+/*
+ * Old IBM workstations have a DSDT bug wherein the SMBus object
+ * lacks the SMBUS01 HID and the methods do not have the necessary "_"
+ * prefix. Work around this.
+ */
+static int acpi_ibm_smbus_match(struct acpi_device *device)
+{
+ acpi_handle h_dummy;
+ struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL};
+ int result;
+
+ if (!dmi_name_in_vendors("IBM"))
+ return -ENODEV;
+
+ /* Look for SMBS object */
+ result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path);
+ if (result)
+ return result;
+
+ if (strcmp("SMBS", path.pointer)) {
+ result = -ENODEV;
+ goto out;
+ }
+
+ /* Does it have the necessary (but misnamed) methods? */
+ result = -ENODEV;
+ if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) &&
+ ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) &&
+ ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy)))
+ result = 0;
+out:
+ kfree(path.pointer);
+ return result;
+}
+