Re: [PATCH] VIA IRQ quirk fixup only in XT_PIC mode Take 2

[Daniel Drake <dsd@gentoo.org>]

Sergio Monteiro Basto wrote:
> Hi, this patch (now for 2.6.18-rc2) is more readable.

Ok, it looks like I was wrong in my earlier mails, ACPI vs APIC 
confusion. In the bug reports I mentioned, APIC was not being used in 
any circumstances (however it is still a bit strange how these systems 
do not need quirks when acpi=off).

I'm reasonably certain that this patch will apply the quirks on the 
affected systems again, so I'm happy for it to be applied, people will 
be able to use their hardware again. However I'm not sure how good a 
solution it is, because in some circumstances it will apply the quirks 
to VIA PCI cards on non-VIA boards, which was the reason we messed with 
this code in the first place. We could possibly merge it with the 
southbridge detection hack, but it gets a bit silly at that point...

Jeff/Chris: any thoughts?

> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
> Cc: "Scott J. Harmon" <harmon@ksu.edu>
> Cc: Andrew Morton <akpm@osdl.org>
> Cc: Chris Wedgwood <cw@f00f.org>
> Cc: Greg KH <greg@kroah.com>
> Signed-off-by: Sergio Monteiro Basto <sergio@sergiomb.no-ip.org>
> ---
>  quirks.c |   14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
>
> --- linux-2.6.17.i686/drivers/pci/quirks.c.orig	2006-07-28 12:59:04.000000000 +0100
> +++ linux-2.6.17.i686/drivers/pci/quirks.c	2006-07-28 13:26:49.000000000 +0100
> @@ -648,11 +648,17 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_V
>   *
>   * Some of the on-chip devices are actually '586 devices' so they are
>   * listed here.
> + * 
> + * if flags say that we have working apic(s), we don't need to quirk these
> + * devices
>   */
>  static void quirk_via_irq(struct pci_dev *dev)
>  {
>  	u8 irq, new_irq;
>  
> +	if ((smp_found_config && !skip_ioapic_setup && nr_ioapics) || cpu_has_apic)
> +		return;
> +
>  	new_irq = dev->irq & 0xf;
>  	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
>  	if (new_irq != irq) {
> @@ -662,13 +668,7 @@ static void quirk_via_irq(struct pci_dev
>  		pci_write_config_byte(dev, PCI_INTERRUPT_LINE, new_irq);
>  	}
>  }
> -DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_0, quirk_via_irq);
> -DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1, quirk_via_irq);
> -DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_2, quirk_via_irq);
> -DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_3, quirk_via_irq);
> -DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686, quirk_via_irq);
> -DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_4, quirk_via_irq);
> -DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C686_5, quirk_via_irq);
> +DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_VIA, PCI_ANY_ID, quirk_via_irq);
>  
>  /*
>   * VIA VT82C598 has its device ID settable and many BIOSes

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