From: Jeff Garzik <jgarzik@pobox.com>
To: Tejun Heo <htejun@gmail.com>,
Bartlomiej Zolnierkiewicz <bzolnier@elka.pw.edu.pl>
Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org,
Alan Cox <alan@lxorguk.ukuu.org.uk>, Tejun Heo <tj@home-tj.org>
Subject: Re: [rfc][patch] ide: fix unneeded LBA48 taskfile registers access
Date: Mon, 07 Feb 2005 03:58:08 -0500 [thread overview]
Message-ID: <42072DA0.8050302@pobox.com> (raw)
In-Reply-To: <4206F2E5.7020501@gmail.com>
FWIW, there are two limitations of libata in this area:
1) ISTR some PATA vendor-specific commands have a very specific set of
input and output registers to use, and input/output sets of registers
may differ from each other.
2) libata is lazy, and just reads registers in "groups": the
lbaH/M/L/nsect registers, the device register, etc.
next prev parent reply other threads:[~2005-02-07 8:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-06 22:54 [rfc][patch] ide: fix unneeded LBA48 taskfile registers access Bartlomiej Zolnierkiewicz
2005-02-07 4:47 ` Tejun Heo
2005-02-07 8:58 ` Jeff Garzik [this message]
2005-02-07 8:59 ` Bartlomiej Zolnierkiewicz
2005-02-10 0:01 ` Tejun Heo
2005-02-10 0:24 ` Bartlomiej Zolnierkiewicz
2005-02-10 0:52 ` Tejun Heo
2005-02-10 1:31 ` Bartlomiej Zolnierkiewicz
2005-02-10 2:04 ` Jeff Garzik
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