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dmaengine: ste_dma40: Only calculate residue if txstate exists. 

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>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Peter Griffin 2016-06-07 18:38:38 +01:00 committed by Vinod Koul
parent e841b80f45
commit a90e56e5b1
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/ste_dma40.c
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@ -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))