linux-kernel - Re: [git patches] libata updates for 2.6.37

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Message-ID: <4CF506A6.4020200@kernel.org>
Date:	Tue, 30 Nov 2010 15:13:58 +0100
From:	Tejun Heo <tj@...nel.org>
To:	Kyle McMartin <kyle@...artin.ca>
CC:	Jeff Garzik <jeff@...zik.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-ide@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [git patches] libata updates for 2.6.37

Hello,

On 11/29/2010 07:07 PM, Kyle McMartin wrote:
> On Thu, Oct 21, 2010 at 09:23:02PM -0400, Jeff Garzik wrote:
>> 1) Link Power Management (LPM) rewrite
>>
> 
> Hrm, this is causing issues for me... When I resume from suspend on my
> thinkpad X201s I get:
> 
> [ 2454.478673] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> [ 2454.487736] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES)
> succeeded
> [ 2454.487742] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE
> filtered out
> [repeated a few times]
> [ 2454.492688] ata1.00: configured for UDMA/100
> [ 2454.506690] ata1.00: configured for UDMA/100
> [ 2454.506696] ata1: EH complete
> [...]
> [ 2455.097874] ata1.00: configured for UDMA/100
> [ 2455.097882] ata1: EH complete
> [...]
> [ 2455.386756] ata1.00: failed to enable DIPM, Emask 0x100
> [ 2455.386768] ata1: hard resetting link
> [...]
> [ 2455.847925] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
> [ 2455.849372] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES)
> succeeded
> [ 2455.849380] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE
> LOCK) filtered out
> [ditto]
> [ 2455.854171] ata1.00: configured for UDMA/100
> [ 2455.854480] ata1.00: failed to enable DIPM, Emask 0x100
> [ 2455.854484] ata1: disabling LPM on the link
> [ 2455.854489] ata1: limiting SATA link speed to 1.5 Gbps
> [ 2455.854494] ata1.00: limiting speed to UDMA/100:PIO3
> 
> Tejun, any ideas how I can debug this?

Hmm... DIPM commands are failing with AC_ERR_OTHER.  Other than DIPM
not being configured and speed capped at 1.5Gbps, the machine works
fine afterwards, right?  Are you up for applying debug patches?

Thanks.

-- 
tejun
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