[PATCH 3/8] dmaengine: coh901318: Only calculate residue if txstate exists.

Peter Griffin
2016-06-07T17:38:36Z

There is no point in calculating the residue if there is no
txstate to store the value.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
---
drivers/dma/coh901318.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index c340ca9..c100616 100644
--- a/drivers/dma/coh901318.c
+++ b/drivers/dma/coh901318.c
@@ -2422,7 +2422,7 @@ coh901318_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
enum dma_status ret;

ret = dma_cookie_status(chan, cookie, txstate);
- if (ret == DMA_COMPLETE)
+ if (ret == DMA_COMPLETE || !txstate)
return ret;

dma_set_residue(txstate, coh901318_get_bytes_left(chan));
--
1.9.1