linux-kernel - Re: [PATCH] Add IDE mode support for SB600 SATA

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Message-ID: <45679FC5.8050304@gmail.com>
Date:	Sat, 25 Nov 2006 10:43:33 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Alan <alan@...rguk.ukuu.org.uk>
CC:	Conke Hu <conke.hu@....com>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...l.org>, Jeff Garzik <jeff@...zik.org>,
	arjan@...radead.org
Subject: Re: [PATCH] Add IDE mode support for SB600 SATA

Alan wrote:
>> * Unlike Jmicron's case, this doesn't affect PCI bus scan.  Actually, it 
>> does change class code but that's not as disruptive as Jmicron's case 
>> and as long as ahci ignores class code, it doesn't really matter. 
>> Driver can be chosen by changing loading order - this is both plus and 
>> minus.
> 
> The load order is basically undefined. You want AHCI so we should do
> this early. That means either putting the same gunk all over the kernel
> (drivers/ide, drivers/ata/*ati* drivers/ata/ahci) or in one place.
>  
>> * As Arjan pointed out, that unlock-modify-lock sequence should be done 
>> on resume too.  
> 
> The infrastructure for this is already handled by the pci resume quirk
> patches I sent. 

As long as resume is properly handled, no problem.

Thanks.

-- 
tejun
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