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    Subject[PATCH 4.9 069/105] dmaengine: ioatdma: workaround SKX ioatdma version
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

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

    From: Dave Jiang <dave.jiang@intel.com>


    [ Upstream commit 34a31f0af84158955a9747fb5c6712da5bbb5331 ]

    The Skylake ioatdma is technically CBDMA 3.2+ and contains the same hardware
    bits with some additional 3.3 features, but it's not really 3.3 where the
    driver is concerned.

    Signed-off-by: Dave Jiang <dave.jiang@intel.com>
    Signed-off-by: Vinod Koul <vinod.koul@intel.com>
    Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/dma/ioat/init.c | 2 ++
    1 file changed, 2 insertions(+)

    --- a/drivers/dma/ioat/init.c
    +++ b/drivers/dma/ioat/init.c
    @@ -1357,6 +1357,8 @@ static int ioat_pci_probe(struct pci_dev

    device->version = readb(device->reg_base + IOAT_VER_OFFSET);
    if (device->version >= IOAT_VER_3_0) {
    + if (is_skx_ioat(pdev))
    + device->version = IOAT_VER_3_2;
    err = ioat3_dma_probe(device, ioat_dca_enabled);

    if (device->version >= IOAT_VER_3_3)

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