From mboxrd@z Thu Jan 1 00:00:00 1970 From: richard.zhao@linaro.org (Richard Zhao) Date: Thu, 5 Jan 2012 15:59:22 +0800 Subject: [PATCH v3 2/2] dma/imx-sdma: use writel to write register when enable a channel In-Reply-To: <1325750362-22598-1-git-send-email-richard.zhao@linaro.org> References: <1325750362-22598-1-git-send-email-richard.zhao@linaro.org> Message-ID: <1325750362-22598-3-git-send-email-richard.zhao@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org dma_alloc_coherent memory may be bufferable when set CONFIG_ARM_DMA_MEM_BUFFERABLE. We need to add nececcary memory barrier. writel implicitly call wmb in such case. Signed-off-by: Richard Zhao --- drivers/dma/imx-sdma.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c index c2bc4f1..e987468 100644 --- a/drivers/dma/imx-sdma.c +++ b/drivers/dma/imx-sdma.c @@ -396,7 +396,7 @@ static int sdma_config_ownership(struct sdma_channel *sdmac, static void sdma_enable_channel(struct sdma_engine *sdma, int channel) { - __raw_writel(1 << channel, sdma->regs + SDMA_H_START); + writel(1 << channel, sdma->regs + SDMA_H_START); } /* -- 1.7.5.4