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Subject: Re: /proc/pci deprecation?
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Richard Henderson <rth@twiddle.net>, Patrick Mochel <mochel@osdl.org>,
       Willy Tarreau <willy@w.ods.org>, Petr Vandrovec <VANDROVE@vc.cvut.cz>,
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On Mon, 2002-12-09 at 01:54, Linus Torvalds wrote:
>  - we should _never_ update the PCI_INTERRUPT_LINE register, because it
>    destroys boot loader information (the same way we need to not overwrite
>    BIOS extended areas and ACPI areas etc in order to be able to reboot
>    cleanly)

I wonder if this is why we have all these problems with VIA chipset
interrupt handling. According to VIA docs they _do_ use
PCI_INTERRUPT_LINE on integrated devices to select the IRQ routing
between APIC and PCI/ISA etc, as well as 0 meaning "IRQ disabled"

Alan

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