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

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Date:   Tue, 01 Aug 2017 19:00:06 +0200
From:   walter harms <wharms@....de>
To:     Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>
CC:     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, kernel-janitors@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH][mtd-next] mtd: spi-nor: remove redundant check on err



Am 01.08.2017 18:33, schrieb Cyrille Pitchen:
> 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,
> 

This is hard to guess, could you add a comment so the next well meaning person
has a chance to know that this is onn purpose ?

re,
 wh


> Cyrille
>>  	}
>>  
>>  exit:
>>
> 
> --
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