linux-kernel - Re: [resend][PATCH 03/16] dmaengine: introduce is_slave

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Date:	Wed, 9 Jan 2013 05:50:06 -0800
From:	Vinod Koul <vinod.koul@...el.com>
To:	Andy Shevchenko <andriy.shevchenko@...ux.jf.intel.com>
Cc:	linux-kernel@...r.kernel.org,
	Viresh Kumar <viresh.kumar@...aro.org>,
	spear-devel <spear-devel@...t.st.com>
Subject: Re: [resend][PATCH 03/16] dmaengine: introduce is_slave_xfer
 function

On Wed, Jan 09, 2013 at 10:17:02AM +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>
> Reviewed-by: Viresh Kumar <viresh.kumar@...aro.org>
> Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> Cc: Nicolas Ferre <nicolas.ferre@...el.com>
> Cc: Guennadi Liakhovetski <g.liakhovetski@....de>
> ---
>  include/linux/dmaengine.h |    5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
> index 4ca9cf7..b196ea3 100644
> --- a/include/linux/dmaengine.h
> +++ b/include/linux/dmaengine.h
> @@ -621,6 +621,11 @@ 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);
> +}
After reading the subsequent patch I understand what is intent here. Perhaps
is_slave_dirn() would have been a beter one...

> +
>  static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_single(
>  	struct dma_chan *chan, dma_addr_t buf, size_t len,
>  	enum dma_transfer_direction dir, unsigned long flags)
> -- 
> 1.7.10.4
> 
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