linux-kernel - Re: [PATCH v3 1/3] UBI: Do not zero out EC and VID on ECC-ed NOR flashes

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Message-ID: <CAFLxGvz2LnHBFK61Dp7T-aSqdLY1xVLmuHQyOgxMQ9bmcZQK_Q@mail.gmail.com>
Date:   Mon, 14 Dec 2020 00:25:30 +0100
From:   Richard Weinberger <richard.weinberger@...il.com>
To:     Pratyush Yadav <p.yadav@...com>
Cc:     Tudor Ambarus <tudor.ambarus@...rochip.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 1/3] UBI: Do not zero out EC and VID on ECC-ed NOR flashes

On Tue, Dec 8, 2020 at 7:17 PM Pratyush Yadav <p.yadav@...com> wrote:
>
> Richard,
>
> On 01/12/20 03:57PM, Pratyush Yadav wrote:
> > For NOR flashes EC and VID are zeroed out before an erase is issued to
> > make sure UBI does not mistakenly treat the PEB as used and associate it
> > with an LEB.
> >
> > But on some flashes, like the Cypress Semper S28 SPI NOR flash family,
> > multi-pass page programming is not allowed on the default ECC scheme.
> > This means zeroing out these magic numbers will result in the flash
> > throwing a page programming error.
> >
> > Do not zero out EC and VID for such flashes. A writesize > 1 is an
> > indication of an ECC-ed flash.
>
> Patches 2/3 and 3/3 have been picked up in the spi-nor tree. Can you
> please pick this patch up?

Yep, patch is in my next tree.

-- 
Thanks,
//richard