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ACPI: Get the device power state in the course of scanning device

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Get the device power state in the course of scanning device if the device
power flag is power_managable. i.e. The device has the _PSx/_PRx object.

At the same time before the drivers/acpi/power module is loaded, there is no
relation between acpi_power_resource and acpi device. So the first parameter
of acpi_power_get_state is changed to acpi_handle.

http://bugzilla.kernel.org/show_bug.cgi?id=8049
http://bugzilla.kernel.org/show_bug.cgi?id=11000

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Li Shaohua <shaohua.li@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Zhao Yakui 2008-08-11 14:55:05 +08:00 committed by Len Brown
parent 08237974af
commit a51e145f37
2 changed files with 17 additions and 14 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

30
drivers/acpi/power.c
View file

@ -128,16 +128,16 @@ acpi_power_get_context(acpi_handle handle,
return 0;
}
static int acpi_power_get_state(struct acpi_power_resource *resource, int *state)
static int acpi_power_get_state(acpi_handle handle, int *state)
{
acpi_status status = AE_OK;
unsigned long sta = 0;
if (!resource || !state)
if (!handle || !state)
return -EINVAL;
status = acpi_evaluate_integer(resource->device->handle, "_STA", NULL, &sta);
status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
if (ACPI_FAILURE(status))
return -ENODEV;
@ -145,7 +145,7 @@ static int acpi_power_get_state(struct acpi_power_resource *resource, int *state
ACPI_POWER_RESOURCE_STATE_OFF;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] is %s\n",
resource->name, state ? "on" : "off"));
acpi_ut_get_node_name(handle), state ? "on" : "off"));
return 0;
}
@ -153,7 +153,6 @@ static int acpi_power_get_state(struct acpi_power_resource *resource, int *state
static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
{
int result = 0, state1;
struct acpi_power_resource *resource = NULL;
u32 i = 0;
@ -161,12 +160,15 @@ static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
return -EINVAL;
/* The state of the list is 'on' IFF all resources are 'on'. */
/* */
for (i = 0; i < list->count; i++) {
result = acpi_power_get_context(list->handles[i], &resource);
if (result)
return result;
result = acpi_power_get_state(resource, &state1);
/*
* The state of the power resource can be obtained by
* using the ACPI handle. In such case it is unnecessary to
* get the Power resource first and then get its state again.
*/
result = acpi_power_get_state(list->handles[i], &state1);
if (result)
return result;
@ -226,7 +228,7 @@ static int acpi_power_on(acpi_handle handle, struct acpi_device *dev)
if (ACPI_FAILURE(status))
return -ENODEV;
result = acpi_power_get_state(resource, &state);
result = acpi_power_get_state(resource->device->handle, &state);
if (result)
return result;
if (state != ACPI_POWER_RESOURCE_STATE_ON)
@ -277,7 +279,7 @@ static int acpi_power_off_device(acpi_handle handle, struct acpi_device *dev)
if (ACPI_FAILURE(status))
return -ENODEV;
result = acpi_power_get_state(resource, &state);
result = acpi_power_get_state(handle, &state);
if (result)
return result;
if (state != ACPI_POWER_RESOURCE_STATE_OFF)
@ -555,7 +557,7 @@ static int acpi_power_seq_show(struct seq_file *seq, void *offset)
if (!resource)
goto end;
result = acpi_power_get_state(resource, &state);
result = acpi_power_get_state(resource->device->handle, &state);
if (result)
goto end;
@ -668,7 +670,7 @@ static int acpi_power_add(struct acpi_device *device)
resource->system_level = acpi_object.power_resource.system_level;
resource->order = acpi_object.power_resource.resource_order;
result = acpi_power_get_state(resource, &state);
result = acpi_power_get_state(device->handle, &state);
if (result)
goto end;
@ -735,7 +737,7 @@ static int acpi_power_resume(struct acpi_device *device)
resource = (struct acpi_power_resource *)acpi_driver_data(device);
result = acpi_power_get_state(resource, &state);
result = acpi_power_get_state(device->handle, &state);
if (result)
return result;

1
drivers/acpi/scan.c
View file

@ -807,6 +807,7 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
/* TBD: System wake support and resource requirements. */
device->power.state = ACPI_STATE_UNKNOWN;
acpi_bus_get_power(device->handle, &(device->power.state));
return 0;
}