[PATCH] parport_pc.c PnP BIOS sanity check

[Thomas Hood]

The following would seem to be required to protect against
the case in which PnP BIOS reports an IRQ of 0 for a 
parport with disabled IRQ.      // Thomas  jdthood_AT_yahoo.co.uk

--- linux-2.4.7-ac2/drivers/parport/parport_pc.c        Mon Jul 30 01:18:34 2001
+++ linux-2.4.7-ac2-jdth1/drivers/parport/parport_pc.c  Mon Jul 30 12:32:16 2001
@@ -2797,7 +2797,8 @@
        irq=dev->irq_resource[0].start;
        dma=dev->dma_resource[0].start;

-       if(dma==0) dma=-1;
+       if (dma==0) dma=PARPORT_DMA_NONE;
+       if (irq==0) irq=PARPORT_IRQ_NONE;

        printk(KERN_INFO "PnPBIOS: Parport found %s %s at io=%04x,%04x irq=%d dma=%d\n",
                dev->name,dev->slot_name,io,iohi,irq,dma);