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From: Richard Weinberger <richard@nod.at>
To: Kees Trommel <ctrommel@aimvalley.nl>,
	Richard Weinberger <richard.weinberger@gmail.com>
Cc: Linux MTD <linux-mtd@lists.infradead.org>,
	Norbert van Bolhuis <nvbolhuis@aimvalley.nl>
Subject: Re: One bit flip in erased page causes uncorrectable error using (LS1020A) HW ECC
Date: Sun, 19 Mar 2017 21:34:17 +0100	[thread overview]
Message-ID: <d1cd9806-97e3-9eac-fff9-62819d3c5d12@nod.at> (raw)
In-Reply-To: <09b0b187-4232-0018-b112-c7f8d24d2cd7@aimvalley.nl>

Kees,

Am 14.03.2017 um 16:56 schrieb Kees Trommel:
> Richard,
> 
>> So, I fear your driver needs a better way to work around these bit flips
> 
> That was I afraid of, thanks for you answer.
> 
>> What exactly does UBI report?
> 
> fsl,ifc-nand 7e800000.flash: NAND Flash ECC Uncorrectable Error
> ubi0 warning: ubi_io_read: error -74 (ECC error) while reading 4096 bytes from PEB 500:4096, read only 4096 bytes, retry
> fsl,ifc-nand 7e800000.flash: NAND Flash ECC Uncorrectable Error
> ubi0 warning: ubi_io_read: error -74 (ECC error) while reading 4096 bytes from PEB 500:4096, read only 4096 bytes, retry
> fsl,ifc-nand 7e800000.flash: NAND Flash ECC Uncorrectable Error
> ubi0 warning: ubi_io_read: error -74 (ECC error) while reading 4096 bytes from PEB 500:4096, read only 4096 bytes, retry
> fsl,ifc-nand 7e800000.flash: NAND Flash ECC Uncorrectable Error
> ubi0 error: ubi_io_read: error -74 (ECC error) while reading 4096 bytes from PEB 500:4096, read 4096 bytes

Did you verify whether the data on PEB 500 are really 0xff bytes with bit-flips?

Thanks,
//richard

      reply	other threads:[~2017-03-19 20:34 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-07  9:15 One bit flip in erased page causes uncorrectable error using (LS1020A) HW ECC Kees Trommel
2017-03-09 22:15 ` Richard Weinberger
2017-03-14 15:56   ` Kees Trommel
2017-03-19 20:34     ` Richard Weinberger [this message]

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