From: Artem Bityutskiy <dedekind@infradead.org>
To: Amit Kumar Sharma <amitsharma.9@samsung.com>
Cc: Kyungmin Park <kmpark@infradead.org>,
Kyungmin Park <kyungmin.park@samsung.com>,
lkml <linux-kernel@vger.kernel.org>,
apgmoorthy <moorthy.apg@samsung.com>,
linux-mtd@lists.infradead.org,
David Woodhouse <dwmw2@infradead.org>
Subject: Re: [ANNOUNCE] [PATCH] [MTD] Flex-OneNAND MTD Driver available.
Date: Fri, 26 Sep 2008 11:19:36 +0300 [thread overview]
Message-ID: <1222417176.5012.17.camel@sauron> (raw)
In-Reply-To: <A09E9029F2344F78959A3E36179C468E@sisodomain.com>
On Fri, 2008-09-26 at 13:31 +0530, Amit Kumar Sharma wrote:
> Hi Artem
>
> we have following erro message if we maintain 64 bytes
> eccpos.
>
> /flash_eraseall -j /dev/mtd4
> ./flash_eraseall: /dev/mtd4: unable to get NAND oobinfo
>
> ./nandwrite -j /dev/mtd2 /jffs2.img
> MEMSETOOBSEL: Inappropriate ioctl for device
>
> but i think as OneNAND has hw ecc controller so Jffs2 will
> not face any problem
> still i think mtd should consider for 128 bytes eccpos for
> 4K page size.
Well, anyway, in Linux ABI is a holy cow, you cannot change it.
That is a tough rule. Old user-space binaries have to always
works.
Thus you may do one of:
1. Invent a new ioctl for 4KiB page NANDs
2. Add sysfs support
3. Just do not expose whole OOB as Kyungmin suggested
But I think assume dwmw2 would need to comment on this and
tell which approach would agree on.
--
Best regards,
Artem Bityutskiy (Битюцкий Артём)
WARNING: multiple messages have this Message-ID (diff)
From: Artem Bityutskiy <dedekind@infradead.org>
To: Amit Kumar Sharma <amitsharma.9@samsung.com>
Cc: Kyungmin Park <kmpark@infradead.org>,
apgmoorthy <moorthy.apg@samsung.com>,
linux-mtd@lists.infradead.org,
Kyungmin Park <kyungmin.park@samsung.com>,
lkml <linux-kernel@vger.kernel.org>,
David Woodhouse <dwmw2@infradead.org>
Subject: Re: [ANNOUNCE] [PATCH] [MTD] Flex-OneNAND MTD Driver available.
Date: Fri, 26 Sep 2008 11:19:36 +0300 [thread overview]
Message-ID: <1222417176.5012.17.camel@sauron> (raw)
In-Reply-To: <A09E9029F2344F78959A3E36179C468E@sisodomain.com>
On Fri, 2008-09-26 at 13:31 +0530, Amit Kumar Sharma wrote:
> Hi Artem
>
> we have following erro message if we maintain 64 bytes
> eccpos.
>
> /flash_eraseall -j /dev/mtd4
> ./flash_eraseall: /dev/mtd4: unable to get NAND oobinfo
>
> ./nandwrite -j /dev/mtd2 /jffs2.img
> MEMSETOOBSEL: Inappropriate ioctl for device
>
> but i think as OneNAND has hw ecc controller so Jffs2 will
> not face any problem
> still i think mtd should consider for 128 bytes eccpos for
> 4K page size.
Well, anyway, in Linux ABI is a holy cow, you cannot change it.
That is a tough rule. Old user-space binaries have to always
works.
Thus you may do one of:
1. Invent a new ioctl for 4KiB page NANDs
2. Add sysfs support
3. Just do not expose whole OOB as Kyungmin suggested
But I think assume dwmw2 would need to comment on this and
tell which approach would agree on.
--
Best regards,
Artem Bityutskiy (Битюцкий Артём)
next prev parent reply other threads:[~2008-09-26 8:19 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-19 12:31 [ANNOUNCE] [PATCH] [MTD] Flex-OneNAND MTD Driver available AYYANARPONNUSAMY GANGHEYAMOORTHY
2008-09-22 7:11 ` Kyungmin Park
2008-09-22 7:11 ` Kyungmin Park
2008-09-24 12:35 ` apgmoorthy
2008-09-24 12:35 ` apgmoorthy
2008-09-26 0:31 ` Kyungmin Park
2008-09-26 0:31 ` Kyungmin Park
2008-09-26 4:51 ` Artem Bityutskiy
2008-09-26 4:51 ` Artem Bityutskiy
2008-09-26 5:30 ` Kyungmin Park
2008-09-26 5:30 ` Kyungmin Park
2008-09-26 6:26 ` Artem Bityutskiy
2008-09-26 6:26 ` Artem Bityutskiy
2008-09-26 8:01 ` Amit Kumar Sharma
2008-09-26 8:19 ` Artem Bityutskiy [this message]
2008-09-26 8:19 ` Artem Bityutskiy
2008-09-29 9:28 ` apgmoorthy
2008-09-29 9:28 ` apgmoorthy
2008-10-09 22:57 ` Kyungmin Park
2008-10-09 22:57 ` Kyungmin Park
[not found] ` <1224331498.6770.1362.camel@macbook.infradead.org>
2008-10-20 5:04 ` apgmoorthy
2008-10-20 5:54 ` Artem Bityutskiy
2008-10-22 6:43 ` apgmoorthy
2008-10-24 14:26 ` Adrian Hunter
2008-11-03 10:32 ` apgmoorthy
2008-11-05 8:52 ` Adrian Hunter
2008-11-07 14:26 ` Rohit
2008-11-10 15:20 ` Adrian Hunter
2008-11-11 3:31 ` Amit Kumar Sharma
2008-11-11 7:28 ` Adrian Hunter
2008-11-12 5:43 ` Rohit
2008-10-20 10:53 ` David Woodhouse
2008-10-21 5:22 ` apgmoorthy
2008-10-10 6:34 ` David Woodhouse
2008-10-10 6:34 ` David Woodhouse
-- strict thread matches above, loose matches on Subject: below --
2008-10-16 4:16 apgmoorthy
2008-10-16 4:28 ` Kyungmin Park
2008-10-16 4:28 ` Kyungmin Park
2008-10-20 3:01 ` Kyungmin Park
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