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

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Message-ID: <480419B6.1050309@gmail.com>
Date:	Tue, 15 Apr 2008 11:57:58 +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)

Paul Collins wrote:
> Tejun Heo <htejun@...il.com> writes:
> 
>> That's very strange.  The link is in slumber powersave mode.  I wonder
>> how it got there.  Can you please try the attached patch and report
>> resulting boot log?

> ata2: XXX SCR WRITE master 2:300
> ata2: XXX SCR WRITE slave 2:300

This is the only write to the SCR control reg and the driver is 
*inhibiting* transition to either powersave mode.

> ata2: soft resetting link
> ata2: SATA link down (SStatus 611 SControl 300)

Yet, the device is in slumber ps mode.

> ata2: XXX SCR WRITE master 1:4050000
> ata2: XXX SCR WRITE slave 1:4050000

This is to clear SCR status.

Can you please do the followings?

1. With the previous patch applied, do cold reboot.  Power off the 
machine.  If possible turn off the master switch on the power supply. 
What ten secs.  Boot and see if anything is different.

2. If that doesn't make any difference, with the previous patch backed 
out (patch -R -p1) and the new patch attached here applied, do cold boot 
and post the log.

Thanks.

-- 
tejun

View attachment "ata_piix-debug-1.patch" of type "text/x-patch" (1840 bytes)