From: Pat LaVarre <p.lavarre@ieee.org>
To: Jeff Garzik <jgarzik@pobox.com>
Cc: linux-ide@vger.kernel.org,
Bartlomiej Zolnierkiewicz <B.Zolnierkiewicz@elka.pw.edu.pl>
Subject: Re: [PATCH] libata-core when not ata_id_use_dmadir despite yesSili conI mage
Date: 15 May 2004 10:46:28 -0600 [thread overview]
Message-ID: <1084639588.3070.9.camel@patibmrh9> (raw)
In-Reply-To: <200405151838.15898.bzolnier@elka.pw.edu.pl>
> > We can do so for our development here, but a better solution based on
> > released parts will need to be found...
>
> Do you know of some way to detect SI 3611CT80 1.4?
I don't.
Jeff G, do you?
> > And this language makes sense, since it is unknown what all those cheap
> > old ATAPI devices will do. It's too risky to simply set this bit for
> > all ATAPI devices, without lots of testing.
>
> OK
Yes.
> > According to ATA/ATAPI7,
> >
> > A device that does not support the DMADIR feature may abort a
> > command if the DMADIR bit is set to 1.
I believe this is a t13.org change that is NOT backwards-compatible,
analogous to the theft I remember of op xEC Identify "word" 128.
I will double-check ATA/ATAPI 4/ 5/ 6 and report the relevant language
here.
Pat LaVarre
prev parent reply other threads:[~2004-05-15 16:46 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-15 14:20 [PATCH] libata-core when not ata_id_use_dmadir despite yes SiliconI mage Pat LaVarre
2004-05-15 14:33 ` Bartlomiej Zolnierkiewicz
2004-05-15 16:15 ` Jeff Garzik
2004-05-15 16:38 ` Bartlomiej Zolnierkiewicz
2004-05-15 16:39 ` Jeff Garzik
2004-05-15 16:46 ` Pat LaVarre [this message]
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