another issue with ubifs on v3.6-rc2: attaching an formatted device

[Huang Shijie]

于 2012年08月21日 17:35, Uwe Kleine-König 写道:
> 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
The mx35 does not use the gpmi nand driver, but the mxc-nand driver.

So I have no idea about this issue too. I do not know whether the 
mxc-nand support the subpage writes or not.

Best Regards
Huang Shijie
> 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
>