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PM / Wakeup: Replace pm_check_wakeup_events() with pm_wakeup_pending()

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To avoid confusion with the meaning and return value of
pm_check_wakeup_events() replace it with pm_wakeup_pending() that
will work the other way around (ie. return true when system-wide
power transition should be aborted).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
Rafael J. Wysocki 2010-12-03 22:58:31 +01:00
parent 1e75227ef0
commit a2867e08c8
6 changed files with 17 additions and 17 deletions
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2
drivers/base/power/main.c
View file

@ -1056,7 +1056,7 @@ static int dpm_prepare(pm_message_t state)
if (pm_runtime_barrier(dev) && device_may_wakeup(dev))
pm_wakeup_event(dev, 0);
if (!pm_check_wakeup_events()) {
if (pm_wakeup_pending()) {
pm_runtime_put_sync(dev);
error = -EBUSY;
} else {

20
drivers/base/power/wakeup.c
View file

@ -542,26 +542,26 @@ static void pm_wakeup_update_hit_counts(void)
}
/**
* pm_check_wakeup_events - Check for new wakeup events.
* pm_wakeup_pending - Check if power transition in progress should be aborted.
*
* Compare the current number of registered wakeup events with its preserved
* value from the past to check if new wakeup events have been registered since
* the old value was stored. Check if the current number of wakeup events being
* processed is zero.
* value from the past and return true if new wakeup events have been registered
* since the old value was stored. Also return true if the current number of
* wakeup events being processed is different from zero.
*/
bool pm_check_wakeup_events(void)
bool pm_wakeup_pending(void)
{
unsigned long flags;
bool ret = true;
bool ret = false;
spin_lock_irqsave(&events_lock, flags);
if (events_check_enabled) {
ret = ((unsigned int)atomic_read(&event_count) == saved_count)
&& !atomic_read(&events_in_progress);
events_check_enabled = ret;
ret = ((unsigned int)atomic_read(&event_count) != saved_count)
|| atomic_read(&events_in_progress);
events_check_enabled = !ret;
}
spin_unlock_irqrestore(&events_lock, flags);
if (!ret)
if (ret)
pm_wakeup_update_hit_counts();
return ret;
}

4
include/linux/suspend.h
View file

@ -292,7 +292,7 @@ extern int unregister_pm_notifier(struct notifier_block *nb);
/* drivers/base/power/wakeup.c */
extern bool events_check_enabled;
extern bool pm_check_wakeup_events(void);
extern bool pm_wakeup_pending(void);
extern bool pm_get_wakeup_count(unsigned int *count);
extern bool pm_save_wakeup_count(unsigned int count);
#else /* !CONFIG_PM_SLEEP */
@ -309,7 +309,7 @@ static inline int unregister_pm_notifier(struct notifier_block *nb)
#define pm_notifier(fn, pri) do { (void)(fn); } while (0)
static inline bool pm_check_wakeup_events(void) { return true; }
static inline bool pm_wakeup_pending(void) { return false; }
#endif /* !CONFIG_PM_SLEEP */
extern struct mutex pm_mutex;

4
kernel/power/hibernate.c
View file

@ -278,7 +278,7 @@ static int create_image(int platform_mode)
goto Enable_irqs;
}
if (hibernation_test(TEST_CORE) || !pm_check_wakeup_events())
if (hibernation_test(TEST_CORE) || pm_wakeup_pending())
goto Power_up;
in_suspend = 1;
@ -516,7 +516,7 @@ int hibernation_platform_enter(void)
local_irq_disable();
sysdev_suspend(PMSG_HIBERNATE);
if (!pm_check_wakeup_events()) {
if (pm_wakeup_pending()) {
error = -EAGAIN;
goto Power_up;
}

2
kernel/power/process.c
View file

@ -85,7 +85,7 @@ static int try_to_freeze_tasks(bool sig_only)
if (!todo || time_after(jiffies, end_time))
break;
if (!pm_check_wakeup_events()) {
if (pm_wakeup_pending()) {
wakeup = true;
break;
}

2
kernel/power/suspend.c
View file

@ -163,7 +163,7 @@ static int suspend_enter(suspend_state_t state)
error = sysdev_suspend(PMSG_SUSPEND);
if (!error) {
if (!suspend_test(TEST_CORE) && pm_check_wakeup_events()) {
if (!(suspend_test(TEST_CORE) || pm_wakeup_pending())) {
error = suspend_ops->enter(state);
events_check_enabled = false;
}