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From: David Wagner <david.wagner@free-electrons.com>
To: linux-mtd@lists.infradead.org
Subject: onenand_2x_program: optional or required ?
Date: Wed, 27 Apr 2011 17:18:37 +0200	[thread overview]
Message-ID: <4DB833CD.5020305@free-electrons.com> (raw)

Hi,

I have a board with a 2-planes OneNAND chip and, for the purpose of a
tutorial, I'm trying to put a squashfs rootfs on it.
I noticed that when the kernel doesn't have the
CONFIG_MTD_ONENAND_2X_PROGRAM option, it prints error like:

[    4.946594] SQUASHFS error: squashfs_read_data failed to read block
0x224366
[    4.954437] SQUASHFS error: Unable to read metadata cache entry [224366]
[    4.961791] SQUASHFS error: Unable to read inode 0xbf70504

and fails to mount the squashfs.


Can someone confirm or invalidate that this option really is necessary
when dealing with 2-planes onenands or is it merely meant to be an
improvement for supported chips ? Will flash-oriented filesystems also
have that problem w/o the option ?

I thought this option only affected write-functions but it seems it also
has an impact on reads.

Thanks
-- 
David Wagner, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com

                 reply	other threads:[~2011-04-27 15:18 UTC|newest]

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