linux-kernel - Re: "Fix ATAPI transfer lengths" causes CD writing regression

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Message-ID: <20071031124908.19de7833@the-village.bc.nu>
Date:	Wed, 31 Oct 2007 12:49:08 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	Daniel Drake <dsd@...too.org>,
	linux list <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org
Subject: Re: "Fix ATAPI transfer lengths" causes CD writing regression

> > Would need to double check the SCSI specificatons to be sure but I think
> > you are asking for less data than the drive wishes to provide. You
> > aren't allowed to do that with ATA.
> 
> ide-cd handles this by throwing the excess away, which I think is the
> sane way to do this.

It also fails for some cases because the controller snoops the length
information in the packet command.

Alan
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