linux-kernel - Re: [Bug #13337] [post 2.6.29 regression] hang during suspend of b44/b43 modules

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Message-ID: <87y6qxx50z.fsf@scholz.fias.uni-frankfurt.de>
Date:	Thu, 09 Jul 2009 17:14:20 +0200
From:	Jan Scholz <scholz@...s.uni-frankfurt.de>
To:	Jan Scholz <scholz@...s.uni-frankfurt.de>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, johannes@...solutions.net,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	"Tomas Janousek" <tomi@...i.cz>
Subject: Re: [Bug #13337] [post 2.6.29 regression] hang during suspend of b44/b43 modules

Hi,

I have just checked this on v2.6.31-rc1 and v2.6.31-rc2-214-g34f2547
(I wanted to test this on v2.6.31-rc2 as well, but there I had other
suspend-issues that are fixed in todays v2.6.31-rc2-214-g34f2547)

For both v2.6.31-rc1 and v2.6.31-rc2-214-g34f2547 suspend to ram fails
with the test procedure described below, but it works fine when I revert
commit 5bb644a0fd25a5e083ecbfaa92a211db99aa6ef7
 "mac80211: cancel/restart all timers across suspend/resume"

Best regards,
   Jan

Jan Scholz <scholz@...s.uni-frankfurt.de> writes:

> Hi,
>
> I'm not sure if I experience the same bug on my apple iBook G4 (ppc
> 7447A, altivec supported PowerBook6,5) or just something very similar.
>
> With v2.6.30-rc1 I noticed, that suspending to ram does not work if my
> wireless card is 'up'. The wireless card is an apple airport extreme
> card, this is its lspci output:
>
> 0001:10:12.0 Network controller: Broadcom Corporation BCM4306 802.11b/g Wireless LAN Controller (rev 03)
>
> I tested suspend like this:
>
> # unload the wireless module
> modprobe -r b43
> echo mem > /sys/power/state
>
> # wake up works fine
>
> #loading b43
> modprobe b43
> echo mem > /sys/power/state
>
> # wake up still works fine
>
> ifconfig wlan0 up
> echo mem > /sys/power/state
>
> # the box does not wake up, I guess it's not really sleeping, because
> # the sleep led is not on
>
> I bisected this and got:
>
> 5bb644a0fd25a5e083ecbfaa92a211db99aa6ef7 is first bad commit
> commit 5bb644a0fd25a5e083ecbfaa92a211db99aa6ef7
> Author: Johannes Berg <johannes@...solutions.net>
> Date:   Sun May 17 11:40:42 2009 +0200
>    
>     mac80211: cancel/restart all timers across suspend/resume
>
>
> Best regards,
>     Jan Scholz
>
> "Rafael J. Wysocki" <rjw@...k.pl> writes:
>
>> This message has been generated automatically as a part of a report
>> of regressions introduced between 2.6.29 and 2.6.30.
>>
>> The following bug entry is on the current list of known regressions
>> introduced between 2.6.29 and 2.6.30.  Please verify if it still should
>> be listed and let me know (either way).
>>
>>
>> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=13337
>> Subject		: [post 2.6.29 regression] hang during suspend of b44/b43 modules
>> Submitter	: Tomas Janousek <tomi@...i.cz>
>> Date		: 2009-05-18 10:59 (50 days old)
>>
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