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

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Message-ID: <48053985.8080702@gmail.com>
Date:	Wed, 16 Apr 2008 08:25:57 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>,
	Frans Pop <elendil@...net.nl>, 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

Alan Cox wrote:
>> Always loading generic or ata_generic used to be safe.  It's still 
>> pretty safe but not as much as before.  Nowadays, there are good number 
> 
> ata_generic is always safe unless you force it to grab every class
> device. By default it grabs only those devices we know obey the class
> interface well enough and for which we have no proper driver (usually
> because there are no documents). Ditto for ide/pci/generic.
> 
> The trickier one is pata_legacy, which tries to be smart and knows about
> the known exception so *should* always be safe. The old IDE legacy driver
> lacks these smarts so in some cases will do the wrong thing even if
> loaded last.

Right, I was thinking about drivers/ide/ide-generic.c which just grabs 
every known legacy IO ports.  This actually caused rather serious 
problems on some ATI controllers under certain configurations.  :-(

-- 
tejun
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