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x86, acpi/irq: pci device dev->irq is an isa irq not a gsi

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Strictly speaking on x86 (where acpi is used) dev->irq must be
a dual i8259 irq input aka an isa irq.  Therefore we should translate
that isa irq into a gsi before passing it to a function that
takes a gsi.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
LKML-Reference: <1269936436-7039-3-git-send-email-ebiederm@xmission.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Eric W. Biederman 2010-03-30 01:07:04 -07:00 committed by H. Peter Anvin
parent 9a0a91bb56
commit 414d3448db
1 changed files with 5 additions and 3 deletions
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8
drivers/acpi/pci_irq.c
View file

@ -401,11 +401,13 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
* driver reported one, then use it. Exit in any case.
*/
if (gsi < 0) {
u32 dev_gsi;
dev_warn(&dev->dev, "PCI INT %c: no GSI", pin_name(pin));
/* Interrupt Line values above 0xF are forbidden */
if (dev->irq > 0 && (dev->irq <= 0xF)) {
printk(" - using IRQ %d\n", dev->irq);
acpi_register_gsi(&dev->dev, dev->irq,
if (dev->irq > 0 && (dev->irq <= 0xF) &&
(acpi_isa_irq_to_gsi(dev->irq, &dev_gsi) == 0)) {
printk(" - using ISA IRQ %d\n", dev->irq);
acpi_register_gsi(&dev->dev, dev_gsi,
ACPI_LEVEL_SENSITIVE,
ACPI_ACTIVE_LOW);
return 0;