[PATCH 2/2] mtd: nand_bbt: Skip bad blocks when searching for the BBT in NAND

[Stefan Riedmüller]

Hi Sascha,

unfortunately this Patch has caused a regression on imx27 in Linux and will be
reverted for now. I would suggest to do the same here until a proper solution
is found.

http://lists.infradead.org/pipermail/linux-mtd/2021-April/086124.html

Sorry for the trouble!

Regards,
Stefan


On Wed, 2021-04-14 at 16:36 +0200, sha at pengutronix.de wrote:
> 0.08
> 
> Hi Stefan,
> 
> On Wed, Apr 14, 2021 at 01:18:39PM +0000, Stefan Riedmüller wrote:
> > Hi Sascha,
> > 
> > just wanted to let you know that the kernel patch has been accepted and is
> > included in the pull request for 5.13.
> 
> Thanks for the effort. I just merged it into barebox.
> 
> Sascha
> 
> 
> > https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git/log/?h=nand/for-5.13
> > 
> > Regards,
> > Stefan
> > 
> > On Mon, 2021-03-29 at 07:20 +0000, Stefan Riedmüller wrote:
> > > Hi Sascha,
> > > 
> > > here is the link to the kernel patch.
> > > Sorry, I forgot to put you in cc.
> > > 
> > > https://patchwork.ozlabs.org/project/linux-mtd/patch/20210325102337.481172-1-s.riedmueller@phytec.de/
> > > 
> > > Stefan
> > > 
> > > On Mon, 2021-03-22 at 06:59 +0100, sha at pengutronix.de wrote:
> > > > On Wed, Mar 17, 2021 at 05:14:05PM +0000, Stefan Riedmüller wrote:
> > > > > Hi Sascha,
> > > > > 
> > > > > On Wed, 2021-03-17 at 10:41 +0100, Sascha Hauer wrote:
> > > > > > Hi Stefan,
> > > > > > 
> > > > > > On Tue, Mar 16, 2021 at 01:36:26PM +0100, Stefan Riedmueller
> > > > > > wrote:
> > > > > > > The blocks containing the bad block table can become bad as
> > > > > > > well. So
> > > > > > > make sure to skip any blocks that are marked bad when searching
> > > > > > > for
> > > > > > > the
> > > > > > > bad block table.
> > > > > > 
> > > > > > The file is a more or less direct copy from the kernel. Does the
> > > > > > problem
> > > > > > exist in the kernel as well?
> > > > > 
> > > > > From my point of view I would say yes. I have just made a small test
> > > > > Issue
> > > > > is
> > > > > shown in the kernel as well. It is a very raw case where two BBT
> > > > > blocks
> > > > > need
> > > > > to be worn out but on the other hand this fix should not have that
> > > > > much
> > > > > of
> > > > > an
> > > > > impact.
> > > > > 
> > > > > I will send a similar patch to the kernel.
> > > > 
> > > > I'd like to delay this one until it is accepted in the kernel. I do
> > > > not
> > > > fully understand the consequences of this patch, but hopefully on the
> > > > mtd list there is someone.
> > > > 
> > > > Sascha
> > > > 
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