mxcmmc driver hangs on sync

[mhowe@cwlinux.com (Morgan Howe)]

Daniel,

On Tue, 15 Jun 2010 09:22:37 +0200
Daniel Mack <daniel@caiaq.de> wrote:
> On Tue, Jun 15, 2010 at 03:20:51PM +0800, Morgan Howe wrote:
> > On Tue, 15 Jun 2010 08:31:43 +0200
> > Daniel Mack <daniel@caiaq.de> wrote:
> > > On Tue, Jun 15, 2010 at 11:29:36AM +0800, Morgan Howe wrote:
> > > > With the older kernel this would hang on sync after a few
> > > > thousand loops, and much sooner if you ran 2 or 3 of these
> > > > processes at a time. I tried last night with the newer kernel
> > > > and kicking off 3 processes and after ~100-150 loops per
> > > > process I get this:
> > > 
> > > Which 'newer kernel' did you try?
> > 
> > Hey Daniel,
> > 
> > Sorry, I said current mainline, but actually it's 2.6.35-rc1.
> 
> Could you try two things:
> 
> a) build a kernel without MX2 DMA support
> b) try 2.6.34, as there were some updates to the mxcmmc driver after
>    2.6.34 which could be related

I have just been able to confirm using the final release of the 2.6.34
kernel that the problem also exists, with the same behavior as
described for 2.6.35.

Regards,
Morgan