dmaengine: sun6i-dma: Only calculate residue if state exists.
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>
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 @@
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);