ACPI : Not register gsi for PCI IDE controller in legacy mode

[safe/jmp/linux-2.6] / drivers / acpi / pci_irq.c

diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index dd3186a..62010c2 100644 (file)
--- a/drivers/acpi/pci_irq.c
+++ b/drivers/acpi/pci_irq.c
@@ -429,6 +429,15 @@ int acpi_pci_irq_enable(struct pci_dev *dev)
                                          &polarity, &link,
                                          acpi_pci_allocate_irq);
 
+       if (irq < 0) {
+               /*
+                * IDE legacy mode controller IRQs are magic. Why do compat
+                * extensions always make such a nasty mess.
+                */
+               if (dev->class >> 8 == PCI_CLASS_STORAGE_IDE &&
+                               (dev->class & 0x05) == 0)
+                       return 0;
+       }
        /*
         * No IRQ known to the ACPI subsystem - maybe the BIOS / 
         * driver reported one, then use it. Exit in any case.