[PATCH 7/8] dmaengine: tegra20-apb-dma: Only calculate residue if txstate exists.
From: peter.griffin@linaro.org (Peter Griffin)
Date: 2016-06-07 17:40:42
Also in:
linux-tegra, linuxppc-dev, lkml
Subsystem:
dma generic offload engine subsystem, tegra dma drivers, the rest · Maintainers:
Vinod Koul, Laxman Dewangan, Jon Hunter, Linus Torvalds
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/tegra20-apb-dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c
index 01e316f..7f4af8c 100644
--- a/drivers/dma/tegra20-apb-dma.c
+++ b/drivers/dma/tegra20-apb-dma.c@@ -814,7 +814,7 @@ static enum dma_status tegra_dma_tx_status(struct dma_chan *dc, unsigned int residual; ret = dma_cookie_status(dc, cookie, txstate); - if (ret == DMA_COMPLETE) + if (ret == DMA_COMPLETE || !txstate) return ret; spin_lock_irqsave(&tdc->lock, flags);
--
1.9.1