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dmaengine: sun6i-dma: Only calculate residue if state exists.

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There is no point in calculating the residue if state does not
exist to store the value.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Peter Griffin 2016-06-07 18:38:39 +01:00 • committed by Vinod Koul
parent a90e56e5b1
commit b9ab9d10d9
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/sun6i-dma.c
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@ -865,7 +865,7 @@ static enum dma_status sun6i_dma_tx_status(struct dma_chan *chan,
size_t bytes = 0;
ret = dma_cookie_status(chan, cookie, state);
if (ret == DMA_COMPLETE)
if (ret == DMA_COMPLETE || !state)
return ret;
spin_lock_irqsave(&vchan->vc.lock, flags);