linux-kernel - Re: ata_piix 2.6.25 sata failure

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Date:	Thu, 15 May 2008 16:57:41 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Matthieu CASTET <matthieu.castet@...rot.com>
CC:	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: ata_piix 2.6.25 sata failure

Matthieu CASTET wrote:
> Hi Tejun,
> 
> Matthieu CASTET wrote:
>> Hi,
>>
>> the 2.6.25 from debian fail to make work the second port. I got a 
>> "SATA link down (SStatus 61 Scontrol 30)" for ata2. ata1 got "SATA 
>> link up 3.0 Gbps (SStatus 13 SControl 30)"
>> The 2.6.24 works [1]. But some previous kernel (IRRC 2.6.18) had the 
>> same problem, ie ata2 doesn't work.
>>
> I saw you post a patch for macbook for correcting a bug with ata_ppiix.
> But it doesn't seem the same problem. I don't get 0 but others values.
> 
> May be a problem occurs when merging the master and slave status register ?
> 
> 
> Any idea how to debug this.
> 
> For information this happen on a HP Compaq dc7700p, and there no way on 
> the bios to change the controller to ahci mode

Yeah, I wrote a patch for that yesterday and forgot to actually send it. 
  Can you please test the attached patch?

-- 
tejun

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