linux-kernel - Re: [PATCH 0/5] AM33xx: MMC resources from DT without HWMOD data

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Date:	Fri, 28 Jun 2013 21:18:59 +0530
From:	Balaji T K <balajitk@...com>
To:	"Fernandes, Joel" <joelf@...com>
CC:	<benoit.cousson@...il.com>, "lars@...afoo.de" <lars@...afoo.de>,
	Tony Lindgren <tony@...mide.com>,
	"Nori, Sekhar" <nsekhar@...com>, Matt Porter <matt@...orter.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Vinod Koul <vinod.koul@...el.com>,
	Mark Brown <broonie@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	Rob Landley <rob@...dley.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jason Kridner <jkridner@...gleboard.org>,
	Koen Kooi <koen@...gleboard.org>, Chris Ball <cjb@...top.org>,
	Devicetree Discuss <devicetree-discuss@...ts.ozlabs.org>,
	Linux OMAP List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux DaVinci Kernel List 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux MMC List <linux-mmc@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 0/5] AM33xx: MMC resources from DT without HWMOD data

On Thursday 27 June 2013 11:38 PM, Fernandes, Joel wrote:
> Hi Balaji,
>

<snip>

>>> Some patches were squashed and others dropped in the series resulting
>>> in the single patch above. This patch should be good to apply
>> Hi Joel,
>>
>> Before pushing mmc dts support for am335x, Can you please let me
>> know if below 2 patches [1] are merged/accepted,
>> IIRC these patches are needed for MMC to work properly.
>>
>> I suggest to hold the dts patch until slave_sg_limit gets merged
>> otherwise it will cause regression in am335x mmc.
>>
>> [PATCH v4 1/3] dmaengine: add dma_get_slave_sg_limits()
>> [PATCH v4 2/3] dma: edma: add device_slave_sg_limits() support
>
> Actually this is an independent regression and is currently worked on by Lars-Peter Clausen [1].
>
> Currently not having the MMC DTS merged is also a regression,

No, Right now mmc support is not added to am335x, so it is not really a regression

 > so I suggest lets take it one
> step at a time and get the DTS merged in first. Also there will be overhead of reposting this
> DTS patch later again which will not change. What do you say?
>

If it gets enabled via dts, without slave sg limit support,
file read/write will fail, possibly corrupting file system.

> Thanks,
>
> -Joel
>
> [1] https://patchwork.kernel.org/patch/2228041/
>

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