diff options
author | Len Brown <len.brown@intel.com> | 2008-01-24 07:48:46 +0300 |
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committer | Len Brown <len.brown@intel.com> | 2008-01-24 07:48:46 +0300 |
commit | 3645ca8359328ea4c75bce4af54ad24028381f30 (patch) | |
tree | e66e33eb9d0bbbb66c9788ae44164e9e6b71c8d4 /drivers | |
parent | 0f23a6b0c182b1040cb0b89e20527cd07d85aebf (diff) | |
parent | ec68373c04495edbe39fb94fad963fb781e062e5 (diff) | |
download | linux-3645ca8359328ea4c75bce4af54ad24028381f30.tar.xz |
Pull bugzilla-9798 into release branch
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/acpi/bus.c | 2 | ||||
-rw-r--r-- | drivers/acpi/fan.c | 40 |
2 files changed, 41 insertions, 1 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index d7a115c362d1..f4487c38d9f2 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -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; diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c index a5a5532db268..a6e149d692cb 100644 --- a/drivers/acpi/fan.c +++ b/drivers/acpi/fan.c @@ -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; |