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

Message ID 1465321121-22238-7-git-send-email-peter.griffin@linaro.org
State Accepted
Commit b9ab9d10d9898cd022fece44a474e5ddb785d639
Headers show

Commit Message

Peter Griffin June 7, 2016, 5:38 p.m. UTC 
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(-)

-- 
1.9.1
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Patch

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);