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Merge branches 'pm-domains', 'pm-sleep' and 'pm-cpufreq'

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* pm-domains:
  PM / Domains: Fix initial default state of the need_restore flag
  PM / Domains: Change prototype for the attach and detach callbacks

* pm-sleep:
  PM / sleep: Fix entering suspend-to-IDLE if no freeze_oops is set

* pm-cpufreq:
  cpufreq: Avoid crash in resume on SMP without OPP
  cpufreq: cpufreq-dt: Fix arguments in clock failure error message
This commit is contained in:
Rafael J. Wysocki 2014-11-14 15:17:32 +01:00
commit 31689497d9
5 changed files with 45 additions and 16 deletions
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42
drivers/base/power/domain.c
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@ -361,9 +361,19 @@ static int __pm_genpd_save_device(struct pm_domain_data *pdd,
struct device *dev = pdd->dev;
int ret = 0;
if (gpd_data->need_restore)
if (gpd_data->need_restore > 0)
return 0;
/*
* If the value of the need_restore flag is still unknown at this point,
* we trust that pm_genpd_poweroff() has verified that the device is
* already runtime PM suspended.
*/
if (gpd_data->need_restore < 0) {
gpd_data->need_restore = 1;
return 0;
}
mutex_unlock(&genpd->lock);
genpd_start_dev(genpd, dev);
@ -373,7 +383,7 @@ static int __pm_genpd_save_device(struct pm_domain_data *pdd,
mutex_lock(&genpd->lock);
if (!ret)
gpd_data->need_restore = true;
gpd_data->need_restore = 1;
return ret;
}
@ -389,12 +399,17 @@ static void __pm_genpd_restore_device(struct pm_domain_data *pdd,
{
struct generic_pm_domain_data *gpd_data = to_gpd_data(pdd);
struct device *dev = pdd->dev;
bool need_restore = gpd_data->need_restore;
int need_restore = gpd_data->need_restore;
gpd_data->need_restore = false;
gpd_data->need_restore = 0;
mutex_unlock(&genpd->lock);
genpd_start_dev(genpd, dev);
/*
* Call genpd_restore_dev() for recently added devices too (need_restore
* is negative then).
*/
if (need_restore)
genpd_restore_dev(genpd, dev);
@ -603,6 +618,7 @@ static void genpd_power_off_work_fn(struct work_struct *work)
static int pm_genpd_runtime_suspend(struct device *dev)
{
struct generic_pm_domain *genpd;
struct generic_pm_domain_data *gpd_data;
bool (*stop_ok)(struct device *__dev);
int ret;
@ -628,6 +644,16 @@ static int pm_genpd_runtime_suspend(struct device *dev)
return 0;
mutex_lock(&genpd->lock);
/*
* If we have an unknown state of the need_restore flag, it means none
* of the runtime PM callbacks has been invoked yet. Let's update the
* flag to reflect that the current state is active.
*/
gpd_data = to_gpd_data(dev->power.subsys_data->domain_data);
if (gpd_data->need_restore < 0)
gpd_data->need_restore = 0;
genpd->in_progress++;
pm_genpd_poweroff(genpd);
genpd->in_progress--;
@ -1437,12 +1463,12 @@ int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
spin_unlock_irq(&dev->power.lock);
if (genpd->attach_dev)
genpd->attach_dev(dev);
genpd->attach_dev(genpd, dev);
mutex_lock(&gpd_data->lock);
gpd_data->base.dev = dev;
list_add_tail(&gpd_data->base.list_node, &genpd->dev_list);
gpd_data->need_restore = genpd->status == GPD_STATE_POWER_OFF;
gpd_data->need_restore = -1;
gpd_data->td.constraint_changed = true;
gpd_data->td.effective_constraint_ns = -1;
mutex_unlock(&gpd_data->lock);
@ -1499,7 +1525,7 @@ int pm_genpd_remove_device(struct generic_pm_domain *genpd,
genpd->max_off_time_changed = true;
if (genpd->detach_dev)
genpd->detach_dev(dev);
genpd->detach_dev(genpd, dev);
spin_lock_irq(&dev->power.lock);
@ -1546,7 +1572,7 @@ void pm_genpd_dev_need_restore(struct device *dev, bool val)
psd = dev_to_psd(dev);
if (psd && psd->domain_data)
to_gpd_data(psd->domain_data)->need_restore = val;
to_gpd_data(psd->domain_data)->need_restore = val ? 1 : 0;
spin_unlock_irqrestore(&dev->power.lock, flags);
}