From: Marek Vasut <marex@denx.de>
To: Michal Suchanek <hramrach@gmail.com>
Subject: Re: [PATCH 00/11] Enable access to SPI NOR flash on Samsung Snow board
Date: Thu, 4 Jun 2015 00:53:29 +0200
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Cc: Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        Kumar Gala <galak@codeaurora.org>,
        Russell King <linux@arm.linux.org.uk>, Kukjin Kim <kgene@kernel.org>,
        Krzysztof Kozlowski <k.kozlowski@samsung.com>,
        Vinod Koul <vinod.koul@intel.com>,
        Dan Williams <dan.j.williams@intel.com>,
        David Woodhouse <dwmw2@infradead.org>,
        Brian Norris <computersforpeace@gmail.com>,
        Han Xu <han.xu@freescale.com>, Mark Brown <broonie@kernel.org>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        " =?utf-8?q?Rafa=C5=82?= =?utf-8?q?_Mi=C5=82ecki?=" 
	<zajec5@gmail.com>,
        Alison Chaiken <alison_chaiken@mentor.com>,
        Huang Shijie <b32955@freescale.com>,
        Ben Hutchings <ben@decadent.org.uk>,
        Knut Wohlrab <knut.wohlrab@de.bosch.com>,
        "Bean Huo =?utf-8?q?=E9=9C=8D=E6=96=8C=E6=96=8C?= \(beanhuo\)" 
	<beanhuo@micron.com>,
        "grmoore@altera.com" <grmoore@altera.com>, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-samsung-soc@vger.kernel.org, dmaengine@vger.kernel.org,
        linux-mtd@lists.infradead.org, linux-spi@vger.kernel.org
References: <cover.1433364398.git.hramrach@gmail.com>
In-Reply-To: <cover.1433364398.git.hramrach@gmail.com>
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On Wednesday, June 03, 2015 at 11:26:39 PM, Michal Suchanek wrote:
> Hello,

Hi,

> this patch series makes it possible to access the SPI NOR flash in the
> Samsung XE303 'Snow' Chromebook.
> 
> Unfortunately not all issues are resolved. To work around an issue with the
> pl330 dma engine I respun the patch for limiting transfer size in m25p80
> driver.

Looks like fixing a bug at the wrong place to me ...

> As the flash does not contain any sane filesystem and is only likely to be
> accessed with mtd_debug or similar tool the limit of the dma engine is
> easily reached. Filesystems using shorter data transfers are less likely
> to be affected.

Sounds like the DMA engine driver should be fixed.

Best regards,
Marek Vasut
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