Re: [PATCH v2] i2c: i2c-mxs: Use DMA mode even for small transfers

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Dear Fabio Estevam,

> Hi Wolfram,
> 
> On Mon, Jul 1, 2013 at 11:23 PM, Shawn Guo <shawn.guo@xxxxxxxxxx> wrote:
> > On Mon, Jul 01, 2013 at 06:14:21PM -0300, Fabio Estevam wrote:
> >> From: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
> >> 
> >> Recently we have been seing some reports about PIO mode not working
> >> properly.
> >> 
> >> - http://www.spinics.net/lists/linux-i2c/msg11985.html
> >> - http://marc.info/?l=linux-i2c&m=137235593101385&w=2
> >> - https://lkml.org/lkml/2013/6/24/430
> > 
> > It also causes sgtl5000 register write failure [1].  Changing it back to
> > DMA mode fixes the failure.  So,
> > 
> > Acked-by: Shawn Guo <shawn.guo@xxxxxxxxxx>
> > 
> > [1] http://thread.gmane.org/gmane.linux.alsa.devel/109715/focus=109747
> 
> Any comment about this patch, please?
> 
> If you are happy with it, could we please have it applied into stable?
> 
> 3.10 is currently broken without this patch.

Hi, either this or the PIO fix, but that's a RFC and quite a big slab of change 
which still needs some work. So please apply this and let's try the PIOfix for 
3.11 or 3.12.

Best regards,
Marek Vasut
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