linux-kernel - Re: AHCI driver problem on ICH (Re: AHCI driver problem on SB700/SB800 w/ Acer Ferrari One)

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Message-Id: <201105131856.44250.rjw@sisk.pl>
Date:	Fri, 13 May 2011 18:56:44 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	"Michael Leun" <lkml20100708@...ton.leun.net>
Cc:	Tejun Heo <tj@...nel.org>, linux-ide@...r.kernel.org,
	Linux PM mailing list <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: AHCI driver problem on ICH (Re: AHCI driver problem on SB700/SB800 w/ Acer Ferrari One)

On Friday, May 13, 2011, Michael Leun wrote:
> On Thu, 12 May 2011 00:25:34 +0200
> "Rafael J. Wysocki" <rjw@...k.pl> wrote:
> 
> > There seems to be a problem on my Acer box which is related to DIPM
> > and switching the power source.  Namely, when I detach the AC adapter
> > from the machine, the disk (which is an Intel SSD) freezes for a
> > while and something like this appears in dmesg:
> [...]
> 
> Since updating to 2.6.39-rc7 (from 2.6.38.x) I have similar problems
> with two notebooks using Intel ICH:
> 
> Acer PTZ1825
> 00:1f.2 SATA controller: Intel Corporation ICH9M/M-E SATA AHCI
> Controller (rev 03) (prog-if 01 [AHCI 1.0]) Subsystem: Acer
> Incorporated [ALI] Device 0300 Flags: bus master, 66MHz, medium devsel,
> latency 0, IRQ 42 I/O ports at 30e8 [size=8]
>         I/O ports at 30fc [size=4]
>         I/O ports at 30e0 [size=8]
>         I/O ports at 30f8 [size=4]
>         I/O ports at 3020 [size=32]
>         Memory at d4504000 (32-bit, non-prefetchable) [size=2K]
>         Capabilities: [80] MSI: Enable+ Count=1/16 Maskable- 64bit-
>         Capabilities: [70] Power Management version 3
>         Capabilities: [a8] SATA HBA v1.0
>         Capabilities: [b0] PCI Advanced Features
>         Kernel driver in use: ahci
> 
> 
> Dell Latitude E6510
> 00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset
> 6 port SATA AHCI Cont roller (rev 05) (prog-if 01 [AHCI 1.0])
>         Subsystem: Dell Device 040b
>         Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 41
>         I/O ports at 8090 [size=8]
>         I/O ports at 8080 [size=4]
>         I/O ports at 8070 [size=8]
>         I/O ports at 8060 [size=4]
>         I/O ports at 8020 [size=32]
>         Memory at e9640000 (32-bit, non-prefetchable) [size=2K]
>         Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
>         Capabilities: [70] Power Management version 3
>         Capabilities: [a8] SATA HBA v1.0
>         Capabilities: [b0] PCI Advanced Features
>         Kernel driver in use: ahci
> 
> Patch not tried yet (do not know / not looked into yet where to change
> for this chipset).
> 
> Seems to be a 2.6.39-rcX regression?

Well, that very well may be the case.

Can you verify that it didn't happen with 2.6.38 and earlier?

Rafael
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