Messages in this thread Patch in this message | | | From | Richard Zhao <> | Subject | [PATCH v3 2/2] dma/imx-sdma: use writel to write register when enable a channel | Date | Thu, 5 Jan 2012 15:59:22 +0800 |
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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 <richard.zhao@linaro.org> --- 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
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