linux-kernel - Re: [PATCH] nand: brcmnand: fix OOB R/W with Hamming ECC

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Message-Id: <0670B343-C39E-4610-8061-A7F81F90B9F4@gmail.com>
Date:   Wed, 24 Feb 2021 08:16:58 +0100
From:   Álvaro Fernández Rojas <noltari@...il.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     Brian Norris <computersforpeace@...il.com>,
        Kamal Dasu <kdasu.kdev@...il.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nand: brcmnand: fix OOB R/W with Hamming ECC

Hi Florian,

> El 24 feb 2021, a las 4:46, Florian Fainelli <f.fainelli@...il.com> escribió:
> 
> 
> 
> On 2/22/2021 12:16 PM, Álvaro Fernández Rojas wrote:
>> Hamming ECC doesn't cover the OOB data, so reading or writing OOB shall
>> always be done without ECC enabled.
>> This is a problem when adding JFFS2 cleanmarkers to erased blocks. If JFFS2
>> clenmarkers are added to the OOB with ECC enabled, OOB bytes will be changed
>> from ff ff ff to 00 00 00, reporting incorrect ECC errors.
>> 
>> Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
> 
> Should there be a Fixes: tag provided here for back porting to stable trees?

I think so, but the fixed commit would be the first one, right?
27c5b17cd1b10564fa36f8f51e4b4b41436ecc32

> -- 
> Florian

Best regards,
Álvaro.