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authorLen Brown <len.brown@intel.com>2008-01-23 23:48:46 -0500
committerLen Brown <len.brown@intel.com>2008-01-23 23:48:46 -0500
commit3645ca8359328ea4c75bce4af54ad24028381f30 (patch)
treee66e33eb9d0bbbb66c9788ae44164e9e6b71c8d4
parent0f23a6b0c182b1040cb0b89e20527cd07d85aebf (diff)
parentec68373c04495edbe39fb94fad963fb781e062e5 (diff)
Pull bugzilla-9798 into release branch
-rw-r--r--drivers/acpi/bus.c2
-rw-r--r--drivers/acpi/fan.c40
-rw-r--r--include/acpi/acpi_bus.h3
3 files changed, 43 insertions, 2 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;
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 19c3ead2a90b..7b74b60a68a4 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -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 */