dmaengine: ste_dma40: Only calculate residue if txstate exists.
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>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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 @@
}
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))