linux-kernel - Re: INTEL_MEI_ME=y breaks suspend on 3.10-rc3

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Date:	Tue, 18 Jun 2013 20:27:16 +0200
From:	Stefan Seyfried <stefan.seyfried@...glemail.com>
To:	Tomas Winkler <tomas.winkler@...el.com>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: Re: INTEL_MEI_ME=y breaks suspend on 3.10-rc3

Hi Tomas,

executive summary: it is not fixed in 3.10rc6

Am 03.06.2013 20:09, schrieb Tomas Winkler:
>>> Or, to be more precise: it breaks resume.
>>>
>>> The machine seems to lock up hard after resume, then after a few seconds
>>> it panics (caps lock blinking).
>>>
>>> Reproduced on ThinkPad X200s
>>>
>>> 00:03.0 0780: 8086:2a44 (rev 07)
>>> Intel Corporation Mobile 4 Series Chipset MEI Controller
>>>
>>> Debugged with "init=/bin/bash no_console_suspend", I see lots of errors
>>> from the mei_me driver, then finally the panic (some overflow maybe?).
>>>
>>> Unbinding the device before suspend fixes resume.
>>
>> I just noticed that I get the following message on unbinding:
>>
>> $ echo 0000:00:03.0 > /sys/bus/pci/drivers/mei_me/unbind
>> $ dmesg|tail -2
>> [ 1216.830034] mei_me 0000:00:03.0: stop
>> [ 1216.837018] mei_me 0000:00:03.0: wait hw ready failed. status = 0x0
>>
>> not sure if this is related.
>>
> Thanks for the report I'm looking into it.

I looked at the git log of drivers/misc/mei and it looked promising.

However, it still does not work, commit
42f132febff3b7b42c6c9dbfc151f29233be3132 does not seem to help enough on
my hardware.

Still just unbinding and rebinding with
echo 0000:00:03.0 > /sys/bus/pci/drivers/mei_me/unbind
echo 0000:00:03.0 > /sys/bus/pci/drivers/mei_me/bind

triggers lots of
[  318.330981] mei_me 0000:00:03.0: reset: wrong host start response
[  318.330984] mei_me 0000:00:03.0: unexpected reset: dev_state = RESETTING
[  318.330990] mei_me 0000:00:03.0: reset: unexpected enumeration response hbm.
[  318.330993] mei_me 0000:00:03.0: unexpected reset: dev_state = RESETTING
[  318.331016] mei_me 0000:00:03.0: reset: wrong host start response
[  318.331019] mei_me 0000:00:03.0: unexpected reset: dev_state = RESETTING
[  346.571031] mei_me 0000:00:03.0: reset: init clients timeout hbm_state = 1.
[  346.571047] mei_me 0000:00:03.0: unexpected reset: dev_state = RESETTING
[  376.631030] mei_me 0000:00:03.0: reset: init clients timeout hbm_state = 1.
[  376.631044] mei_me 0000:00:03.0: unexpected reset: dev_state = RESETTING

It does, however, calm down after a few seconds, only to spew a few lines
once every 30 seconds:

[  406.691032] mei_me 0000:00:03.0: reset: init clients timeout hbm_state = 1.
[  406.691048] mei_me 0000:00:03.0: unexpected reset: dev_state = RESETTING
[  436.751033] mei_me 0000:00:03.0: reset: init clients timeout hbm_state = 1.
[  436.751047] mei_me 0000:00:03.0: unexpected reset: dev_state = RESETTING
[  466.811030] mei_me 0000:00:03.0: reset: init clients timeout hbm_state = 1.
[  466.811044] mei_me 0000:00:03.0: unexpected reset: dev_state = RESETTING

So it is not yet fixed, unfortunately.

Best regards,

	Stefan
-- 
Stefan Seyfried
Linux Consultant & Developer -- GPG Key: 0x731B665B

B1 Systems GmbH
Osterfeldstraße 7 / 85088 Vohburg / http://www.b1-systems.de
GF: Ralph Dehner / Unternehmenssitz: Vohburg / AG: Ingolstadt,HRB 3537
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