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ACPI / Fan: Rework the handling of power resources 

Use the new function acpi_bus_update_power() for manipulating power
resources used by ACPI fan devices, which allows them to be put into
the right state during initialization and resume.  Consequently,
remove the flags.force_power_state field from struct acpi_device,
which is not necessary any more.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Rafael J. Wysocki 2010-11-25 00:11:24 +01:00 committed by Len Brown
parent bf325f9538
commit 488a76c526
4 changed files with 12 additions and 25 deletions
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2
drivers/acpi/bus.c
View File

@ -266,7 +266,7 @@ static int __acpi_bus_set_power(struct acpi_device *device, int state)
/* Make sure this is a valid target state */
if ((state == device->power.state) && !device->flags.force_power_state) {
if (state == device->power.state) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
state));
return 0;

27
drivers/acpi/fan.c
View File

@ -86,7 +86,7 @@ static int fan_get_cur_state(struct thermal_cooling_device *cdev, unsigned long
if (!device)
return -EINVAL;
result = acpi_bus_get_power(device->handle, &acpi_state);
result = acpi_bus_update_power(device->handle, &acpi_state);
if (result)
return result;
@ -123,7 +123,6 @@ static struct thermal_cooling_device_ops fan_cooling_ops = {
static int acpi_fan_add(struct acpi_device *device)
{
int result = 0;
int state = 0;
struct thermal_cooling_device *cdev;
if (!device)
@ -132,16 +131,12 @@ static int acpi_fan_add(struct acpi_device *device)
strcpy(acpi_device_name(device), "Fan");
strcpy(acpi_device_class(device), ACPI_FAN_CLASS);
result = acpi_bus_get_power(device->handle, &state);
result = acpi_bus_update_power(device->handle, NULL);
if (result) {
printk(KERN_ERR PREFIX "Reading power state\n");
printk(KERN_ERR PREFIX "Setting initial power state\n");
goto end;
}
device->flags.force_power_state = 1;
acpi_bus_set_power(device->handle, state);
device->flags.force_power_state = 0;
cdev = thermal_cooling_device_register("Fan", device,
&fan_cooling_ops);
if (IS_ERR(cdev)) {
@ -200,22 +195,14 @@ static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state)
static int acpi_fan_resume(struct acpi_device *device)
{
int result = 0;
int power_state = 0;
int result;
if (!device)
return -EINVAL;
result = acpi_bus_get_power(device->handle, &power_state);
if (result) {
printk(KERN_ERR PREFIX
"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;
result = acpi_bus_update_power(device->handle, NULL);
if (result)
printk(KERN_ERR PREFIX "Error updating fan power state\n");
return result;
}

5
drivers/acpi/thermal.c
View File

@ -1059,8 +1059,9 @@ static int acpi_thermal_resume(struct acpi_device *device)
break;
tz->trips.active[i].flags.enabled = 1;
for (j = 0; j < tz->trips.active[i].devices.count; j++) {
result = acpi_bus_get_power(tz->trips.active[i].devices.
handles[j], &power_state);
result = acpi_bus_update_power(
tz->trips.active[i].devices.handles[j],
&power_state);
if (result || (power_state != ACPI_STATE_D0)) {
tz->trips.active[i].flags.enabled = 0;
break;

3
include/acpi/acpi_bus.h
View File

@ -149,8 +149,7 @@ struct acpi_device_flags {
u32 power_manageable:1;
u32 performance_manageable:1;
u32 wake_capable:1; /* Wakeup(_PRW) supported? */
u32 force_power_state:1;
u32 reserved:22;
u32 reserved:23;
};
/* File System */