[ACPI] No IRQ known... - using IRQ 255 (Bjarni Rúnar Einarsson)

http://bugzilla.kernel.org/show_bug.cgi?id=2148

drivers/acpi/pci_irq.c

@@ -368,7 +368,7 @@ acpi_pci_irq_enable (
 	if (!irq) {
 		printk(KERN_WARNING PREFIX "No IRQ known for interrupt pin %c of device %s", ('A' + pin), pci_name(dev));
 		/* Interrupt Line values above 0xF are forbidden */
-		if (dev->irq && dev->irq >= 0xF) {
+		if (dev->irq && (dev->irq <= 0xF)) {
 			printk(" - using IRQ %d\n", dev->irq);
 			return_VALUE(dev->irq);
 		}