linux-kernel - Re: [PATCH 1/6] dmaengine: introduce is_slave

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Message-ID: <20121116142104.GT17774@intel.com>
Date:	Fri, 16 Nov 2012 16:21:04 +0200
From:	Mika Westerberg <mika.westerberg@...ux.intel.com>
To:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:	Vinod Koul <vinod.koul@...el.com>,
	spear-devel <spear-devel@...t.st.com>,
	linux-kernel@...r.kernel.org,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Guennadi Liakhovetski <g.liakhovetski@....de>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH 1/6] dmaengine: introduce is_slave_xfer function

On Fri, Nov 16, 2012 at 03:59:14PM +0200, Andy Shevchenko wrote:
> This function helps to distinguish the slave type of transfer by checking the
> direction parameter.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Cc: Nicolas Ferre <nicolas.ferre@...el.com>
> Cc: Mika Westerberg <mika.westerberg@...ux.intel.com>
> Cc: Guennadi Liakhovetski <g.liakhovetski@....de>
> Cc: Linus Walleij <linus.walleij@...aro.org>
> ---
>  include/linux/dmaengine.h |    5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
> index 6402b18..3e1a9026 100644
> --- a/include/linux/dmaengine.h
> +++ b/include/linux/dmaengine.h
> @@ -618,6 +618,11 @@ static inline int dmaengine_slave_config(struct dma_chan *chan,
>  			(unsigned long)config);
>  }
>  
> +static inline bool is_slave_xfer(enum dma_transfer_direction direction)
> +{
> +	return (direction == DMA_MEM_TO_DEV) || (direction == DMA_DEV_TO_MEM);
> +}

I wonder if the above function need some prefix like
dmaengine_is_slave_xfer()?

Otherwise looks fine to me.
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