X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Facpi%2Fpci_irq.c;h=62010c2481b3614b9b9ddd3e1cbbae2118f40fd7;hb=444ad82bc3eaa554be40d22dc248e58aeefd54d9;hp=dd3186abe07a9c464df616aae6fb05454fb53085;hpb=733abe4fff3afa13e301bc8bc5bee9aac4b59fdc;p=linux-2.6

diff --git a/drivers/acpi/pci_irq.c b/drivers/acpi/pci_irq.c
index dd3186abe0..62010c2481 100644
--- 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.