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    Subject[PATCH v3 03/15] PCI: quirk dma_func_alias for Ricoh devices
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    The existing quirk for these devices doesn't really solve the problem,
    re-implement it using the DMA alias iterator. We'll come back later
    and remove the existing quirk and dma_source interface. Note that
    device ID 0xe822 is typically function 0 and 0xe230 has been tested
    to not need the quirk and are therefore removed versus the equivalent
    dma_source quirk. If the exist in other configurations we can re-add
    them.

    Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
    ---
    drivers/pci/quirks.c | 14 ++++++++++++++
    1 file changed, 14 insertions(+)

    diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
    index e729206..ea2cb9f 100644
    --- a/drivers/pci/quirks.c
    +++ b/drivers/pci/quirks.c
    @@ -3333,6 +3333,20 @@ int pci_dev_specific_reset(struct pci_dev *dev, int probe)
    return -ENOTTY;
    }

    +static void quirk_dma_func0_alias(struct pci_dev *dev)
    +{
    + if (PCI_FUNC(dev->devfn) != 0)
    + dev->dma_func_alias |= (1 << 0);
    +}
    +
    +/*
    + * https://bugzilla.redhat.com/show_bug.cgi?id=605888
    + *
    + * Some Ricoh devices use function 0 as the PCIe requester ID for DMA.
    + */
    +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_RICOH, 0xe832, quirk_dma_func0_alias);
    +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_RICOH, 0xe476, quirk_dma_func0_alias);
    +
    static struct pci_dev *pci_func_0_dma_source(struct pci_dev *dev)
    {
    if (!PCI_FUNC(dev->devfn))


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