if (!d || !streq("pci", udev_device_get_subsystem(d)))
return -ENOENT;
- /* find SMBIOS type 41 entries for on-board devices */
- index = udev_device_get_sysattr_value(d, "index");
+ /* ACPI _SUN -- slot user number */
+ index = udev_device_get_sysattr_value(d, "acpi_index");
+ /* SMBIOS type 41 -- Onboard Devices Extended Information */
+ if (!index)
+ index = udev_device_get_sysattr_value(d, "index");
if (index) {
unsigned int idx;