linux-kernel - Re: [PATCH] MTD: LPC32xx MLC NAND driver

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Message-ID: <4FB27CB0.8000308@antcom.de>
Date:	Tue, 15 May 2012 17:56:32 +0200
From:	Roland Stigge <stigge@...com.de>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
	dwmw2@...radead.org, kevin.wells@....com, srinivas.bakki@....com,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] MTD: LPC32xx MLC NAND driver

On 05/15/2012 05:49 PM, Roland Stigge wrote:
>>> +
>>> +	sg_init_one(&host->sgl, mem, len);
>>> +
>>> +	res = dma_map_sg(host->dma_chan->device->dev, &host->sgl, 1, dir);
>>
>> Also note that dma transfer directions and dma data directions are
>> different things.  You shouldn't mix the two.

Can I safely use DMA_BIDIRECTIONAL here (practically, it works - just
tested), because the caller asks for read _or_ write? Or do I need to
formally convert enum dma_transfer_direction to enum dma_data_direction?

Thanks in advance,

Roland
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