linux-kernel - (subset) Re: [PATCH v2 0/6] Avoid odd length/address read/writes in 8D-8D-8D mode.

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Message-ID: <164026605398.210110.7825546754254895590.b4-ty@microchip.com>
Date:   Thu, 23 Dec 2021 15:31:08 +0200
From:   Tudor Ambarus <tudor.ambarus@...rochip.com>
To:     Michael Walle <michael@...le.cc>, <linux-mtd@...ts.infradead.org>,
        "Miquel Raynal" <miquel.raynal@...tlin.com>,
        Mark Brown <broonie@...nel.org>,
        <linux-kernel@...r.kernel.org>, Pratyush Yadav <p.yadav@...com>,
        "Richard Weinberger" <richard@....at>, <linux-spi@...r.kernel.org>,
        Vignesh Raghavendra <vigneshr@...com>
CC:     Tudor Ambarus <tudor.ambarus@...rochip.com>
Subject: (subset) Re: [PATCH v2 0/6] Avoid odd length/address read/writes in 8D-8D-8D mode.

On Mon, 31 May 2021 23:47:51 +0530, Pratyush Yadav wrote:
> On Octal DTR flashes like Micron Xcella or Cypress S28 family, reads or
> writes cannot start at an odd address in 8D-8D-8D mode. Neither can they
> be odd bytes long. Upper layers like filesystems don't know what mode
> the flash is in, and hence don't know the read/write address or length
> limitations. They might issue reads or writes that leave the flash in an
> error state. In fact, using UBIFS on top of the flash was how I first
> noticed this problem.
> 
> [...]

Applied to spi-nor/next, thanks!

[1/6] mtd: spi-nor: core: use 2 data bytes for template ops
      https://git.kernel.org/mtd/c/0d051a49829a
[2/6] mtd: spi-nor: spansion: write 2 bytes when disabling Octal DTR mode
      https://git.kernel.org/mtd/c/63017068a6d9
[3/6] mtd: spi-nor: micron-st: write 2 bytes when disabling Octal DTR mode
      https://git.kernel.org/mtd/c/9de3cb1cc95b

Best regards,
-- 
Tudor Ambarus <tudor.ambarus@...rochip.com>