linux-kernel - Re: [PATCH 5/5] falconide/q40ide: add ->atapi_*put_bytes and ->ata_*put

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Message-ID: <20080401091240.420b3aeb@core>
Date:	Tue, 1 Apr 2008 09:12:40 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Michael Schmitz <schmitz@...ragd.biophys.uni-duesseldorf.de>
Cc:	Roman Zippel <zippel@...ux-m68k.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	linux-ide@...r.kernel.org,
	Linux Kernel Development <linux-kernel@...r.kernel.org>,
	Linux/m68k <linux-m68k@...r.kernel.org>,
	Michael Schmitz <schmitz@...ian.org>
Subject: Re: [PATCH 5/5] falconide/q40ide: add ->atapi_*put_bytes and
 ->ata_*put_data methods

> Sorry for the mess in core code - ist there any other way for only driveid
> and packet data getting swapped? And can we actually use the device mapper
> to byte-swap the root partition?

Device Mapper can certainly support that if needed - I don't think it has
a swab target currently but byteswapped is just a very bad crypto
algorithm so you can use dm crypt target as a reference. Might not be a
bad idea just to make the media shareable.

The only other way I can see to do it would be to split the ATA transfer
functions into two sets one for media data and one for other stuff - but
then how do you handle iso9660 cd ?

Alan
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