PCI: pcie: Ensure hotplug ports have a minimum number of resources

[safe/jmp/linux-2.6] / drivers / pci / setup-irq.c

diff --git a/drivers/pci/setup-irq.c b/drivers/pci/setup-irq.c
index a251289..aa795fd 100644 (file)
--- a/drivers/pci/setup-irq.c
+++ b/drivers/pci/setup-irq.c
@@ -24,7 +24,7 @@ pdev_fixup_irq(struct pci_dev *dev,
               int (*map_irq)(struct pci_dev *, u8, u8))
 {
        u8 pin, slot;
-       int irq;
+       int irq = 0;
 
        /* If this device is not on the primary bus, we need to figure out
           which interrupt pin it will come in on.   We know which slot it
@@ -33,20 +33,21 @@ pdev_fixup_irq(struct pci_dev *dev,
           apply the swizzle function.  */
 
        pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
-       /* Cope with 0 and illegal. */
-       if (pin == 0 || pin > 4)
+       /* Cope with illegal. */
+       if (pin > 4)
                pin = 1;
 
-       /* Follow the chain of bridges, swizzling as we go.  */
-       slot = (*swizzle)(dev, &pin);
+       if (pin != 0) {
+               /* Follow the chain of bridges, swizzling as we go.  */
+               slot = (*swizzle)(dev, &pin);
 
-       irq = (*map_irq)(dev, slot, pin);
-       if (irq == -1)
-               irq = 0;
+               irq = (*map_irq)(dev, slot, pin);
+               if (irq == -1)
+                       irq = 0;
+       }
        dev->irq = irq;
 
-       pr_debug("PCI: fixup irq: (%s) got %d\n",
-               dev->dev.kobj.name, dev->irq);
+       dev_dbg(&dev->dev, "fixup irq: got %d\n", dev->irq);
 
        /* Always tell the device, so the driver knows what is
           the real IRQ to use; the device does not use it. */