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    Subject[PATCH 5/6] dmaengine/dw_dmac: set residue as total len in dwc_tx_status if status is !DMA_SUCCESS
    Date
    If transfer status is !=DMA_SUCCESS, return total transfer len as residue,
    instead of zero.

    Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
    ---
    drivers/dma/dw_dmac.c | 6 +++++-
    1 files changed, 5 insertions(+), 1 deletions(-)

    diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
    index 9d8ed35..92f4cb0 100644
    --- a/drivers/dma/dw_dmac.c
    +++ b/drivers/dma/dw_dmac.c
    @@ -870,7 +870,11 @@ dwc_tx_status(struct dma_chan *chan,
    ret = dma_async_is_complete(cookie, last_complete, last_used);
    }

    - dma_set_tx_state(txstate, last_complete, last_used, 0);
    + if (ret != DMA_SUCCESS)
    + dma_set_tx_state(txstate, last_complete, last_used,
    + dwc_first_active(dwc)->len);
    + else
    + dma_set_tx_state(txstate, last_complete, last_used, 0);

    return ret;
    }
    --
    1.7.2.2


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