Re: Re: ACPI ignoring IRQ flags in PRT

[Andrew de Quincey <adq_dvb-fmPXVN3awWJAJAzL26g0SA@public.gmane.org>]

> Great to see someone's digging into this. BTW have you looked at the
> ACPI 2.0 spec section 6.2.8? It talks about the contents of _PRT.
> Basically, it can contain either the interrupt number itself OR point to
> a link device, which in turn lets ACPI read (via _CRS) write (via _SRS)
> and see the possiblities (_BRS) for controlling the interrupt routing
> for that device.
>
> The code *should* be handling both these cases, but obviously there are
> still some bugs lurking.

I think its handling both cases OK, its just that it was ignoring the polarity 
and mode settings for link device IRQs.

What I was wondering was if/where these settings were for global IRQs... i.e. 
when the _PRT contains the actual interrupt number, what settings should be 
used.

I suppose since its the PCI routing table, it might just expect you to default 
to PCI settings, but as I found link-device IRQs specified in the PRT don't 
necessary follow the PCI standard... problem is, my board doesn't specify 'em 
in this way.



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