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Merge branch 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6 

* 'pm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6:
  PM / Runtime: Allow _put_sync() from interrupts-disabled context
  PM / Domains: Fix pm_genpd_poweron()
This commit is contained in:
Linus Torvalds 2011-08-06 13:26:37 -07:00
parent 2560540b78 02b26774af
commit ce195d3284
3 changed files with 14 additions and 9 deletions
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10
Documentation/power/runtime_pm.txt
View File

@ -54,11 +54,10 @@ referred to as subsystem-level callbacks in what follows.
By default, the callbacks are always invoked in process context with interrupts By default, the callbacks are always invoked in process context with interrupts
enabled. However, subsystems can use the pm_runtime_irq_safe() helper function enabled. However, subsystems can use the pm_runtime_irq_safe() helper function
to tell the PM core that a device's ->runtime_suspend() and ->runtime_resume() to tell the PM core that a device's ->runtime_suspend() and ->runtime_resume()
callbacks should be invoked in atomic context with interrupts disabled callbacks should be invoked in atomic context with interrupts disabled.
(->runtime_idle() is still invoked the default way). This implies that these This implies that these callback routines must not block or sleep, but it also
callback routines must not block or sleep, but it also means that the means that the synchronous helper functions listed at the end of Section 4 can
synchronous helper functions listed at the end of Section 4 can be used within be used within an interrupt handler or in an atomic context.
an interrupt handler or in an atomic context.
The subsystem-level suspend callback is _entirely_ _responsible_ for handling The subsystem-level suspend callback is _entirely_ _responsible_ for handling
the suspend of the device as appropriate, which may, but need not include the suspend of the device as appropriate, which may, but need not include
@ -483,6 +482,7 @@ pm_runtime_suspend()
pm_runtime_autosuspend() pm_runtime_autosuspend()
pm_runtime_resume() pm_runtime_resume()
pm_runtime_get_sync() pm_runtime_get_sync()
pm_runtime_put_sync()
pm_runtime_put_sync_suspend() pm_runtime_put_sync_suspend()
5. Runtime PM Initialization, Device Probing and Removal 5. Runtime PM Initialization, Device Probing and Removal

3
drivers/base/power/domain.c
View File

@ -80,7 +80,6 @@ static void genpd_set_active(struct generic_pm_domain *genpd)
int pm_genpd_poweron(struct generic_pm_domain *genpd) int pm_genpd_poweron(struct generic_pm_domain *genpd)
{ {
struct generic_pm_domain *parent = genpd->parent; struct generic_pm_domain *parent = genpd->parent;
DEFINE_WAIT(wait);
int ret = 0; int ret = 0;
start: start:
@ -112,7 +111,7 @@ int pm_genpd_poweron(struct generic_pm_domain *genpd)
} }
if (genpd->power_on) { if (genpd->power_on) {
int ret = genpd->power_on(genpd); ret = genpd->power_on(genpd);
if (ret) if (ret)
goto out; goto out;
} }

10
drivers/base/power/runtime.c
View File

@ -226,11 +226,17 @@ static int rpm_idle(struct device *dev, int rpmflags)
callback = NULL; callback = NULL;
if (callback) { if (callback) {
spin_unlock_irq(&dev->power.lock); if (dev->power.irq_safe)
spin_unlock(&dev->power.lock);
else
spin_unlock_irq(&dev->power.lock);
callback(dev); callback(dev);
spin_lock_irq(&dev->power.lock); if (dev->power.irq_safe)
spin_lock(&dev->power.lock);
else
spin_lock_irq(&dev->power.lock);
} }
dev->power.idle_notification = false; dev->power.idle_notification = false;