Messages in this thread | | | Date | Sun, 3 Sep 2006 17:58:41 -0700 | From | Andrew Morton <> | Subject | Re: VIA IRQ quirk fixup only in XT-PIC mode Take 3 |
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On Mon, 04 Sep 2006 01:42:47 +0100 Sergio Monteiro Basto <sergio@sergiomb.no-ip.org> wrote:
> Hi, this patch (now for 2.6.18-rc5). > > > I found, on my new VIA with IO-APIC working well, that quirks aren't > good/needed. > After, I found this interesting email http://lkml.org/lkml/2005/8/13/30 > by Karsten Wiese, after, Alan Cox writes this > http://lkml.org/lkml/2005/8/16/160 (on same thread) and Karsten Wiese > end ups with the solution on http://lkml.org/lkml/2005/8/18/92, which I > want try to implement. > I have 2 VIAs with almost same IDs (others reporters have > with exactly the same IDs) and in ones I need the quirks and in others > don't, because one don't have APIC enabled, the other have it !?! > > we have other reported of the same problem > http://lkml.org/lkml/2006/7/30/59 > and > http://lkml.org/lkml/2006/9/1/106 > > Checking my emails that I send to Len Brown on May of 2005 about this > subject. I found, what I want, is just revert one patch of Bjorn > Helgaas, between kernel 2.6.12-rc5 and 6.14. > Check this out > http://sourceforge.net/mailarchive/message.php?msg_id=11858102 > > To finish I want put clear, the great work of Bjorn Helgaas which have > made all of this, but at the end, I suspect with one false positive > report introduce this regression, that I hopefully found. >
This thing is getting embarrassing.
> diff linux-2.6.17.x86_64/drivers/pci/quirks.c.orig linux-2.6.17.x86_64/drivers/pci/quirks.c -up > --- linux-2.6.17.x86_64/drivers/pci/quirks.c.orig 2006-09-04 01:37:09.000000000 +0100 > +++ linux-2.6.17.x86_64/drivers/pci/quirks.c 2006-09-04 01:40:16.000000000 +0100 > @@ -654,22 +654,24 @@ static void quirk_via_irq(struct pci_dev > { > u8 irq, new_irq; > > +#ifdef CONFIG_X86_IO_APIC > + if (nr_ioapics && !skip_ioapic_setup) > + return; > +#endif > +#ifdef CONFIG_ACPI > + if (acpi_irq_model != ACPI_IRQ_MODEL_PIC) > + return; > +#endif > new_irq = dev->irq & 0xf; > pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq); > if (new_irq != irq) { > - printk(KERN_INFO "PCI: VIA IRQ fixup for %s, from %d to %d\n", > + printk(KERN_INFO "PCI: VIA PIC IRQ fixup for %s, from %d to %d\n", > pci_name(dev), irq, new_irq); > udelay(15); /* unknown if delay really needed */ > 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 >
There's a similar patch in -mm: pci-quirk_via_irq-behaviour-change.patch. Does that work for you?
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