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PM-runtime: Call pm_runtime_active|suspended_time() from sysfs

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Avoid the open-coding of the accounted time acquisition in
runtime_active|suspend_time_show() and make them call
pm_runtime_active|suspended_time() instead.

Note that this change also indirectly avoids holding dev->power.lock
around the do_div() computation and the sprintf() call which is an
additional improvement.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ulf Hansson 2019-03-05 13:55:35 +01:00 committed by Rafael J. Wysocki
parent fdc56c0732
commit 0996584b30
3 changed files with 3 additions and 12 deletions
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2
drivers/base/power/runtime.c
View File

@ -64,7 +64,7 @@ static int rpm_suspend(struct device *dev, int rpmflags);
* runtime_status field is updated, to account the time in the old state
* correctly.
*/
void update_pm_runtime_accounting(struct device *dev)
static void update_pm_runtime_accounting(struct device *dev)
{
u64 now, last, delta;

12
drivers/base/power/sysfs.c
View File

@ -125,13 +125,9 @@ static ssize_t runtime_active_time_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
u64 tmp;
spin_lock_irq(&dev->power.lock);
update_pm_runtime_accounting(dev);
tmp = dev->power.active_time;
u64 tmp = pm_runtime_active_time(dev);
do_div(tmp, NSEC_PER_MSEC);
ret = sprintf(buf, "%llu\n", tmp);
spin_unlock_irq(&dev->power.lock);
return ret;
}
@ -141,13 +137,9 @@ static ssize_t runtime_suspended_time_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
u64 tmp;
spin_lock_irq(&dev->power.lock);
update_pm_runtime_accounting(dev);
tmp = dev->power.suspended_time;
u64 tmp = pm_runtime_suspended_time(dev);
do_div(tmp, NSEC_PER_MSEC);
ret = sprintf(buf, "%llu\n", tmp);
spin_unlock_irq(&dev->power.lock);
return ret;
}

1
include/linux/pm.h
View File

@ -643,7 +643,6 @@ struct dev_pm_info {
struct dev_pm_qos *qos;
};
extern void update_pm_runtime_accounting(struct device *dev);
extern int dev_pm_get_subsys_data(struct device *dev);
extern void dev_pm_put_subsys_data(struct device *dev);