In the case where a (broken) BIOS gives  us a blank _CRS for
a PCI Interrupt Link Device, the acpi_walk_resources()
will not terminate, but will then give the callback
the resource end tag.  Ignore the end tag.
Signed-off-by: Len Brown <len.brown@intel.com>
                        *irq = p->interrupts[0];
                        break;
                }
+               break;
        default:
-               ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Resource isn't an IRQ\n"));
+               ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Resource %d isn't an IRQ\n", resource->type));
+       case ACPI_RESOURCE_TYPE_END_TAG:
                return_ACPI_STATUS(AE_OK);
        }
        return_ACPI_STATUS(AE_CTRL_TERMINATE);