linux-kernel - Re: [PATCH 1/2] mtd: Annotate implicit fall through in nand_command/nand_command

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Date:   Fri, 25 Jan 2019 13:36:19 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Mathieu Malaterre <malat@...ian.org>
Cc:     Boris Brezillon <bbrezillon@...nel.org>,
        Richard Weinberger <richard@....at>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] mtd: Annotate implicit fall through in
 nand_command/nand_command_lp

Hi Mathieu,

Mathieu Malaterre <malat@...ian.org> wrote on Wed, 16 Jan 2019 20:50:03
+0100:

> There is a plan to build the kernel with -Wimplicit-fallthrough and
> these places in the code produced warnings (W=1).
> 
> This commit removes the following warnings:
> 
>   drivers/mtd/nand/raw/nand_legacy.c:332:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
>   drivers/mtd/nand/raw/nand_legacy.c:483:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
> 
> Signed-off-by: Mathieu Malaterre <malat@...ian.org>
> ---
>  drivers/mtd/nand/raw/nand_legacy.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/nand/raw/nand_legacy.c b/drivers/mtd/nand/raw/nand_legacy.c
> index 43575943f13b..f2526ec616a6 100644
> --- a/drivers/mtd/nand/raw/nand_legacy.c
> +++ b/drivers/mtd/nand/raw/nand_legacy.c
> @@ -331,6 +331,7 @@ static void nand_command(struct nand_chip *chip, unsigned int command,
>  		 */
>  		if (column == -1 && page_addr == -1)
>  			return;
> +		/* fall through */
>  
>  	default:
>  		/*
> @@ -483,7 +484,7 @@ static void nand_command_lp(struct nand_chip *chip, unsigned int command,
>  		chip->legacy.cmd_ctrl(chip, NAND_CMD_NONE,
>  				      NAND_NCE | NAND_CTRL_CHANGE);
>  
> -		/* This applies to read commands */
> +		/* fall through - This applies to read commands */
>  	default:
>  		/*
>  		 * If we don't have access to the busy pin, we apply the given

Applied to nand/next with the subject prefix being "mtd: rawnand:"


Thanks,
Miquèl