linux-kernel - Re: ata2: SATA link down (SStatus 611 SControl 300)

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Message-ID: <4805496E.7000306@gmail.com>
Date:	Wed, 16 Apr 2008 09:33:50 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Paul Collins <paul@...ly.ondioline.org>
CC:	Jeff Garzik <jeff@...zik.org>, linux-kernel@...r.kernel.org
Subject: Re: ata2: SATA link down (SStatus 611 SControl 300)

Tejun Heo wrote:
> Paul Collins wrote:
>> Tejun Heo <htejun@...il.com> writes:
>>
>>> Paul Collins wrote:
>>>> I found a setting labelled "SATA Power Management".  It was set to
>>>> "Enable".  When I set it to "Disable", 2.6.25-rc9 detected the optical
>>>> drive.
>>> This can't be something changed between 2.6.24 and 2.6.25-rc9.  Can
>>> you please double check that?
>>
>> I double-checked as follows:
>>
>> * Verified "SATA Power Management" set to "Enable"
>> * Verified optical device present in 2.6.24.3
>> * Verified optical device not present in 2.6.25-rc9
> 
> Thanks for checking.  Yeah, on the second though, ata_piix as of 
> 2.6.24.3 doesn't have SCR access at all, so it would have just worked. 
> Maybe what's necessary is more refined link onlineness test.  I'll prep 
> a patch.
> 

Can you please try the attached patch?  Thanks.

-- 
tejun

View attachment "ata_piix-debug-3.patch" of type "text/x-patch" (1189 bytes)