x86: remove bogus 'pci=usepirqmask' suggestion when no irq is defined

This was harmless, but for the case of a device that had no irq
pre-defined we would incorrectly suggest that "usepirqmask" might make a
difference.  It never would, and the message was just confusing people.

Reported in the dmesg of Etienne Lorrain.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/i386/pci/irq.c b/arch/i386/pci/irq.c
index 19e6f48..ee8e016 100644 (file)
--- a/arch/i386/pci/irq.c
+++ b/arch/i386/pci/irq.c
@@ -846,7 +846,7 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign)
         * reported by the device if possible.
         */
        newirq = dev->irq;
-       if (!((1 << newirq) & mask)) {
+       if (newirq && !((1 << newirq) & mask)) {
                if ( pci_probe & PCI_USE_PIRQ_MASK) newirq = 0;
                else printk(KERN_WARNING "PCI: IRQ %i for device %s doesn't match PIRQ mask - try pci=usepirqmask\n", newirq, pci_name(dev));
        }