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Date: Tue, 21 Aug 2012 11:35:18 +0200
From: Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= <u.kleine-koenig@pengutronix.de>
To: Artem Bityutskiy <dedekind1@gmail.com>
Subject: Re: another issue with ubifs on v3.6-rc2: attaching an formatted
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On Mon, Aug 20, 2012 at 10:11:07PM +0300, Artem Bityutskiy wrote:
> On Mon, 2012-08-20 at 18:07 +0200, Uwe Kleine-König wrote:
> > [  163.714143] uncorrectable error : 
> > [  163.727597] UBI warning: ubi_io_read: error -74 (ECC error) while
> > reading 64 bytes from PEB 0:0, read only 64 bytes, retry
> > [  163.740737] uncorrectable error : 
> > [  163.744032] UBI warning: ubi_io_read: error -74 (ECC error) while
> > reading 64 bytes from PEB 0:0, read only 64 bytes, retry
> > [  163.757119] uncorrectable error : 
> > [  163.760487] UBI warning: ubi_io_read: error -74 (ECC error) while
> > reading 64 bytes from PEB 0:0, read only 64 bytes, retry
> > [  163.774427] uncorrectable error : 
> > [  163.777808] UBI error: ubi_io_read: error -74 (ECC error) while
> > reading 64 bytes from PEB 0:0, read 64 bytes 
> 
> This looks like your flash does not really support sub-pages while
> declares that it does. Check it with MTD subpage test.
the subpages test fails with:

[   82.435792] mtd_subpagetest: written up to eraseblock 7424
[   82.905775] mtd_subpagetest: written up to eraseblock 7680
[   83.375201] mtd_subpagetest: written up to eraseblock 7936
[   83.840447] mtd_subpagetest: written 8192 eraseblocks
[   83.845522] mtd_subpagetest: verifying all eraseblocks
[   83.852740] uncorrectable error : 
[   83.856086] mtd_subpagetest: error: read failed at 0x0
[   83.861469] mtd_subpagetest: error -74 occurred
[   83.866093] =================================================
Error: could not insert module ./drivers/mtd/tests/mtd_subpagetest.ko: Bad message

I don't have a clue yet how to debug that further. Will start with
checking older kernel releases. Any hints welcome.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |