diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/scan.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 269c0aae4bed..53b96e7a64ab 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1155,6 +1155,16 @@ static void acpi_device_set_id(struct acpi_device *device) break; } + /* + * We build acpi_devices for some objects that don't have _HID or _CID, + * e.g., PCI bridges and slots. Drivers can't bind to these objects, + * but we do use them indirectly by traversing the acpi_device tree. + * This generic ID isn't useful for driver binding, but it provides + * the useful property that "every acpi_device has an ID." + */ + if (!hid && !cid_list && !cid_add) + hid = "device"; + if (hid) { device->pnp.hardware_id = ACPI_ALLOCATE_ZEROED(strlen (hid) + 1); if (device->pnp.hardware_id) { |