Bjorn Helgaas <bjorn.helgaas@xxxxxx> wrote:
> +/**
> + * pci_swizzle_interrupt_pin - swizzle INTx for device behind bridge
> + * @dev: the PCI device
> + * @pin: the INTx pin (1=INTA, 2=INTB, 3=INTD, 4=INTD)
> + *
> + * The PCI-to-PCI bridge specification requires INTx swizzling for
> + * devices behind bridges on add-in cards. This performs the swizzle
> + * for one level of bridge.
> + */
Better.
> +u8 pci_swizzle_interrupt_pin(struct pci_dev *dev, u8 pin)
> +{
> + /* This implements Table 9-1 of the PCI-to-PCI bridge spec */
I'd recommend merging this comment into the banner.
> + return (((pin - 1) + PCI_SLOT(dev->devfn)) % 4) + 1;
> +}
> +
David
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