(struct device *dev)
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