ACPI: Altix: ACPI _PRT support

Provide ACPI _PRT support for SN Altix systems.

The SN Altix platform does not conform to the
IOSAPIC IRQ routing model, so a new acpi_irq_model
(ACPI_IRQ_MODEL_PLATFORM) has been defined. The SN
platform specific code sets acpi_irq_model to
this new value, and keys off of it in acpi_register_gsi()
to avoid the iosapic code path.

Signed-off-by: John Keller <jpk@sgi.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 279c4bac92e5..766332e45592 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -561,6 +561,9 @@ static int __init acpi_bus_init_irq(void)
         case ACPI_IRQ_MODEL_IOSAPIC:
                 message = "IOSAPIC";
                 break;
+        case ACPI_IRQ_MODEL_PLATFORM:
+                message = "platform specific model";
+                break;
         default:
                 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
                 return -ENODEV;