static bool
device_has_dsm(struct device *dev)
{
acpi_handle handle;
struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
handle = DEVICE_ACPI_HANDLE(dev);
if (!handle)
return FALSE;
if (dsm_get_label(handle, DEVICE_LABEL_DSM, &output, NULL,
ACPI_ATTR_NONE) > 0)
return TRUE;
return FALSE;
}
static ssize_t
acpilabel_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
acpi_handle handle;
int length;
handle = DEVICE_ACPI_HANDLE(dev);
if (!handle)
return -1;
length = dsm_get_label(handle, DEVICE_LABEL_DSM,
&output, buf, ACPI_ATTR_LABEL_SHOW);
if (length < 1)
return -1;
return length;
}
static ssize_t acpiindex_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
return dsm_get_label(dev, buf, ACPI_ATTR_INDEX_SHOW);
}