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

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Date:	Fri, 28 Jun 2013 16:56:04 +0000
From:	"Fernandes, Joel" <joelf@...com>
To:	"Krishnamoorthy, Balaji T" <balajitk@...com>
CC:	"benoit.cousson@...il.com" <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

> -----Original Message-----
> From: Krishnamoorthy, Balaji T
> Sent: Friday, June 28, 2013 10:49 AM
> To: Fernandes, Joel
> Cc: benoit.cousson@...il.com; lars@...afoo.de; Tony Lindgren; Nori, Sekhar;
> Matt Porter; Grant Likely; Rob Herring; Vinod Koul; Mark Brown; Russell King;
> Rob Landley; Andrew Morton; Jason Kridner; Koen Kooi; Chris Ball; Devicetree
> Discuss; Linux OMAP List; Linux ARM Kernel List; Linux DaVinci Kernel List;
> Linux Kernel Mailing List; Linux MMC List; Arnd Bergmann
> 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.

I agree with this. Thank you.

Tony, Benoit, I guess let's just not apply the DTS yet till the slave-sg limits support
is merged as well. Sorry for the noise. Thanks.

-Joel

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