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

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>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index b0a71ecee682..e4804fb05e23 100644
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -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;