linux-kernel - Re: No IDE drivers loaded for Toshiba Satellite 320 CDS

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Date:	Thu, 17 Apr 2008 00:24:37 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Frans Pop <elendil@...net.nl>
Cc:	Tejun Heo <htejun@...il.com>,
	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Subject: Re: No IDE drivers loaded for Toshiba Satellite 320 CDS


> The problem here is determining whether a machine is "legacy" or not.
> So far in this discussion I've seen no suggestions how to do that (except 
> maybe for my test whether /sys/bus/isa is present), which would mean asking 
> _all_ users, and that's a damned ugly option.

Libata pata_legacy handles this itself for all known cases using the
ruleset

IF any PCI device -> no PATA legacy scans beyond IDE0/IDE1
IF any PCI IDE in legacy compat mode  -> No pata_legacy bind to that port
IF CS55x0 or MPIIX -> read the chipset magic [these are the obscure 'not
PCI but not ISA' specials]

Alan
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