Messages in this thread | | | Date | Fri, 09 Mar 2001 20:42:36 -0500 | From | Thomas Hood <> | Subject | 2.4.2-ac16 PIIX4 ACPI getting wrong IRQ? |
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With 2.4.3-pre1, /proc/pci contained: > Bus 0, device 7, function 3: > Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 1).
With 2.4.2-ac16, /proc/pci contains: > Bus 0, device 7, function 3: > Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev 1). > IRQ 9.
So the ACPI function of the PIIX4 is now being given IRQ 9. I don't want this. I was using IRQ 9 for a PCMCIA device.
So I tried booting the kernel with "acpi=off" and "pci=irqmask=0x0800", but the result was the same.
Documentation/kernel-parameters.txt says that "pci=irqmask=0xMMMM ... sets a bit mask of IRQs allowed to be assigned". This parameter is being ignored.
[... searches through kernel sources ...]
Well I see that this is the result of a change to /usr/src/linux-2.4.2-ac16/arch/i386/kernel/pci_pc.c which looks deliberate:
< static void __init pci_fixup_piix4_acpi(struct pci_dev *d) < { < /* < * PIIX4 ACPI device: hardwired IRQ9 < */ < d->irq = 9; < }
What's going on?
Thomas Hood jdthood_AT_yahoo.co.uk - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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