Re: ACPI_BUS dependency for CONFIG_PNP

[Andi Kleen <ak-l3A5Bk7waGM@public.gmane.org>]

On Mon, Nov 15, 2004 at 11:42:47AM -0500, Brown, Len wrote:
> On Mon, 2004-11-15 at 06:46, Andi Kleen wrote:
> > 2.6.10rc2 got this new dependency:
> > 
> > config PNP
> >         bool "Plug and Play support"
> >         depends on ISA || ACPI_BUS
> > 
> > from the ACPI update. This enables ISA-PNP on x86-64, where
> > it was always disabled previously and is completely useless. Can
> > someone
> > explain the rationale behind that change? IMHO you should never use
> > ISA-PNP without CONFIG_ISA.
> 
> Linux PNP handles up to 3 protocols:
> ISAPNP -- useful only if CONFIG_ISA, independent of PNPBIOS and PNPACPI
> PNPBIOS -- useful only if acpi_disabled
> PNPACPI -- useful if !acpi_disabled

Useful for what? As far as I know no device on x86-64 needs PNPBIOS
or PNPACPI

> 
> drivers/pnp/isapnp/Kconfig appears to already have the dependency you're
> looking for to make sure that ISAPNP is not defined without CONFIG_ISA:
> 
> config ISAPNP
>         bool "ISA Plug and Play support"
>         depends on PNP && ISA
> 

Perhaps. But it doesn't work. 

-Andi


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