From: Greg KH <greg@kroah.com>
To: Hauke Mehrtens <hauke@hauke-m.de>
Cc: stable@vger.kernel.org, John Audia <therealgraysky@proton.me>,
Ezra Buehler <ezra.buehler@husqvarnagroup.com>,
linux-mtd@lists.infradead.org,
Miquel Raynal <miquel.raynal@bootlin.com>
Subject: Re: Backport "mtd: spinand: Add support for 5-byte IDs" to 6.6, 6.7 and 6.8
Date: Sat, 30 Mar 2024 17:25:40 +0100 [thread overview]
Message-ID: <2024033034-volley-grout-f835@gregkh> (raw)
In-Reply-To: <de171eb5-3e95-4529-9228-9a4ed526ed46@hauke-m.de>
On Sat, Mar 30, 2024 at 02:49:56PM +0100, Hauke Mehrtens wrote:
> Hi,
>
> Please backport the following commit back to the Linux stable kernels 6.6,
> 6.7 and 6.8:
>
> commit 34a956739d295de6010cdaafeed698ccbba87ea4
> Author: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
> Date: Thu Jan 25 22:01:07 2024 +0200
>
> mtd: spinand: Add support for 5-byte IDs
>
> E.g. ESMT chips will return an identification code with a length of 5
> bytes. In order to prevent ambiguity, flash chips would actually need to
> return IDs that are up to 17 or more bytes long due to JEDEC's
> continuation scheme. I understand that if a manufacturer ID is located
> in bank N of JEDEC's database (there are currently 16 banks), N - 1
> continuation codes (7Fh) need to be added to the identification code
> (comprising of manufacturer ID and device ID). However, most flash chip
> manufacturers don't seem to implement this (correctly).
>
> Signed-off-by: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
> Reviewed-by: Martin Kurbanov <mmkurbanov@salutedevices.com>
> Tested-by: Martin Kurbanov <mmkurbanov@salutedevices.com>
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> Link:
> https://lore.kernel.org/linux-mtd/20240125200108.24374-2-ezra@easyb.ch
>
>
> This will fix a regression introduced between Linux kernel 6.6.22 and 6.6.23
> in OpenWrt. The esmt NAND flash is not detected any more:
> <3>[ 0.885607] spi-nand spi0.0: unknown raw ID c8017f7f
> <4>[ 0.890852] spi-nand: probe of spi0.0 failed with error -524
> See: https://github.com/openwrt/openwrt/pull/14992
>
>
> The following commit was backported to 6.6.22, but the commit it depends on
> was not backported.
> commit 4bd14b2fd8a83a2f5220ba4ef323f741e11bfdfd
> Author: Ezra Buehler <ezra.buehler@husqvarnagroup.com>
> Date: Thu Jan 25 22:01:08 2024 +0200
>
> mtd: spinand: esmt: Extend IDs to 5 bytes
Now queued up, thanks.
greg k-h
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prev parent reply other threads:[~2024-03-30 16:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-30 13:49 Backport "mtd: spinand: Add support for 5-byte IDs" to 6.6, 6.7 and 6.8 Hauke Mehrtens
2024-03-30 16:25 ` Greg KH [this message]
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