[PATCH 5/8] dmaengine: ste_dma40: Only calculate residue if txstate exists.

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

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>
---
drivers/dma/ste_dma40.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 6fb8307..378cc47 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -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))
--
1.9.1