linux-kernel - Re: CONFIG_OF vs DMA

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Date:	Fri, 21 Aug 2015 13:56:36 +0530
From:	Vinod Koul <vinod.koul@...el.com>
To:	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Cc:	Dan Williams <dan.j.williams@...el.com>, dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: CONFIG_OF vs DMA_OF

On Fri, Aug 21, 2015 at 05:35:58AM +0000, Kuninori Morimoto wrote:
> 
> Hi Vinod
> 
> ${LINUX}/drivers/dma/of-dma.c will be compiled if .config has DMA_OF
> 
> 	obj-$(CONFIG_DMA_OF) += of-dma.o
> 
> But, ${LINUX}/include/linux/of_dma.h is based on CONFIG_OF

Intially it was OF only and then DMA_OF was added. I think we missed it
during the move, so yes your below patch makes sense

Can you please send as formal patch for me to apply

-- 
~Vinod

> 
> 	#ifdef CONFIG_OF
> 	extern int of_dma_controller_register(struct device_node *np,
> 	...
> 	#else
> 	static inline int of_dma_controller_register(struct device_node *np,
> 	...
> 	#endif
> 
> I have issue if .config has CONFIG_OF but not have DMA_OF.
> Is this correct patch ?
> 
> ---------------------------------
> diff --git a/include/linux/of_dma.h b/include/linux/of_dma.h
> index 98ba752..9440622 100644
> --- a/include/linux/of_dma.h
> +++ b/include/linux/of_dma.h
> @@ -34,7 +34,7 @@ struct of_dma_filter_info {
>         dma_filter_fn   filter_fn;
>  };
>  
> -#ifdef CONFIG_OF
> +#ifdef DMA_OF
>  extern int of_dma_controller_register(struct device_node *np,
>                 struct dma_chan *(*of_dma_xlate)
>                 (struct of_phandle_args *, struct of_dma *),
> ---------------------------------
> 
> 
> Best regards
> ---
> Kuninori Morimoto

-- 
-- 
~Vinod
--
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