linux-kernel - Re: [PATCH v2] mtd: Fix mtdblock for >4GB MTD devices

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Message-ID: <254c5202-64cd-ddae-2e76-8db6a4486b80@gmail.com>
Date:   Mon, 27 Feb 2017 10:31:58 +0100
From:   Marek Vasut <marek.vasut@...il.com>
To:     Lepton Wu <ytht.net@...il.com>, dwmw2@...radead.org
Cc:     computersforpeace@...il.com, boris.brezillon@...e-electrons.com,
        richard@....at, cyrille.pitchen@...el.com,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mtd: Fix mtdblock for >4GB MTD devices

On 02/22/2017 03:15 AM, Lepton Wu wrote:
> Change to use loff_t instead of unsigned long in some functions
> to make sure mtdblock can handle offset bigger than 4G in 32 bits mode.
> 
> Signed-off-by: Lepton Wu <ytht.net@...il.com>
> ---
>  Changes in v2:
>   - Make the commit message more clearer and fix some format issues.
> 
>  drivers/mtd/mtdblock.c    | 35 ++++++++++++++++++-----------------
>  drivers/mtd/mtdblock_ro.c |  4 ++--
>  2 files changed, 20 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/mtd/mtdblock.c b/drivers/mtd/mtdblock.c
> index bb4c14f83c75..373c0edca803 100644
> --- a/drivers/mtd/mtdblock.c
> +++ b/drivers/mtd/mtdblock.c
> @@ -61,8 +61,8 @@ static void erase_callback(struct erase_info *done)
>  	wake_up(wait_q);
>  }
>  
> -static int erase_write (struct mtd_info *mtd, unsigned long pos,
> -			int len, const char *buf)
> +static int erase_write(struct mtd_info *mtd, loff_t pos, int len,
> +		       const char *buf)

Can the length be 64bit too now ?

[...]

-- 
Best regards,
Marek Vasut