linux-kernel - Re: [PATCH v1 2/4] dmaengine: imx-sdma: add check_bd

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Message-ID: <20180711063248.pnulmlj3qtcjpsh5@pengutronix.de>
Date:   Wed, 11 Jul 2018 08:32:48 +0200
From:   Sascha Hauer <s.hauer@...gutronix.de>
To:     Robin Gong <yibin.gong@....com>
Cc:     vkoul@...nel.org, dan.j.williams@...el.com, shawnguo@...nel.org,
        fabio.estevam@....com, linux@...linux.org.uk,
        linux-arm-kernel@...ts.infradead.org, kernel@...gutronix.de,
        dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-imx@....com
Subject: Re: [PATCH v1 2/4] dmaengine: imx-sdma: add check_bd_buswidth() to
 kill the dulicated code

On Wed, Jul 11, 2018 at 12:23:11AM +0800, Robin Gong wrote:
> Add check_bd_buswidth() to minimize the code size.
> 
> Signed-off-by: Robin Gong <yibin.gong@....com>
> ---
>  drivers/dma/imx-sdma.c | 64 +++++++++++++++++++++++---------------------------
>  1 file changed, 29 insertions(+), 35 deletions(-)
> 
> diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
> index 27ccabf..ed2267d 100644
> --- a/drivers/dma/imx-sdma.c
> +++ b/drivers/dma/imx-sdma.c
> @@ -1326,6 +1326,33 @@ static struct sdma_desc *sdma_transfer_init(struct sdma_channel *sdmac,
>  	return NULL;
>  }
>  
> +static int check_bd_buswidth(struct sdma_buffer_descriptor *bd,
> +			     struct sdma_channel *sdmac, int count,
> +			     dma_addr_t dma_dst, dma_addr_t dma_src)
> +{

Better name this function set_bd_buswidth. I would assume that a
function named check_foo actually checks something, but doesn't set
anything.

Sascha

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