diff options
Diffstat (limited to 'drivers/acpi/power.c')
| -rw-r--r-- | drivers/acpi/power.c | 112 |
1 files changed, 85 insertions, 27 deletions
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c index b820528a5fa3..34f5ef11d427 100644 --- a/drivers/acpi/power.c +++ b/drivers/acpi/power.c @@ -73,6 +73,7 @@ struct acpi_power_resource { u32 system_level; u32 order; unsigned int ref_count; + bool wakeup_enabled; struct mutex resource_lock; }; @@ -272,11 +273,9 @@ static int __acpi_power_on(struct acpi_power_resource *resource) return 0; } -static int acpi_power_on(struct acpi_power_resource *resource) +static int acpi_power_on_unlocked(struct acpi_power_resource *resource) { - int result = 0;; - - mutex_lock(&resource->resource_lock); + int result = 0; if (resource->ref_count++) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, @@ -293,9 +292,16 @@ static int acpi_power_on(struct acpi_power_resource *resource) schedule_work(&dep->work); } } + return result; +} - mutex_unlock(&resource->resource_lock); +static int acpi_power_on(struct acpi_power_resource *resource) +{ + int result; + mutex_lock(&resource->resource_lock); + result = acpi_power_on_unlocked(resource); + mutex_unlock(&resource->resource_lock); return result; } @@ -313,17 +319,15 @@ static int __acpi_power_off(struct acpi_power_resource *resource) return 0; } -static int acpi_power_off(struct acpi_power_resource *resource) +static int acpi_power_off_unlocked(struct acpi_power_resource *resource) { int result = 0; - mutex_lock(&resource->resource_lock); - if (!resource->ref_count) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Power resource [%s] already off", resource->name)); - goto unlock; + return 0; } if (--resource->ref_count) { @@ -335,10 +339,16 @@ static int acpi_power_off(struct acpi_power_resource *resource) if (result) resource->ref_count++; } + return result; +} - unlock: - mutex_unlock(&resource->resource_lock); +static int acpi_power_off(struct acpi_power_resource *resource) +{ + int result; + mutex_lock(&resource->resource_lock); + result = acpi_power_off_unlocked(resource); + mutex_unlock(&resource->resource_lock); return result; } @@ -521,18 +531,35 @@ void acpi_power_add_remove_device(struct acpi_device *adev, bool add) } } -int acpi_power_min_system_level(struct list_head *list) +int acpi_power_wakeup_list_init(struct list_head *list, int *system_level_p) { struct acpi_power_resource_entry *entry; int system_level = 5; list_for_each_entry(entry, list, node) { struct acpi_power_resource *resource = entry->resource; + acpi_handle handle = resource->device.handle; + int result; + int state; + mutex_lock(&resource->resource_lock); + + result = acpi_power_get_state(handle, &state); + if (result) { + mutex_unlock(&resource->resource_lock); + return result; + } + if (state == ACPI_POWER_RESOURCE_STATE_ON) { + resource->ref_count++; + resource->wakeup_enabled = true; + } if (system_level > resource->system_level) system_level = resource->system_level; + + mutex_unlock(&resource->resource_lock); } - return system_level; + *system_level_p = system_level; + return 0; } /* -------------------------------------------------------------------------- @@ -610,6 +637,7 @@ int acpi_device_sleep_wake(struct acpi_device *dev, */ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state) { + struct acpi_power_resource_entry *entry; int err = 0; if (!dev || !dev->wakeup.flags.valid) @@ -620,17 +648,31 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state) if (dev->wakeup.prepare_count++) goto out; - err = acpi_power_on_list(&dev->wakeup.resources); - if (err) { - dev_err(&dev->dev, "Cannot turn wakeup power resources on\n"); - dev->wakeup.flags.valid = 0; - } else { - /* - * Passing 3 as the third argument below means the device may be - * put into arbitrary power state afterward. - */ - err = acpi_device_sleep_wake(dev, 1, sleep_state, 3); + list_for_each_entry(entry, &dev->wakeup.resources, node) { + struct acpi_power_resource *resource = entry->resource; + + mutex_lock(&resource->resource_lock); + + if (!resource->wakeup_enabled) { + err = acpi_power_on_unlocked(resource); + if (!err) + resource->wakeup_enabled = true; + } + + mutex_unlock(&resource->resource_lock); + + if (err) { + dev_err(&dev->dev, + "Cannot turn wakeup power resources on\n"); + dev->wakeup.flags.valid = 0; + goto out; + } } + /* + * Passing 3 as the third argument below means the device may be + * put into arbitrary power state afterward. + */ + err = acpi_device_sleep_wake(dev, 1, sleep_state, 3); if (err) dev->wakeup.prepare_count = 0; @@ -647,6 +689,7 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state) */ int acpi_disable_wakeup_device_power(struct acpi_device *dev) { + struct acpi_power_resource_entry *entry; int err = 0; if (!dev || !dev->wakeup.flags.valid) @@ -668,10 +711,25 @@ int acpi_disable_wakeup_device_power(struct acpi_device *dev) if (err) goto out; - err = acpi_power_off_list(&dev->wakeup.resources); - if (err) { - dev_err(&dev->dev, "Cannot turn wakeup power resources off\n"); - dev->wakeup.flags.valid = 0; + list_for_each_entry(entry, &dev->wakeup.resources, node) { + struct acpi_power_resource *resource = entry->resource; + + mutex_lock(&resource->resource_lock); + + if (resource->wakeup_enabled) { + err = acpi_power_off_unlocked(resource); + if (!err) + resource->wakeup_enabled = false; + } + + mutex_unlock(&resource->resource_lock); + + if (err) { + dev_err(&dev->dev, + "Cannot turn wakeup power resources off\n"); + dev->wakeup.flags.valid = 0; + break; + } } out: |