linux-kernel - Re: [PATCH][mtd-next] mtd: spi-nor: remove redundant check on err

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Date:   Tue, 1 Aug 2017 18:33:17 +0200
From:   Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>
To:     Colin King <colin.king@...onical.com>,
        Marek Vasut <marek.vasut@...il.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Richard Weinberger <richard@....at>,
        linux-mtd@...ts.infradead.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][mtd-next] mtd: spi-nor: remove redundant check on err

Hi Colin,

Le 29/06/2017 à 19:50, Colin King a écrit :
> From: Colin Ian King <colin.king@...onical.com>
> 
> The variable err is not updated since the previous check on it, so
> the subsequent check on err is redundant and can be removed.
> 
> Detected by CoverityScan, CID#1448658 ("Logically dead code")
> 
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
>  drivers/mtd/spi-nor/spi-nor.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
> index 196b52f083ae..1296c1931591 100644
> --- a/drivers/mtd/spi-nor/spi-nor.c
> +++ b/drivers/mtd/spi-nor/spi-nor.c
> @@ -2307,9 +2307,6 @@ static int spi_nor_parse_sfdp(struct spi_nor *nor,
>  		default:
>  			break;
>  		}
> -
> -		if (err)
> -			goto exit;

Sorry but this was done on purpose to prepare the structure of the
source code so it's more easy to add later parsing of optional SFDP
tables such as the 4-byte address instruction set table or sector erase
map table.
At that time each case of the switch statement should update the value
of 'err'.

Best regards,

Cyrille
>  	}
>  
>  exit:
>