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    Subject[PATCH 4.18 224/235] staging: fsl-dpaa2/eth: Fix DMA mapping direction
    Date
    4.18-stable review patch.  If anyone has any objections, please let me know.

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

    From: Ioana Radulescu <ruxandra.radulescu@nxp.com>

    [ Upstream commit 466bcdc1fa303be175c45d054bb00effc575033a ]

    We are using DMA_FROM_DEVICE when mapping RX frame buffers,
    but DMA_BIDIRECTIONAL for unmap. Fix the direction for DMA
    unmapping operation.

    Fixes: 87eb55e418b7 ("staging: fsl-dpaa2/eth: Fix potential endless loop")

    Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
    +++ b/drivers/staging/fsl-dpaa2/ethernet/dpaa2-eth.c
    @@ -767,7 +767,7 @@ static void free_bufs(struct dpaa2_eth_p
    for (i = 0; i < count; i++) {
    vaddr = dpaa2_iova_to_virt(priv->iommu_domain, buf_array[i]);
    dma_unmap_single(dev, buf_array[i], DPAA2_ETH_RX_BUF_SIZE,
    - DMA_BIDIRECTIONAL);
    + DMA_FROM_DEVICE);
    skb_free_frag(vaddr);
    }
    }

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