Re: UBI/UBIFS issue: corrupt empty space => switched to read-only mode

[Ivan Djelic <ivan.djelic@parrot.com>]

On Sat, Apr 14, 2012 at 01:32:40PM +0100, Artem Bityutskiy wrote:
> On Sat, 2012-04-14 at 14:11 +0200, Ivan Djelic wrote:
> > On Fri, Apr 13, 2012 at 04:20:45PM +0100, Artem Bityutskiy wrote:
> > > > > On Fri, 2012-03-16 at 17:14 +0100, Matteo Mattei wrote:
> > > > > > Hi guys,
> > > > > > 
> > > > > > I am working hard on UBIFS to make it works on 2.6.32 and OMAP3530.
> > > > > > 
> > > > > > I already posted some requests to TI forum but I have no answers up to now:
> > > > > > http://e2e.ti.com/support/embedded/linux/f/354/t/171839.aspx#627875
> > 
> > Hello Matteo,
> > 
> > I have been using a very similar setup (2.6.32 + OMAP3630), and I added BCH support
> > (8-bit correction) to the mtd omap2 driver, using the BCH library (not TI implementation).
> > My patch corrects bitflips on empty space (erased pages), so that UBIFS does not choke on corrupted empty space.
> > 
> > I posted a patch a while ago, albeit for a more recent kernel version:
> > http://lists.infradead.org/pipermail/linux-mtd/2011-October/038207.html
> > bit I did not get much feedback from TI maintainers.
> > 
> > If you have some trouble backporting this patch to your kernel, let me know, I may
> > have an old 2.6.32 version of the patch somewhere on my hdd :).
> 
> If we have a "tested-by" - we can make them go in via the MTD tree. It
> looks like Matthieu successfully tested them?

Yes; I guess I'll need to submit a patch to linux-omap first, because OMAP GPMC related code
(needed for ecc) has been moved from the mtd driver to arch/arm/mach-omap2.
Also, I wrote the patch for 2.6.35, and I don't have much resources to run it on a recent
kernel. If Matteo or anybody interested could test it, that would be great.

BR,
--
Ivan