From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756075AbcFGRiz (ORCPT ); Tue, 7 Jun 2016 13:38:55 -0400 Received: from mail-wm0-f54.google.com ([74.125.82.54]:37646 "EHLO mail-wm0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756053AbcFGRiw (ORCPT ); Tue, 7 Jun 2016 13:38:52 -0400 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 3/8] dmaengine: coh901318: Only calculate residue if txstate exists. Date: Tue, 7 Jun 2016 18:38:36 +0100 Message-Id: <1465321121-22238-4-git-send-email-peter.griffin@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1465321121-22238-1-git-send-email-peter.griffin@linaro.org> References: <1465321121-22238-1-git-send-email-peter.griffin@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org There is no point in calculating the residue if there is no txstate to store the value. Signed-off-by: Peter Griffin --- drivers/dma/coh901318.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c index c340ca9..c100616 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)); -- 1.9.1