static ACPI_STATUS
acpi_ns_get_device_callback (
ACPI_HANDLE obj_handle,
u32 nesting_level,
void *context,
void **return_value)
{
ACPI_STATUS status;
ACPI_NAMESPACE_NODE *node;
u32 flags;
DEVICE_ID device_id;
ACPI_GET_DEVICES_INFO *info;
info = context;
acpi_cm_acquire_mutex (ACPI_MTX_NAMESPACE);
node = acpi_ns_convert_handle_to_entry (obj_handle);
if (!node) {
acpi_cm_release_mutex (ACPI_MTX_NAMESPACE);
return (AE_BAD_PARAMETER);
}
acpi_cm_release_mutex (ACPI_MTX_NAMESPACE);
/*
* Run _STA to determine if device is present
*/
status = acpi_cm_execute_STA (node, &flags);
if (ACPI_FAILURE (status)) {
return (status);
}
if (!(flags & 0x01)) {
/* don't return at the device or children of the device if not there */
return (AE_CTRL_DEPTH);
}
/*
* Filter based on device HID
*/
if (info->hid != NULL) {
status = acpi_cm_execute_HID (node, &device_id);
if (status == AE_NOT_FOUND) {
return (AE_OK);
}
else if (ACPI_FAILURE (status)) {
return (status);
}
if (STRNCMP (device_id.buffer, info->hid, sizeof (device_id.buffer)) != 0) {
return (AE_OK);
}
}
info->user_function (obj_handle, nesting_level, info->context, return_value);
return (AE_OK);
}
