From: Detlev Zundel <dzu@denx.de>
Date: Thu, 27 Jan 2011 17:18:28 +0100
Subject: [U-Boot] [PATCH 1/6] mtd: add writebufsize field to mtd_info
	struct
In-Reply-To: <1295540225-11083-1-git-send-email-holger.brunck@keymile.com>
	(Holger Brunck's message of "Thu, 20 Jan 2011 17:17:00 +0100")
References: <1295540225-11083-1-git-send-email-holger.brunck@keymile.com>
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To: u-boot@lists.denx.de

Hi Stefan,

do you have any comment on this series?  I delegated the patches to you
in patchwork already :)  No seriously, the patches look sane and are in
accordance to what is done in Linux....

> This field will be used to indicate the write buffer size
> of the MTD device. UBI will set it's minimal I/O unit size
> (min_io_size) to the indicated write buffer size. By this
> change we intend to fix failed recovery of UBIFS partitions
> we currently observe on NOR flash when mounting the partition
> after unclean unmount.
>
> Currently the min_io_size is set to mtd->writesize (which is 1
> byte for NOR flash). But flash programming is often done from
> prepared write buffer containing multiple bytes and is performed
> in one programming operation which could be interrupted by a power
> cut or a system reset causing corrupted (partially written) areas
> in a flash sector. Knowing the size of potentially corrupted areas
> UBIFS scanning and recovery algorithms are able to perform
> successful recovery.
>
> Signed-off-by: Holger Brunck <holger.brunck@keymile.com>

Thanks
  Detlev

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