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To:	Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc:	Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>,
	=?utf-8?B?6IOh5rSq?= =?utf-8?B?5YW1?= <huhb@lemote.com>,
	yanh@lemote.com, wuzhangjin@gmail.com, linux-mips@linux-mips.org,
	Ralf Baechle <ralf@linux-mips.org>,
	IDE/ATA development list <linux-ide@vger.kernel.org>,
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	loongson-dev@googlegroups.com, gnewsense-dev@nongnu.org,
	Nicholas Mc Guire <hofrat@hofr.at>,
	Liu Junliang <liujl@lemote.com>,
	Erwan Lerale <erwan@thiscow.com>
Subject: Re: [loongson-PATCH-v1 24/27] fixup for FUJITSU disk
From:	"Martin K. Petersen" <martin.petersen@oracle.com>
Organization: Oracle
References: <cover.1242855716.git.wuzhangjin@gmail.com>
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Date:	Mon, 25 May 2009 15:10:40 -0400
In-Reply-To: <4A1AEBF7.7040402@ru.mvista.com> (Sergei Shtylyov's message of
	"Mon, 25 May 2009 23:05:27 +0400")
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>>>>> "Sergei" == Sergei Shtylyov <sshtylyov@ru.mvista.com> writes:

>> Could you please explain the issue with platform specific code a bit
>> more?

>> Is it related to a cable detection by any chance?

Sergei>    I guess it's rdmsr()/wrmsr()...

Those are only used when the driver is explicitly loaded with
use_msr=1.  The default is to use PCI config space/VSA.

In any case I have yet to see a CS5536 system whose BIOS sets the cable
detection bit.  If that's the problem I guess we could add a quirk flag
to override the (lack of) BIOS setting.

-- 
Martin K. Petersen	Oracle Linux Engineering