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Message-ID: <20190626084807.3f06e718@collabora.com>
Date: Wed, 26 Jun 2019 08:48:07 +0200
From: Boris Brezillon <boris.brezillon@...labora.com>
To: Naga Sureshkumar Relli <naga.sureshkumar.relli@...inx.com>
Cc: miquel.raynal@...tlin.com, helmut.grohne@...enta.de,
richard@....at, dwmw2@...radead.org, computersforpeace@...il.com,
marek.vasut@...il.com, vigneshr@...com, bbrezillon@...nel.org,
yamada.masahiro@...ionext.com, linux-mtd@...ts.infradead.org,
linux-kernel@...r.kernel.org
Subject: Re: [LINUX PATCH v17 1/2] mtd: rawnand: nand_micron: Do not over
write driver's read_page()/write_page()
On Mon, 24 Jun 2019 22:46:29 -0600
Naga Sureshkumar Relli <naga.sureshkumar.relli@...inx.com> wrote:
> Add check before assigning chip->ecc.read_page() and chip->ecc.write_page()
>
> Signed-off-by: Naga Sureshkumar Relli <naga.sureshkumar.relli@...inx.com>
> ---
> drivers/mtd/nand/raw/nand_micron.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/nand_micron.c b/drivers/mtd/nand/raw/nand_micron.c
> index cbd4f09ac178..565f2696c747 100644
> --- a/drivers/mtd/nand/raw/nand_micron.c
> +++ b/drivers/mtd/nand/raw/nand_micron.c
> @@ -500,8 +500,11 @@ static int micron_nand_init(struct nand_chip *chip)
> chip->ecc.size = 512;
> chip->ecc.strength = chip->base.eccreq.strength;
> chip->ecc.algo = NAND_ECC_BCH;
> - chip->ecc.read_page = micron_nand_read_page_on_die_ecc;
> - chip->ecc.write_page = micron_nand_write_page_on_die_ecc;
> + if (!chip->ecc.read_page)
> + chip->ecc.read_page = micron_nand_read_page_on_die_ecc;
> +
> + if (!chip->ecc.write_page)
> + chip->ecc.write_page = micron_nand_write_page_on_die_ecc;
That's wrong, if you don't want on-die ECC to be used, simply don't set
nand-ecc-mode to "on-die".
>
> if (ondie == MICRON_ON_DIE_MANDATORY) {
> chip->ecc.read_page_raw = nand_read_page_raw_notsupp;
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