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ACPI / PM: Take order attribute of wakeup power resources into account

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ACPI power resources have an order attribute that should be taken
into account when turning them on and off, but it is not used now.

Modify the power resources management code to preserve the
spec-compliant ordering of wakeup power resources.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki
2013-01-17 14:11:06 +01:00
parent 0b22452732
commit 993cbe595d
3 changed files with 33 additions and 39 deletions
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26
drivers/acpi/scan.c
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@@ -479,6 +479,9 @@ static void acpi_free_power_resources_lists(struct acpi_device *device)
{
int i;
if (device->wakeup.flags.valid)
acpi_power_resources_list_free(&device->wakeup.resources);
if (!device->flags.power_manageable)
return;
@@ -902,6 +905,8 @@ acpi_bus_extract_wakeup_device_power_package(acpi_handle handle,
if (!wakeup)
return AE_BAD_PARAMETER;
INIT_LIST_HEAD(&wakeup->resources);
/* _PRW */
status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer);
if (ACPI_FAILURE(status)) {
@@ -948,19 +953,17 @@ acpi_bus_extract_wakeup_device_power_package(acpi_handle handle,
}
wakeup->sleep_state = element->integer.value;
if ((package->package.count - 2) > ACPI_MAX_HANDLES) {
status = AE_NO_MEMORY;
goto out;
}
wakeup->resources.count = package->package.count - 2;
for (i = 0; i < wakeup->resources.count; i++) {
element = &(package->package.elements[i + 2]);
for (i = 2; i < package->package.count; i++) {
acpi_handle rhandle;
element = &(package->package.elements[i]);
if (element->type != ACPI_TYPE_LOCAL_REFERENCE) {
status = AE_BAD_DATA;
goto out;
}
wakeup->resources.handles[i] = element->reference.handle;
rhandle = element->reference.handle;
acpi_add_power_resource(rhandle);
acpi_power_resources_list_add(rhandle, &wakeup->resources);
}
acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number);
@@ -1018,6 +1021,7 @@ static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
status = acpi_bus_extract_wakeup_device_power_package(device->handle,
&device->wakeup);
if (ACPI_FAILURE(status)) {
acpi_power_resources_list_free(&device->wakeup.resources);
ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package"));
return;
}
@@ -1491,9 +1495,11 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
acpi_handle temp;
status = acpi_get_handle(handle, "_PRW", &temp);
if (ACPI_SUCCESS(status))
if (ACPI_SUCCESS(status)) {
acpi_bus_extract_wakeup_device_power_package(handle,
&wakeup);
acpi_power_resources_list_free(&wakeup.resources);
}
return AE_CTRL_DEPTH;
}