linux-kernel - Re: [PATCH v4 08/10] spi: rockchip: modify DMA max burst to 1

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Message-ID: <20150911112807.GH12027@sirena.org.uk>
Date:	Fri, 11 Sep 2015 12:28:07 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Shawn Lin <shawn.lin@...k-chips.com>
Cc:	Vinod Koul <vinod.koul@...el.com>,
	Heiko Stuebner <heiko@...ech.de>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Doug Anderson <dianders@...omium.org>,
	Olof Johansson <olofj@...gle.com>,
	Sonny Rao <sonnyrao@...omium.org>,
	Addy Ke <addy.ke@...k-chips.com>, dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org, alsa-devel@...a-project.org,
	linux-spi@...r.kernel.org, Olof Johansson <olof@...om.net>
Subject: Re: [PATCH v4 08/10] spi: rockchip: modify DMA max burst to 1

On Sun, Sep 06, 2015 at 09:13:06AM +0800, Shawn Lin wrote:
> From: Addy Ke <addy.ke@...k-chips.com>
> 
> Generic dma controller on Rockchips' platform cannot support
> DMAFLUSHP instruction which make dma to flush the req of non-aligned
> or non-multiple of what we need. That will cause an unrecoverable
> dma bus error. The saftest way is to set dma max burst to 1.

Acked-by: Mark Brown <broonie@...nel.org>

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