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authorPeter Griffin <peter.griffin@linaro.org>2016-06-07 19:38:36 +0200
committerVinod Koul <vinod.koul@intel.com>2016-06-21 18:05:00 +0200
commit95b0aa3e10b08b9ee20b5f5e19d162d049744a9b (patch)
treef5afdc01c602a01f124189c671047b3acc3a44f2 /drivers/dma/coh901318.c
parentdmaengine: fsl-edma: print error code in error messages. (diff)
downloadlinux-95b0aa3e10b08b9ee20b5f5e19d162d049744a9b.tar.xz
linux-95b0aa3e10b08b9ee20b5f5e19d162d049744a9b.zip
dmaengine: coh901318: Only calculate residue if txstate exists.
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> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/coh901318.c')
-rw-r--r--drivers/dma/coh901318.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
index c340ca9bd2b5..c1006165cea8 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));