linux-kernel - Re: [LINUX PATCH v18 1/2] mtd: rawnand: nand_micron: Do not over write driver's read_page()/write

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Message-ID: <20190716093137.3d8e8c1f@pc-375.home>
Date:   Tue, 16 Jul 2019 09:31:37 +0200
From:   Boris Brezillon <boris.brezillon@...labora.com>
To:     Naga Sureshkumar Relli <naga.sureshkumar.relli@...inx.com>
Cc:     miquel.raynal@...tlin.com, bbrezillon@...nel.org, richard@....at,
        dwmw2@...radead.org, computersforpeace@...il.com,
        marek.vasut@...il.com, vigneshr@...com,
        yamada.masahiro@...ionext.com, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org, michal.simek@...inx.com,
        svemula@...inx.com, nagasuresh12@...il.com
Subject: Re: [LINUX PATCH v18 1/2] mtd: rawnand: nand_micron: Do not over
 write driver's read_page()/write_page()

On Mon, 15 Jul 2019 23:30:51 -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>
> ---
> Changes in v18
>  - None
> ---
>  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;
>  

Seriously?! I told you this was inappropriate and you keep sending this
patch. So let's make it clear:

Nacked-by: Boris Brezillon <boris.brezillon@...labora.com>

Fix your controller driver instead of adding hacks to the Micron logic!

>  		if (ondie == MICRON_ON_DIE_MANDATORY) {
>  			chip->ecc.read_page_raw = nand_read_page_raw_notsupp;