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    Subject[PATCH 4.1 038/102] PCI: Fix TI816X class code quirk
    Date
    4.1-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Bjorn Helgaas <bhelgaas@google.com>

    commit d1541dc977d376406f4584d8eb055488655c98ec upstream.

    In fixup_ti816x_class(), we assigned "class = PCI_CLASS_MULTIMEDIA_VIDEO".
    But PCI_CLASS_MULTIMEDIA_VIDEO is only the two-byte base class/sub-class
    and needs to be shifted to make space for the low-order interface byte.

    Shift PCI_CLASS_MULTIMEDIA_VIDEO to set the correct class code.

    Fixes: 63c4408074cb ("PCI: Add quirk for setting valid class for TI816X Endpoint")
    Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
    CC: Hemant Pedanekar <hemantp@ti.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/pci/quirks.c | 9 ++++++---
    1 file changed, 6 insertions(+), 3 deletions(-)

    --- a/drivers/pci/quirks.c
    +++ b/drivers/pci/quirks.c
    @@ -2838,12 +2838,15 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_IN

    static void fixup_ti816x_class(struct pci_dev *dev)
    {
    + u32 class = dev->class;
    +
    /* TI 816x devices do not have class code set when in PCIe boot mode */
    - dev_info(&dev->dev, "Setting PCI class for 816x PCIe device\n");
    - dev->class = PCI_CLASS_MULTIMEDIA_VIDEO;
    + dev->class = PCI_CLASS_MULTIMEDIA_VIDEO << 8;
    + dev_info(&dev->dev, "PCI class overridden (%#08x -> %#08x)\n",
    + class, dev->class);
    }
    DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_TI, 0xb800,
    - PCI_CLASS_NOT_DEFINED, 0, fixup_ti816x_class);
    + PCI_CLASS_NOT_DEFINED, 0, fixup_ti816x_class);

    /* Some PCIe devices do not work reliably with the claimed maximum
    * payload size supported.



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