linux-kernel - Re: [PATCH] spi: pl022: Fix broken spidev when DMA is enabled

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Message-ID: <54358301.20505@broadcom.com>
Date:	Wed, 8 Oct 2014 11:31:29 -0700
From:	Ray Jui <rjui@...adcom.com>
To:	Mark Brown <broonie@...nel.org>
CC:	Grant Likely <grant.likely@...aro.org>,
	<linux-spi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	JD Zheng <jdzheng@...adcom.com>,
	"Scott Branden" <sbranden@...adcom.com>
Subject: Re: [PATCH] spi: pl022: Fix broken spidev when DMA is enabled



On 10/8/2014 11:21 AM, Mark Brown wrote:
> On Wed, Oct 08, 2014 at 09:14:35AM -0700, Ray Jui wrote:
>
>> Thanks for the reply. It looks like you are also the maintainer of spidev.
>> In this case, could you please help to confirm that you expect spidev to use
>> separate buffers for TX and RX? If so, I can go ahead and make the change in
>> spidev.
>
> Yes, that would be my expectation for maximum robustness (or if it is
> going to use one buffer it explicitly maps it for mixed use but I'd
> expect that to be asking for trouble).
>
Okay, Mark. I'm going to make the change in the spidev and submit a new 
patch.

Thanks for the feedback.

Ray
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