diff options
| -rw-r--r-- | drivers/base/dd.c | 3 | ||||
| -rw-r--r-- | drivers/base/power/common.c | 3 | ||||
| -rw-r--r-- | drivers/base/power/domain.c | 2 | ||||
| -rw-r--r-- | drivers/base/power/main.c | 35 | ||||
| -rw-r--r-- | drivers/base/power/power.h | 3 | ||||
| -rw-r--r-- | include/linux/pm.h | 1 |
6 files changed, 47 insertions, 0 deletions
diff --git a/drivers/base/dd.c b/drivers/base/dd.c index 13a0d66e5782..049942176b00 100644 --- a/drivers/base/dd.c +++ b/drivers/base/dd.c @@ -250,6 +250,8 @@ static void driver_bound(struct device *dev) klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices); + device_pm_check_callbacks(dev); + /* * Make sure the device is no longer in one of the deferred lists and * kick off retrying all pending devices @@ -766,6 +768,7 @@ static void __device_release_driver(struct device *dev) pm_runtime_reinit(dev); klist_remove(&dev->p->knode_driver); + device_pm_check_callbacks(dev); if (dev->bus) blocking_notifier_call_chain(&dev->bus->p->bus_notifier, BUS_NOTIFY_UNBOUND_DRIVER, diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c index 02812bcabcac..93ed14cc2252 100644 --- a/drivers/base/power/common.c +++ b/drivers/base/power/common.c @@ -14,6 +14,8 @@ #include <linux/acpi.h> #include <linux/pm_domain.h> +#include "power.h" + /** * dev_pm_get_subsys_data - Create or refcount power.subsys_data for device. * @dev: Device to handle. @@ -147,5 +149,6 @@ void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd) WARN(device_is_bound(dev), "PM domains can only be changed for unbound devices\n"); dev->pm_domain = pd; + device_pm_check_callbacks(dev); } EXPORT_SYMBOL_GPL(dev_pm_domain_set); diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index abbac6fe8fd5..33a5f4b752ed 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -20,6 +20,8 @@ #include <linux/suspend.h> #include <linux/export.h> +#include "power.h" + #define GENPD_RETRY_MAX_MS 250 /* Approximate */ #define GENPD_DEV_CALLBACK(genpd, type, callback, dev) \ diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 9d626ac08d9c..6e7c3ccea24b 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -125,6 +125,7 @@ void device_pm_add(struct device *dev) { pr_debug("PM: Adding info for %s:%s\n", dev->bus ? dev->bus->name : "No Bus", dev_name(dev)); + device_pm_check_callbacks(dev); mutex_lock(&dpm_list_mtx); if (dev->parent && dev->parent->power.is_prepared) dev_warn(dev, "parent %s should not be sleeping\n", @@ -147,6 +148,7 @@ void device_pm_remove(struct device *dev) mutex_unlock(&dpm_list_mtx); device_wakeup_disable(dev); pm_runtime_remove(dev); + device_pm_check_callbacks(dev); } /** @@ -1572,6 +1574,11 @@ static int device_prepare(struct device *dev, pm_message_t state) dev->power.wakeup_path = device_may_wakeup(dev); + if (dev->power.no_pm_callbacks) { + ret = 1; /* Let device go direct_complete */ + goto unlock; + } + if (dev->pm_domain) { info = "preparing power domain "; callback = dev->pm_domain->ops.prepare; @@ -1594,6 +1601,7 @@ static int device_prepare(struct device *dev, pm_message_t state) if (callback) ret = callback(dev); +unlock: device_unlock(dev); if (ret < 0) { @@ -1736,3 +1744,30 @@ void dpm_for_each_dev(void *data, void (*fn)(struct device *, void *)) device_pm_unlock(); } EXPORT_SYMBOL_GPL(dpm_for_each_dev); + +static bool pm_ops_is_empty(const struct dev_pm_ops *ops) +{ + if (!ops) + return true; + + return !ops->prepare && + !ops->suspend && + !ops->suspend_late && + !ops->suspend_noirq && + !ops->resume_noirq && + !ops->resume_early && + !ops->resume && + !ops->complete; +} + +void device_pm_check_callbacks(struct device *dev) +{ + spin_lock_irq(&dev->power.lock); + dev->power.no_pm_callbacks = + (!dev->bus || pm_ops_is_empty(dev->bus->pm)) && + (!dev->class || pm_ops_is_empty(dev->class->pm)) && + (!dev->type || pm_ops_is_empty(dev->type->pm)) && + (!dev->pm_domain || pm_ops_is_empty(&dev->pm_domain->ops)) && + (!dev->driver || pm_ops_is_empty(dev->driver->pm)); + spin_unlock_irq(&dev->power.lock); +} diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h index 8b06193d4a5e..50e30e7b059d 100644 --- a/drivers/base/power/power.h +++ b/drivers/base/power/power.h @@ -125,6 +125,7 @@ extern void device_pm_remove(struct device *); extern void device_pm_move_before(struct device *, struct device *); extern void device_pm_move_after(struct device *, struct device *); extern void device_pm_move_last(struct device *); +extern void device_pm_check_callbacks(struct device *dev); #else /* !CONFIG_PM_SLEEP */ @@ -143,6 +144,8 @@ static inline void device_pm_move_after(struct device *deva, struct device *devb) {} static inline void device_pm_move_last(struct device *dev) {} +static inline void device_pm_check_callbacks(struct device *dev) {} + #endif /* !CONFIG_PM_SLEEP */ static inline void device_pm_init(struct device *dev) diff --git a/include/linux/pm.h b/include/linux/pm.h index 528be6787796..6a5d654f4447 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -573,6 +573,7 @@ struct dev_pm_info { struct wakeup_source *wakeup; bool wakeup_path:1; bool syscore:1; + bool no_pm_callbacks:1; /* Owned by the PM core */ #else unsigned int should_wakeup:1; #endif |