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ACPI / property: Add routine for extraction of _DSD properties

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Move the extraction of _DSD properties from acpi_init_properties()
to a separate routine called acpi_extract_properties() to make the
subsequent changes more straightforward.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Rafael J. Wysocki 2015-08-27 04:35:14 +02:00
parent 6ff33f3902
commit bd8191cc8a
1 changed files with 39 additions and 34 deletions
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73
drivers/acpi/property.c
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@ -100,34 +100,13 @@ static void acpi_init_of_compatible(struct acpi_device *adev)
adev->flags.of_compatible_ok = 1;
}
void acpi_init_properties(struct acpi_device *adev)
static bool acpi_extract_properties(const union acpi_object *desc,
struct acpi_device_data *data)
{
struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
bool acpi_of = false;
struct acpi_hardware_id *hwid;
const union acpi_object *desc;
acpi_status status;
int i;
/*
* Check if ACPI_DT_NAMESPACE_HID is present and inthat case we fill in
* Device Tree compatible properties for this device.
*/
list_for_each_entry(hwid, &adev->pnp.ids, list) {
if (!strcmp(hwid->id, ACPI_DT_NAMESPACE_HID)) {
acpi_of = true;
break;
}
}
status = acpi_evaluate_object_typed(adev->handle, "_DSD", NULL, &buf,
ACPI_TYPE_PACKAGE);
if (ACPI_FAILURE(status))
goto out;
desc = buf.pointer;
if (desc->package.count % 2)
goto fail;
return false;
/* Look for the device properties UUID. */
for (i = 0; i < desc->package.count; i += 2) {
@ -154,18 +133,44 @@ void acpi_init_properties(struct acpi_device *adev)
if (!acpi_properties_format_valid(properties))
break;
adev->data.pointer = buf.pointer;
adev->data.properties = properties;
if (acpi_of)
acpi_init_of_compatible(adev);
goto out;
data->properties = properties;
return true;
}
fail:
dev_dbg(&adev->dev, "Returned _DSD data is not valid, skipping\n");
ACPI_FREE(buf.pointer);
return false;
}
void acpi_init_properties(struct acpi_device *adev)
{
struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER };
struct acpi_hardware_id *hwid;
acpi_status status;
bool acpi_of = false;
/*
* Check if ACPI_DT_NAMESPACE_HID is present and inthat case we fill in
* Device Tree compatible properties for this device.
*/
list_for_each_entry(hwid, &adev->pnp.ids, list) {
if (!strcmp(hwid->id, ACPI_DT_NAMESPACE_HID)) {
acpi_of = true;
break;
}
}
status = acpi_evaluate_object_typed(adev->handle, "_DSD", NULL, &buf,
ACPI_TYPE_PACKAGE);
if (ACPI_FAILURE(status))
goto out;
if (acpi_extract_properties(buf.pointer, &adev->data)) {
adev->data.pointer = buf.pointer;
if (acpi_of)
acpi_init_of_compatible(adev);
} else {
acpi_handle_debug(adev->handle, "Invalid _DSD data, skipping\n");
ACPI_FREE(buf.pointer);
}
out:
if (acpi_of && !adev->flags.of_compatible_ok)