Re: [PATCH V7 08/11] ACPI: always register memory hotplug scan handler even if CONFIG_X86_INTEL_LPSS is cleared

[Mika Westerberg <mika.westerberg@linux.intel.com>]

On Mon, May 26, 2014 at 01:53:39PM +0200, Rafael J. Wysocki wrote:
> > I'm wondering whether it is worth the ugliness to get platform bus
> > enumeration the default?
> > 
> > Since you already have the PNP whitelist, can't we just use that for PNP
> > and keep these files as they are? In other words, don't make any kind of
> > physical device by default and let the scan handlers to decide.
> 
> Well, that's tempting, but then we'd get one more whitelist pretty much without
> any benefit, because we'd be still going to have the list in acpi_platform.c.
> 
> The purpose of the whole exercise is not to prevent PNP devices from being
> created by default (which admittedly is a nice side effect), but to get rid
> of the white list in acpi_platform.c - and in particular, to avoid the
> necessity to add every ACPI-enumerated platform device to that list in the
> future.

Yes, I understand but that list currently has only 5 entries. Are
we expecting to have much more entries there in the future?

For LPSS devices we can't get rid of the list since we need to pass
->driver_data based on the _HID anyway.