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Message-Id: <1465321121-22238-8-git-send-email-peter.griffin@linaro.org> Date: Tue, 7 Jun 2016 18:38:40 +0100 From: Peter Griffin <peter.griffin@...aro.org> To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, kernel@...inux.com, vinod.koul@...el.com, linus.walleij@...aro.org, dan.j.williams@...el.com, leoli@...escale.com, zw@...kernel.org, baohua@...nel.org, maxime.ripard@...e-electrons.com, wens@...e.org, ldewangan@...dia.com, jonathanh@...dia.com, swarren@...dotorg.org, thierry.reding@...il.com, gnurou@...il.com Cc: peter.griffin@...aro.org, lee.jones@...aro.org, dmaengine@...r.kernel.org, linux-tegra@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org Subject: [PATCH 7/8] dmaengine: tegra20-apb-dma: 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@...aro.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
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