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Commit ec68373c authored by Len Brown's avatar Len Brown
Browse files

Revert "ACPI: Fan: Drop force_power_state acpi_device option" 

This reverts commit 93ad7c07.

http://bugzilla.kernel.org/show_bug.cgi?id=9798



Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 667984d9

drivers/acpi/bus.c

+1 −1
Original line number Diff line number Diff line
@@ -200,7 +200,7 @@ int acpi_bus_set_power(acpi_handle handle, int state) 
	 * Get device's current power state

	 */

	acpi_bus_get_power(device->handle, &device->power.state);

	if (state == device->power.state) {

	if ((state == device->power.state) && !device->flags.force_power_state) {

		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",

				  state));

		return 0;

drivers/acpi/fan.c

+40 −0
Original line number Diff line number Diff line
@@ -47,6 +47,8 @@ MODULE_LICENSE("GPL"); 


static int acpi_fan_add(struct acpi_device *device);

static int acpi_fan_remove(struct acpi_device *device, int type);

static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state);

static int acpi_fan_resume(struct acpi_device *device);



static const struct acpi_device_id fan_device_ids[] = {

	{"PNP0C0B", 0},
@@ -61,6 +63,8 @@ static struct acpi_driver acpi_fan_driver = { 
	.ops = {

		.add = acpi_fan_add,

		.remove = acpi_fan_remove,

		.suspend = acpi_fan_suspend,

		.resume = acpi_fan_resume,

		},

};
@@ -191,6 +195,10 @@ static int acpi_fan_add(struct acpi_device *device) 
		goto end;

	}



	device->flags.force_power_state = 1;

	acpi_bus_set_power(device->handle, state);

	device->flags.force_power_state = 0;



	result = acpi_fan_add_fs(device);

	if (result)

		goto end;
@@ -216,6 +224,38 @@ static int acpi_fan_remove(struct acpi_device *device, int type) 
	return 0;

}



static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state)

{

	if (!device)

		return -EINVAL;



	acpi_bus_set_power(device->handle, ACPI_STATE_D0);



	return AE_OK;

}



static int acpi_fan_resume(struct acpi_device *device)

{

	int result = 0;

	int power_state = 0;



	if (!device)

		return -EINVAL;



	result = acpi_bus_get_power(device->handle, &power_state);

	if (result) {

		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,

				  "Error reading fan power state\n"));

		return result;

	}



	device->flags.force_power_state = 1;

	acpi_bus_set_power(device->handle, power_state);

	device->flags.force_power_state = 0;



	return result;

}



static int __init acpi_fan_init(void)

{

	int result = 0;

include/acpi/acpi_bus.h

+2 −1
Original line number Diff line number Diff line
@@ -168,7 +168,8 @@ struct acpi_device_flags { 
	u32 power_manageable:1;

	u32 performance_manageable:1;

	u32 wake_capable:1;	/* Wakeup(_PRW) supported? */

	u32 reserved:20;

	u32 force_power_state:1;

	u32 reserved:19;

};



/* File System */