linux-kernel - Re: [PATCH 2/9 v3] dma: shdma: prepare for conversion to the shdma base library

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Date:	Fri, 18 May 2012 10:21:28 +0200 (CEST)
From:	Guennadi Liakhovetski <g.liakhovetski@....de>
To:	Vinod Koul <vinod.koul@...ux.intel.com>
cc:	linux-kernel@...r.kernel.org, Magnus Damm <magnus.damm@...il.com>,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
	Paul Mundt <lethal@...ux-sh.org>, linux-sh@...r.kernel.org
Subject: Re: [PATCH 2/9 v3] dma: shdma: prepare for conversion to the shdma
 base library

On Tue, 15 May 2012, Vinod Koul wrote:

> On Wed, 2012-05-09 at 17:09 +0200, Guennadi Liakhovetski wrote:
> > By placing an anonymous union at the top of struct sh_dmae_slave we can
> > transparently prepare all device and client drivers for the upcoming
> > shdma-base conversion.
> > 
> > Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@....de>
> > ---
> >  include/linux/sh_dma.h |    8 ++++++--
> >  1 files changed, 6 insertions(+), 2 deletions(-)
> > 
> > diff --git a/include/linux/sh_dma.h b/include/linux/sh_dma.h
> > index 425450b..e081e8e 100644
> > --- a/include/linux/sh_dma.h
> > +++ b/include/linux/sh_dma.h
> > @@ -10,12 +10,16 @@
> >  #ifndef SH_DMA_H
> >  #define SH_DMA_H
> >  
> > -#include <linux/list.h>
> >  #include <linux/dmaengine.h>
> > +#include <linux/list.h>
> > +#include <linux/shdma-base.h>
> >  
> >  /* Used by slave DMA clients to request DMA to/from a specific peripheral */
> >  struct sh_dmae_slave {
> > -	unsigned int			slave_id; /* Set by the platform */
> > +	union {
> > +		unsigned int		slave_id; /* Set by the platform */
> > +		struct shdma_slave	shdma_slave;
> again, this should be move to dma_slave_config

Same reasoning as in patch 1: I think such changes should be done 
separately.

> > +	};
> >  	struct device			*dma_dev; /* Set by the platform */
> >  	const struct sh_dmae_slave_config	*config;  /* Set by the driver */
> >  };

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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