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 for linux-mtd@lists.infradead.org; Wed, 22 Jun 2016 14:05:41 +0000
Subject: Re: [RFC] Raising the UBI version
To: Boris Brezillon <boris.brezillon@free-electrons.com>
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 Artem Bityutskiy <dedekind1@gmail.com>, Alexander Kaplan
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From: Richard Weinberger <richard@nod.at>
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Date: Wed, 22 Jun 2016 16:05:17 +0200
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Am 22.06.2016 um 16:01 schrieb Boris Brezillon:
> On Wed, 22 Jun 2016 15:54:34 +0200
> Richard Weinberger <richard@nod.at> wrote:
> 
>> Am 22.06.2016 um 14:43 schrieb Boris Brezillon:
>>> Why do we need to hardcode /sys/class/ubi/version to 1? We just need to
>>> update the mtd-utils to support version 2. Am I missing something?  
>>
>> We don't want to break existing userspace.
>> Why should ubimkvol or ubiattach fail on a system with SLC NAND and
>> CONFIG_MTD_UBI_CONSOLIDATE=y?
> 
> But version won't be set to 2 in this case. If it's an SLC NAND we
> don't need to use UBI version 2, do we.

/sys/class/ubi/version is the version of the UBI implementation,
not the version of the attached UBI image.
It will the here as soon you load the UBI module.

Thanks,
//richard