From: Vinod Koul <vkoul@kernel.org>
To: Fuqian Huang <huangfq.daxian@gmail.com>
Cc: Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
linux-kernel@vger.kernel.org, NXP Linux Team <linux-imx@nxp.com>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
dmaengine@vger.kernel.org,
Dan Williams <dan.j.williams@intel.com>,
Fabio Estevam <festevam@gmail.com>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 12/87] dma: imx-sdma: Remove call to memset after dma_alloc_coherent
Date: Mon, 1 Jul 2019 10:24:43 +0530 [thread overview]
Message-ID: <20190701045443.GI2911@vkoul-mobl> (raw)
In-Reply-To: <20190627173536.2457-1-huangfq.daxian@gmail.com>
On 28-06-19, 01:35, Fuqian Huang wrote:
> In commit af7ddd8a627c
> ("Merge tag 'dma-mapping-4.21' of git://git.infradead.org/users/hch/dma-mapping"),
> dma_alloc_coherent has already zeroed the memory.
> So memset is not needed.
Please point to the exact commit and not the merge commit. Hint use git
blame on that file...
>
> Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
> ---
> drivers/dma/imx-sdma.c | 4 ----
> 1 file changed, 4 deletions(-)
>
> diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
> index 99d9f431ae2c..54d86359bdf8 100644
> --- a/drivers/dma/imx-sdma.c
> +++ b/drivers/dma/imx-sdma.c
> @@ -1886,10 +1886,6 @@ static int sdma_init(struct sdma_engine *sdma)
> sdma->context_phys = ccb_phys +
> MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control);
>
> - /* Zero-out the CCB structures array just allocated */
> - memset(sdma->channel_control, 0,
> - MAX_DMA_CHANNELS * sizeof (struct sdma_channel_control));
> -
> /* disable all channels */
> for (i = 0; i < sdma->drvdata->num_events; i++)
> writel_relaxed(0, sdma->regs + chnenbl_ofs(sdma, i));
> --
> 2.11.0
--
~Vinod
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prev parent reply other threads:[~2019-07-01 4:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-27 17:35 [PATCH 12/87] dma: imx-sdma: Remove call to memset after dma_alloc_coherent Fuqian Huang
2019-07-01 4:54 ` Vinod Koul [this message]
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