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

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Date:	Fri, 02 Nov 2007 21:19:43 +0000
From:	Daniel Drake <dsd@...too.org>
To:	Tejun Heo <htejun@...il.com>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>, Jeff Garzik <jeff@...zik.org>,
	Jens Axboe <jens.axboe@...cle.com>,
	linux list <linux-kernel@...r.kernel.org>,
	linux-ide@...r.kernel.org, Albert Lee <albertcc@...ibm.com>
Subject: Re: "Fix ATAPI transfer lengths" causes CD writing regression

Tejun Heo wrote:
> Yeap, the SG command is fine.  The drive is being weird tho.  The
> allocation length field says 10 bytes, so it should just have
> transferred 10 bytes without causing HSM violation.
> 
> Can you please apply the attached patch and report what the kernel says
> after triggering the error condition?

Thanks for looking at this, the kernel now says:

<4>ata2.00: HSM violation: eh_analyze_tf: BUSY|DRQ
<3>ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
<3>ata2.00: cmd a0/00:00:00:0a:00/00:00:00:00:00/a0 tag 0 cdb 0x5a data 
10 in
<4>         res 58/00:02:00:0a:00/00:00:00:00:00/a0 Emask 0x2 (HSM 
violation)
<3>ata2.00: status: { DRDY DRQ }
<6>ata2: soft resetting link
<6>ata2.00: configured for UDMA/33
<6>ata2: EH complete

Daniel
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