acpi_bus_scan — Add ACPI device node objects in a given namespace scope.
Scan a given ACPI tree (probably recently hot-plugged) and create and add found devices.
If no devices were found, -ENODEV is returned, but it does not mean that there has been a real error. There just have been no suitable ACPI objects in the table trunk from which the kernel could create a device and add an appropriate driver.
Must be called under acpi_scan_lock.