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ACPI: PM: Add acpi_device_fix_up_power_children() function 

commit 37ba91a82e3b9de35f64348c62b5ec7d74e3a41c upstream.

In some cases it is necessary to fix-up the power-state of an ACPI
device's children without touching the ACPI device itself add
a new acpi_device_fix_up_power_children() function for this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Cc: 6.6+ <stable@vger.kernel.org> # 6.6+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hans de Goede 2023-11-12 21:36:26 +01:00 committed by Greg Kroah-Hartman
parent a0bb55dbed
commit 9b9b04eb71
2 changed files with 14 additions and 0 deletions
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13
drivers/acpi/device_pm.c
View File

@ -397,6 +397,19 @@ void acpi_device_fix_up_power_extended(struct acpi_device *adev)
}
EXPORT_SYMBOL_GPL(acpi_device_fix_up_power_extended);
/**
* acpi_device_fix_up_power_children - Force a device's children into D0.
* @adev: Parent device object whose children's power state is to be fixed up.
*
* Call acpi_device_fix_up_power() for @adev's children so long as they
* are reported as present and enabled.
*/
void acpi_device_fix_up_power_children(struct acpi_device *adev)
{
acpi_dev_for_each_child(adev, fix_up_power_if_applicable, NULL);
}
EXPORT_SYMBOL_GPL(acpi_device_fix_up_power_children);
int acpi_device_update_power(struct acpi_device *device, int *state_p)
{
int state;

1
include/acpi/acpi_bus.h
View File

@ -539,6 +539,7 @@ int acpi_device_set_power(struct acpi_device *device, int state);
int acpi_bus_init_power(struct acpi_device *device);
int acpi_device_fix_up_power(struct acpi_device *device);
void acpi_device_fix_up_power_extended(struct acpi_device *adev);
void acpi_device_fix_up_power_children(struct acpi_device *adev);
int acpi_bus_update_power(acpi_handle handle, int *state_p);
int acpi_device_update_power(struct acpi_device *device, int *state_p);
bool acpi_bus_power_manageable(acpi_handle handle);