Messages in this thread | | | Date | Tue, 5 Jul 2005 14:20:59 -0700 | From | Chris Wright <> | Subject | Re: [stable] Re: If ACPI doesn't find an irq listed, don't accept 0 as a valid PCI irq. |
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* Alexander Nyberg (alexn@telia.com) wrote: > > tree e6a38b3d6bf434f08054562113bb660c4227769f > > parent 4a89a04f1ee21a7c1f4413f1ad7dcfac50ff9b63 > > author Linus Torvalds <torvalds@g5.osdl.org> Sun, 03 Jul 2005 00:35:33 -0700 > > committer Linus Torvalds <torvalds@g5.osdl.org> Sun, 03 Jul 2005 00:35:33 -0700 > > > > If ACPI doesn't find an irq listed, don't accept 0 as a valid PCI irq. > > > > That zero just means that nothing else found any irq information either. > > > > drivers/acpi/pci_irq.c | 2 +- > > 1 files changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c > > --- a/drivers/acpi/pci_irq.c > > +++ b/drivers/acpi/pci_irq.c > > @@ -433,7 +433,7 @@ acpi_pci_irq_enable ( > > printk(KERN_WARNING PREFIX "PCI Interrupt %s[%c]: no GSI", > > pci_name(dev), ('A' + pin)); > > /* Interrupt Line values above 0xF are forbidden */ > > - if (dev->irq >= 0 && (dev->irq <= 0xF)) { > > + if (dev->irq > 0 && (dev->irq <= 0xF)) { > > printk(" - using IRQ %d\n", dev->irq); > > acpi_register_gsi(dev->irq, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW); > > return_VALUE(0); > > Could this go into stable please? I've got it confirmed it fixes: > http://bugme.osdl.org/show_bug.cgi?id=4824 > > Which was introduced in -stable 2.6.12.2.
Thanks Alex, I've had bug reports from this one too (which that patch does fix). PCI irq routing is so damn touchy and easy to break, I rather hate mucking with it in -stable. But, unless Linus sees a reason not to include this one, it does appear to fix real problems.
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