diff options
Diffstat (limited to 'drivers/base/power/main.c')
| -rw-r--r-- | drivers/base/power/main.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 58a3e572f2c..86990011277 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -21,6 +21,7 @@ #include <linux/kallsyms.h> #include <linux/mutex.h> #include <linux/pm.h> +#include <linux/pm_runtime.h> #include <linux/resume-trace.h> #include <linux/rwsem.h> #include <linux/interrupt.h> @@ -49,6 +50,16 @@ static DEFINE_MUTEX(dpm_list_mtx); static bool transition_started; /** + * device_pm_init - Initialize the PM-related part of a device object + * @dev: Device object being initialized. + */ +void device_pm_init(struct device *dev) +{ + dev->power.status = DPM_ON; + pm_runtime_init(dev); +} + +/** * device_pm_lock - lock the list of active devices used by the PM core */ void device_pm_lock(void) @@ -105,6 +116,7 @@ void device_pm_remove(struct device *dev) mutex_lock(&dpm_list_mtx); list_del_init(&dev->power.entry); mutex_unlock(&dpm_list_mtx); + pm_runtime_remove(dev); } /** @@ -157,8 +169,9 @@ void device_pm_move_last(struct device *dev) * @ops: PM operations to choose from. * @state: PM transition of the system being carried out. */ -static int pm_op(struct device *dev, struct dev_pm_ops *ops, - pm_message_t state) +static int pm_op(struct device *dev, + const struct dev_pm_ops *ops, + pm_message_t state) { int error = 0; @@ -220,7 +233,8 @@ static int pm_op(struct device *dev, struct dev_pm_ops *ops, * The operation is executed with interrupts disabled by the only remaining * functional CPU in the system. */ -static int pm_noirq_op(struct device *dev, struct dev_pm_ops *ops, +static int pm_noirq_op(struct device *dev, + const struct dev_pm_ops *ops, pm_message_t state) { int error = 0; @@ -510,6 +524,7 @@ static void dpm_complete(pm_message_t state) mutex_unlock(&dpm_list_mtx); device_complete(dev, state); + pm_runtime_put_noidle(dev); mutex_lock(&dpm_list_mtx); } @@ -755,7 +770,14 @@ static int dpm_prepare(pm_message_t state) dev->power.status = DPM_PREPARING; mutex_unlock(&dpm_list_mtx); - error = device_prepare(dev, state); + pm_runtime_get_noresume(dev); + if (pm_runtime_barrier(dev) && device_may_wakeup(dev)) { + /* Wake-up requested during system sleep transition. */ + pm_runtime_put_noidle(dev); + error = -EBUSY; + } else { + error = device_prepare(dev, state); + } mutex_lock(&dpm_list_mtx); if (error) { |