linux-kernel - Re: [PATCH 2/2] dw_dmac: make usage of dw_dma

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Date:	Thu, 15 Nov 2012 20:54:32 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
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
Subject: Re: [PATCH 2/2] dw_dmac: make usage of dw_dma_slave optional

On 15 November 2012 20:51, Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
> On Thu, 2012-11-15 at 20:28 +0530, viresh kumar wrote:
>> On Thu, Nov 15, 2012 at 7:50 PM, Andy Shevchenko
>> <andriy.shevchenko@...ux.intel.com> wrote:
>> > diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
>>
>> > +static inline bool dwc_is_slave(struct dma_slave_config *sconfig)
>> > +{
>> > +       return is_slave_direction(sconfig->direction);
>> > +}
>>
>> I will not buy this one. Why hide the real implementation, call
>> is_slave_direction()
>> directly.
>
> There is no strong reason to keep it so.
>
>> > @@ -1344,6 +1352,8 @@ struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan,
>> > +       sconfig->direction = direction;
>> > +
>>
>> > @@ -1718,6 +1728,7 @@ static int __devinit dw_probe(struct platform_device *pdev)
>> > +               dwc->dma_sconfig.direction = DMA_TRANS_NONE;
>>
>> Why do you need above changes??
>
> This one is not needed indeed. But we have to look after default (0)
> enum value.

I am asking about all lines where you are doing sconfig->direction = foo;
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