[7190] in linux-scsi channel archive
Re: Fixing SCSI Layer
daemon@ATHENA.MIT.EDU (Alan Cox)
Wed Sep 8 17:54:51 1999
To: groudier@club-internet.fr (Gerard Roudier)
Date: Wed, 8 Sep 1999 22:44:20 +0100 (BST)
Cc: mark@iphase.com, linux-scsi@vger.rutgers.edu
In-Reply-To: <Pine.LNX.3.95.990908212649.499B-100000@localhost> from "Gerard Roudier" at Sep 8, 99 09:35:25 pm
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
> This flaw in Linux-SCSI requires driver to be able to handle any transfer
> direction required by a device for a command. Usually, the direction is
> enforced only for common opcodes as READ*/WRITE* and friends. For non
> usual commands the driver/controller pair must wait the first data phase
> asked by the device to know about the transfer direction.
Many drivers cant wait for the phase to decide. They have to use tables or
be told
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