linux-kernel - Re: [PATCH 4/4] dmaengine: edma: Add support for DMA filter mapping to slave devices

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Date:	Thu, 3 Dec 2015 17:46:18 +0200
From:	Peter Ujfalusi <peter.ujfalusi@...com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	<vinod.koul@...el.com>, <andy.shevchenko@...il.com>,
	<linux-kernel@...r.kernel.org>, <dmaengine@...r.kernel.org>,
	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <nsekhar@...com>,
	<tony@...mide.com>
Subject: Re: [PATCH 4/4] dmaengine: edma: Add support for DMA filter mapping
 to slave devices

On 12/03/2015 05:38 PM, Arnd Bergmann wrote:
> On Thursday 03 December 2015 16:33:12 Peter Ujfalusi wrote:
>> diff --git a/drivers/dma/edma.c b/drivers/dma/edma.c
>> index 0675e268d577..46b305ea0d21 100644
>> --- a/drivers/dma/edma.c
>> +++ b/drivers/dma/edma.c
>> @@ -2297,6 +2297,12 @@ static int edma_probe(struct platform_device *pdev)
>>                 edma_set_chmap(&ecc->slave_chans[i], ecc->dummy_slot);
>>         }
>>  
>> +       if (info->slave_map) {
>> +               ecc->dma_slave.filter_map.map = info->slave_map;
>> +               ecc->dma_slave.filter_map.mapcnt = info->slavecnt;
>> +               ecc->dma_slave.filter_map.filter_fn = edma_filter_fn;
>> +       }
>> +
>>
> 
> Just a minor comment here: I think all three assignments can be done
> unconditionally.

True.

> As I mentioned before, I'd also remove 'struct dma_filter'
> and put the three members in struct dma_device directly. In fact, the
> filter function can go with the other function pointers for consistency.

I just like to keep things in one place ;)
I don't have strong stand on keeping the intermediate 'struct dma_filter'
Let's hear from Vinod regarding to this

-- 
Péter
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