1877e267b3
Registering an ACPI driver does not mean the device it handles has to exist. As the code which syncs backlight power status uses call_fext_func(), it needs the FUJ02E3 ACPI device to be present, so ensure that code is only run once the FUJ02E3 device is detected. Signed-off-by: Michał Kępień <kernel@kempniu.pl> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-and-tested-by: Jonathan Woithe <jwoithe@just42.net>