linux-kernel - Re: [PATCH v2 6/7] mtd: nand: raw: make BBT code more generic

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Date:   Thu, 17 Nov 2016 14:19:29 +0800
From:   Peter Pan <peterpansjtu@...il.com>
To:     Boris Brezillon <boris.brezillon@...e-electrons.com>
Cc:     Richard Weinberger <richard@....at>, linux-mtd@...ts.infradead.org,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
        linux-kernel@...r.kernel.org,
        "peterpandong@...ron.com" <peterpandong@...ron.com>
Subject: Re: [PATCH v2 6/7] mtd: nand: raw: make BBT code more generic

Hi Boris,

On Sun, Oct 16, 2016 at 10:35 PM, Boris Brezillon
<boris.brezillon@...e-electrons.com> wrote:
> BBT support is currently tightly tied to raw NAND, though this is the kind
> of code we could share across all NAND based devices, no matter what
> physical interface is to communicate with the NAND chip.
>
> Make BBT code interface agnostic by replacing all occurrence of
> struct nand_chip by struct nand_device, and move functions that are
> specific to raw NANDs to drivers/mtd/nand/rawnand/nand_base.c.
>
> Signed-off-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
> ---
>  drivers/mtd/nand/raw/nand_base.c |  78 ++++-
>  drivers/mtd/nand/raw/nand_bbt.c  | 609 ++++++++++++++++++---------------------
>  include/linux/mtd/nand.h         |   8 +
>  include/linux/mtd/rawnand.h      |   4 -
>  4 files changed, 361 insertions(+), 338 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
> index b86f4a1bfbe1..4930b3569de9 100644
> --- a/drivers/mtd/nand/raw/nand_base.c
> +++ b/drivers/mtd/nand/raw/nand_base.c
> @@ -471,7 +471,7 @@ static int nand_block_markbad_lowlevel(struct mtd_info *mtd, loff_t ofs)
>
>         /* Mark block bad in BBT */
>         if (chip->bbt) {

Should be "if (!nand->bbt.bbt)".

> -               res = nand_markbad_bbt(mtd, ofs);
> +               res = nand_markbad_bbt(mtd_to_nand(mtd), ofs);
>                 if (!ret)
>                         ret = res;
>         }