[PATCH 6/8] dmaengine: sun6i-dma: Only calculate residue if state exists.

Peter Griffin
2016-06-07T17:38:39Z

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>
---
drivers/dma/sun6i-dma.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index 5065ca4..3835fcd 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -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);
--
1.9.1