Bug 15408 - WARNING: at net/mac80211/mlme.c:2090 ieee80211_sta_work
Summary: WARNING: at net/mac80211/mlme.c:2090 ieee80211_sta_work
Status: CLOSED CODE_FIX
Alias: None
Product: Networking
Classification: Unclassified
Component: Wireless (show other bugs)
Hardware: x86-64 Linux
: P1 normal
Assignee: Reinette Chatre
URL:
Keywords:
Depends on:
Blocks: 14885
  Show dependency tree
 
Reported: 2010-02-27 08:45 UTC by Alex Zhavnerchik
Modified: 2010-03-21 19:50 UTC (History)
4 users (show)

See Also:
Kernel Version: 2.6.33
Subsystem:
Regression: Yes
Bisected commit-id:

Attachments
here is dmesg (122.45 KB, text/plain)
2010-02-27 08:45 UTC, Alex Zhavnerchik 		Details
here is my kernel config (92.10 KB, text/plain)
2010-02-27 08:47 UTC, Alex Zhavnerchik 		Details
Enable memory allocation to sleep (9.82 KB, patch)
2010-03-02 17:41 UTC, Reinette Chatre 		Details | Diff
Add an attachment (proposed patch, testcase, etc.)

Description Alex Zhavnerchik 2010-02-27 08:45:57 UTC 
Created attachment 25258 [details]
here is dmesg

This bug appears only on 2.6.33 release, on previous versions and 2.6.33 rcs I didn't catch it. It appears after resume from s2ram. After I do "rmmod iwlagn" and then "modprobe iwlagn" wireless starts working.

I use "03:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61)" on my Thinkpad T61
Comment 1 Alex Zhavnerchik 2010-02-27 08:47:10 UTC 
Created attachment 25259 [details]
here is my kernel config
Comment 2 John W. Linville 2010-02-27 15:00:45 UTC 
So, are you saying that the device doesn't work after getting that warning on resume?
Comment 3 Alex Zhavnerchik 2010-02-27 18:44:45 UTC 
Yes, exactly
Comment 4 Reinette Chatre 2010-03-02 17:41:48 UTC 
Created attachment 25325 [details]
Enable memory allocation to sleep

Could you please test this patch?
Comment 5 Alex Zhavnerchik 2010-03-02 22:49:20 UTC 
Yeh, I'll try
Comment 6 Alex Zhavnerchik 2010-03-02 22:51:56 UTC 
But I can't guaranty that I can test it properly. I didn't reproduce it after initial report.
Comment 7 Reinette Chatre 2010-03-02 23:05:25 UTC 
I am confident that the patch provided will address this issue. Please note that the issue being addressed is not the "WARNING: at net/mac80211/mlme.c:2090 ieee80211_sta_work" - the actual problem occurred earlier.

Taking a closer look at your logs you will see the problem starts with a memory allocation failure:

[70331.126159] s2ram: page allocation failure. order:4, mode:0x40d0
[70331.126163] Pid: 10885, comm: s2ram Tainted: G        W  2.6.33 #3
[70331.126165] Call Trace:
[70331.126175]  [<ffffffff810ba437>] __alloc_pages_nodemask+0x577/0x620
[70331.126180]  [<ffffffff810dfa2a>] alloc_pages_current+0x90/0x99
[70331.126183]  [<ffffffff810b8c6d>] __get_free_pages+0x9/0x46
[70331.126204]  [<ffffffffa03f1854>] iwl_tx_queue_init+0xf3/0x29b [iwlcore]
[...]

Even though this failure occurs during resume the device is not stopped and later requests to it will clearly fail. One failure is what you captured in the title of this bug report. Notice how that error you captured has the message ... "STA MLME work scheduled while going to suspend" included. This is because the system still considers it in suspended state due to the failure of resume.

Now, the the problem that triggered all of these failures (the memory allocation failure) has already been shown to be fixed by the patch provided. Please see http://lkml.org/lkml/2010/2/6/70 for a duplicate report.

We should thus send this patch to stable.
Comment 8 Rafael J. Wysocki 2010-03-21 19:50:42 UTC 
Fixed by commit f36d04abe684f9e2b07c6ebe9f77ae20eb5c1e84 .
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