Re: how I know if a interrupt is ioapic_edge_type or ioapic_level_type? [Was Re: [Fwd: Re: [Linux-usb-users] Fwd: Re: 2.6.17-rc6-mm2 - USB issues]]

[Sergio Monteiro Basto <sergio@sergiomb.no-ip.org>]

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On Thu, 2006-06-22 at 15:54 -0700, Chris Wedgwood wrote:
> On Thu, Jun 22, 2006 at 11:46:38PM +0100, Sergio Monteiro Basto wrote:
> 
> > yap, in my opinion this function should back to
> 
> > +DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_ANY_ID, quirk_via_irq);
> 
> 
> this is *obviousyl* wrong, it should never have been merged like that
> and there are reports and complaints this causes problems for some
> people
>

It was like that in kernel 2.6.16 and previous since, I don't know,
2.6.9 or 2.6.13 ....

> 
> we should first attempt to get all the IDs (some are clearly missing
> still, patch coming up to address that) and where that fails perhaps
> have a kernel command-line parameter to be overly aggressive as a
> stop-gap until we van figure out the proper solution

I believe this quirks is just for VIA system with interrupts in XT-PIC
mode (like my old laptop).
> 
> i'd also like to figure out why the quirk is needed/fails when people
> are using ACPI for interrupt routing as presumbly that must work as
> windows relies on it

yes, this is other mysterious, why boot with acpi=noirq could be one
workaround. But could be other problem more related with usb drives.


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