[8683] in linux-scsi channel archive
Re: sc_data_direction -- will we require it?
daemon@ATHENA.MIT.EDU (=?ISO-8859-1?Q?G=E9rard_Roudier?=)
Wed Apr 19 16:11:22 2000
Date: Wed, 19 Apr 2000 21:38:04 +0200 (CEST)
From: =?ISO-8859-1?Q?G=E9rard_Roudier?= <groudier@club-internet.fr>
To: Douglas Gilbert <dgilbert@interlog.com>
Cc: Eric Youngdale <eric@andante.org>,
Matthew Dharm <mdharm-scsi@one-eyed-alien.net>,
The Linux SCSI list <linux-scsi@vger.rutgers.edu>
In-Reply-To: <38FD3AD7.17B4E377@interlog.com>
Message-ID: <Pine.LNX.4.10.10004192123050.1044-100000@linux.local>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=ISO-8859-1
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On Wed, 19 Apr 2000, Douglas Gilbert wrote:
> The sym/ncr53cxx drivers do nasty things on the PCI bus if the
> data_direction flag is wrong (crash??) but it will safely cope
Really?
Was should happen is the following:
- ncr53c8xx should hang due to looping with phase mismatch condition.
timeout should then trigger a reset and restart operations.
- sym53c8xx should eat the wrong data, throw them away and state
EXTRANEOUS DATA DISCARDED.
And since sym-2.X series (for Linux and FreeBSD) are planned to also
support early NCR chips, only sym53c8xx behaviour is to be considered for
the long run.
Gérard.
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