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From: John Clark <clarkjc@runbox.com>
To: Tejun Heo <tj@kernel.org>
Cc: Jeff Garzik <jgarzik@pobox.com>,
	linux-ide@vger.kernel.org, Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: Interoperability problem with Quantum CD72SH SATA tape drive and libata
Date: Mon, 06 Oct 2008 15:36:55 -0400	[thread overview]
Message-ID: <48EA68D7.3060701@runbox.com> (raw)
In-Reply-To: <48E7D5CD.2000003@kernel.org>

Tejun Heo wrote:
> Can you please test the attached patch?
>
> Alan, John Clark is reporting that the above tape drive chokes on odd
> byte PIO transfer, so the default condition check (qc->nbytes & 15) in
> atapi_check_dma() breaks the SATA tape drive, so there's always one
> which breaks the other way around.  :-(
>
> For the time being, I think the horkage should do.  I was wondering
> whether you still think we should lift the default mod16 check in
> atapi_check_dma().
>
> Thanks.
>   

Tejun,

I have tested the patch you supplied.  It works, as expected.

Thanks.

- John

  reply	other threads:[~2008-10-06 19:37 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-27 20:25 Interoperability problem with Quantum CD72SH SATA tape drive and libata John Clark
2008-10-01  3:21 ` Tejun Heo
2008-10-01 23:13   ` John Clark
2008-10-04 20:45     ` Tejun Heo
2008-10-06 19:36       ` John Clark [this message]
2008-10-07  1:29         ` Tejun Heo

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