From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f53.google.com (mail-wm0-f53.google.com [74.125.82.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3rPJjm5XqvzDq64 for ; Wed, 8 Jun 2016 03:39:56 +1000 (AEST) Received: by mail-wm0-f53.google.com with SMTP id m124so124423080wme.1 for ; Tue, 07 Jun 2016 10:39:56 -0700 (PDT) From: Peter Griffin To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@stlinux.com, vinod.koul@intel.com, linus.walleij@linaro.org, dan.j.williams@intel.com, leoli@freescale.com, zw@zh-kernel.org, baohua@kernel.org, maxime.ripard@free-electrons.com, wens@csie.org, ldewangan@nvidia.com, jonathanh@nvidia.com, swarren@wwwdotorg.org, thierry.reding@gmail.com, gnurou@gmail.com Cc: peter.griffin@linaro.org, lee.jones@linaro.org, dmaengine@vger.kernel.org, linux-tegra@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH 5/8] dmaengine: ste_dma40: Only calculate residue if txstate exists. Date: Tue, 7 Jun 2016 18:38:38 +0100 Message-Id: <1465321121-22238-6-git-send-email-peter.griffin@linaro.org> In-Reply-To: <1465321121-22238-1-git-send-email-peter.griffin@linaro.org> References: <1465321121-22238-1-git-send-email-peter.griffin@linaro.org> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , There is no point calculating the residue if there is no txstate to store the value. Signed-off-by: Peter Griffin --- drivers/dma/ste_dma40.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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 @@ static enum dma_status d40_tx_status(struct dma_chan *chan, } 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)) -- 1.9.1