linux-kernel - Re: [PATCH v2 05/15] mtd: nand: add manufacturer specific initialization/detection steps

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Date:	Sat, 18 Jun 2016 14:34:00 +0200
From:	Richard Weinberger <richard@....at>
To:	Boris Brezillon <boris.brezillon@...e-electrons.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>,
	linux-mtd@...ts.infradead.org, Hans de Goede <hdegoede@...hat.com>,
	linux-kernel@...r.kernel.org, Aleksei Mamlin <mamlinav@...il.com>
Subject: Re: [PATCH v2 05/15] mtd: nand: add manufacturer specific
 initialization/detection steps



Am 18.06.2016 um 13:34 schrieb Boris Brezillon:
> On Sat, 18 Jun 2016 11:23:01 +0200
> Richard Weinberger <richard@....at> wrote:
> 
>> diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
>> index 55f3ab8..aadebe7 100644
>> --- a/drivers/mtd/nand/nand_base.c
>> +++ b/drivers/mtd/nand/nand_base.c
>> @@ -3703,6 +3703,10 @@ static int nand_detect(struct nand_chip *chip, struct nand_flash_dev *type)
>>
>>  	chip->manufacturer.ops = nand_manuf_ids[maf_idx].ops;
>>
>> +	if (!chip->manufacturer.ops)
>> +		/* assign no operations */
>> +		chip->manufacturer.ops = nand_manuf_ids[0].ops;
>> +
> 
> BTW, this is wrong, the manufacturer id code is not the index of the
> nand_manuf_ids[] table ;). If we go for this option, we should probably
> declare no_ops in nand_base.c and assign it here:
> 

Oh, yes. You are right.
Anyway, I think having a wrapper is also a good solution.

Thanks,
//richard