linux-kernel - Re: [PATCH] Make the mtdblock read/write skip the bad nand sector

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Message-ID: <CAFLxGvyLEEyc2pFJXFU+aLb-ma3EraHLbdFwMm7bxAXJo9M=jw@mail.gmail.com>
Date:	Fri, 22 Nov 2013 09:14:52 +0100
From:	Richard Weinberger <richard.weinberger@...il.com>
To:	Hans Zhang <zhanghonghui@...ofidei.com>
Cc:	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Richard Genoud <richard.genoud@...il.com>,
	zhouguangming@...ofidei.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-mtd <linux-mtd@...ts.infradead.org>,
	David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH] Make the mtdblock read/write skip the bad nand sector

On Fri, Nov 22, 2013 at 3:10 AM, Hans Zhang <zhanghonghui@...ofidei.com> wrote:
> On 2013/11/22 9:52, Ezequiel Garcia wrote:
>> On Fri, Nov 22, 2013 at 09:22:43AM +0800, Hans Zhang wrote:
>>> On 2013/11/21 18:59, Richard Genoud wrote:
>>>
>>> Here's my scenario, I want to write nand through mtdblock by dd command
>> You could get some better support by explaining why do you want to write
>> to a NAND through mtdblock. It sounds a bit ackward to me, but I'm sure
>> you have a good reason for it!
>>
>> Let's hear it :-)
>
> Thanks for your reply.
> This is for my embed system upgrade, I reserved one nand partition for filesystem
> environment which will load to DDR while uboot booting.
> This filesystem.uboot file should be able to read both by uboot and kernel, and
> maybe written by uboot and kernel. There will be no filesystems upon the nand in
> case the loader may not support some filesystem types while uboot booting.
>
> Seems that the trimmed environment of OS has get rid of the mtd-tools, So the dd
> command was the most convenience tools to use by hand.

Instead of fixing your userspace you mess around int the kernel?
Sorry, that's a no-no.

-- 
Thanks,
//richard
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