[PATCH] mtd: cfi: Wait for Block Erase operation to finish

Artem Bityutskiy dedekind1 at gmail.com
Tue Mar 13 08:48:56 EDT 2012

On Tue, 2012-03-13 at 09:27 +0100, Joakim Tjernlund wrote:
> >
> > On Fri, 2012-03-02 at 15:30 +0100, Joakim Tjernlund wrote:
> > > yes, UBI probably has some different use. One seems that it keeps
> > > erasing the
> > > same block over and over again if the erase fails. JFFS2 doesn't do
> > > that since
> > > you can't trust a block that is failing erase(how can you be sure that
> > > write will work?)
> > > So, IMHO, UBIFS should reconsider this policy.
> >
> > The thread is very long and I would like save my time by not going
> > through it. But if you could start a new thread and formulate the
> > problem with UBI, I could think about it a bit. I am open to change
> > policies if it is not too much work.  Otherwise I am open to give hints
> > and suggestions and accept patches which change the policy. :-)
> I just noted from one of the logs Paul sent, it LOOKED like UBI tried
> to erase the same sector several times if erase failed, gave me the impression
> that UBI would try erasing a failing sector over and over again.
> I think Paul will have to provide details if this is the case or not.

Correct, UBI does retry erasing several times, see function
'do_sync_erase()' in drivers/mtd/ubi/io.c. Why would this be a problem?

Best Regards,
Artem Bityutskiy
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