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    Subject[PATCH] PCI: Add ACS support for AMD A88X southbridge devices
    Date
    AMD has confirmed that peer-to-peer between two southbridge functions
    does not occur.

    Joel Schopp at https://bugzilla.kernel.org/show_bug.cgi?id=81841#c15
    > +-14.4-[01]----05.0 Dialogic Corporation PRI
    > The legacy PCI should be isolated from the other devices identified.
    > Not sure what is going on here.
    >
    > +-14.5 Advanced Micro Devices, Inc. [AMD] FCH USB OHCI Controller
    > This OHCI Controller should also be isolated from the other devices.

    Signed-off-by: Marti Raudsepp <marti@juffo.org>
    ---
    drivers/pci/quirks.c | 7 +++++++
    1 file changed, 7 insertions(+)

    diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
    index 80c2d01..ce43316 100644
    --- a/drivers/pci/quirks.c
    +++ b/drivers/pci/quirks.c
    @@ -3582,6 +3582,11 @@ struct pci_dev *pci_get_dma_source(struct pci_dev *dev)
    * 1002:439d SB7x0/SB8x0/SB9x0 LPC host controller
    * 1002:4384 SBx00 PCI to PCI Bridge
    * 1002:4399 SB7x0/SB8x0/SB9x0 USB OHCI2 Controller
    + *
    + * https://bugzilla.kernel.org/show_bug.cgi?id=81841#c15
    + *
    + * 1022:780f [AMD] FCH PCI Bridge
    + * 1022:7809 [AMD] FCH USB OHCI Controller
    */
    static int pci_quirk_amd_sb_acs(struct pci_dev *dev, u16 acs_flags)
    {
    @@ -3675,6 +3680,8 @@ static const struct pci_dev_acs_enabled {
    { PCI_VENDOR_ID_ATI, 0x439d, pci_quirk_amd_sb_acs },
    { PCI_VENDOR_ID_ATI, 0x4384, pci_quirk_amd_sb_acs },
    { PCI_VENDOR_ID_ATI, 0x4399, pci_quirk_amd_sb_acs },
    + { PCI_VENDOR_ID_AMD, 0x780f, pci_quirk_amd_sb_acs },
    + { PCI_VENDOR_ID_AMD, 0x7809, pci_quirk_amd_sb_acs },
    { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, pci_quirk_intel_pch_acs },
    { 0 }
    };
    --
    2.1.1


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