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    Subject[PATCH 5/8] dmaengine: ste_dma40: Only calculate residue if txstate exists.
    Date
    There is no point calculating the residue if there is
    no txstate to store the value.

    Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
    ---
    drivers/dma/ste_dma40.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
    index 6fb8307..378cc47 100644
    --- a/drivers/dma/ste_dma40.c
    +++ b/drivers/dma/ste_dma40.c
    @@ -2588,7 +2588,7 @@ static enum dma_status d40_tx_status(struct dma_chan *chan,
    }

    ret = dma_cookie_status(chan, cookie, txstate);
    - if (ret != DMA_COMPLETE)
    + if (ret != DMA_COMPLETE && txstate)
    dma_set_residue(txstate, stedma40_residue(chan));

    if (d40_is_paused(d40c))
    --
    1.9.1
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