linux-kernel - Re: [PATCH v2 1/3] mtd: rawnand: sunxi: Update OOB layout to match hardware

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Date:   Mon,  6 Feb 2023 12:55:26 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Samuel Holland <samuel@...lland.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>
Cc:     Boris Brezillon <bbrezillon@...nel.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Chen-Yu Tsai <wens@...e.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mtd@...ts.infradead.org, linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH v2 1/3] mtd: rawnand: sunxi: Update OOB layout to match hardware

On Sat, 2023-02-04 at 14:35:18 UTC, Samuel Holland wrote:
> When using the hardware ECC engine, the OOB data is made available in
> the NFC_REG_USER_DATA registers, as one 32-bit word per ECC step. Any
> additional bytes are only accessible through raw reads and software
> descrambling. For efficiency, and to match the vendor driver, ignore
> these extra bytes when using hardware ECC.
> 
> Note that until commit 34569d869532 ("mtd: rawnand: sunxi: Fix the size
> of the last OOB region"), this extra free area was reported with length
> zero, so this is not a functional change for any stable kernel user.
> 
> Signed-off-by: Samuel Holland <samuel@...lland.org>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git nand/next, thanks.

Miquel