Bug 10334 - iwlwifi: circular locking on suspend
Summary: iwlwifi: circular locking on suspend
Status: CLOSED PATCH_ALREADY_AVAILABLE
Alias: None
Product: Drivers
Classification: Unclassified
Component: network-wireless (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_network-wireless@kernel-bugs.osdl.org
URL:
Keywords:
Depends on:
Blocks: 7216
  Show dependency tree
 
Reported: 2008-03-26 12:37 UTC by Mircea Gherzan
Modified: 2008-07-06 09:02 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.6.24.4
Subsystem:
Regression: ---
Bisected commit-id:

Attachments
relevant dmesg on suspend (3.02 KB, application/x-gzip)
2008-03-26 12:39 UTC, Mircea Gherzan 		Details
another suspend, with wireless OFF (2.60 KB, application/x-gzip)
2008-04-01 13:47 UTC, Mircea Gherzan 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Mircea Gherzan 2008-03-26 12:37:24 UTC 
Latest working kernel version:
Earliest failing kernel version:
Distribution: Debian Sid
Hardware Environment: Fujitsu-Siemens E8110 notebook, T2400, 1.5G RAM, IWL3945
Software Environment: GNOME 2.22, vanilla kernel
Problem Description:

[ 1871.551306] =======================================================
[ 1871.551311] [ INFO: possible circular locking dependency detected ]
[ 1871.551315] 2.6.24.4-pso #1
[ 1871.551318] -------------------------------------------------------
[ 1871.551322] bash/4519 is trying to acquire lock:
[ 1871.551325]  (iwl3945){--..}, at: [<c013997d>] cleanup_workqueue_thread+0xd/0x70
[ 1871.551339] 
[ 1871.551340] but task is already holding lock:
[ 1871.551343]  (workqueue_mutex){--..}, at: [<c0139ae2>] workqueue_cpu_callback+0x102/0x130
[ 1871.551352] 
[ 1871.551353] which lock already depends on the new lock.

Steps to reproduce:

sudo bash -c "echo mem > /sys/power/state"
with the wireless interface associated
Comment 1 Mircea Gherzan 2008-03-26 12:39:29 UTC 
Created attachment 15454 [details]
relevant dmesg on suspend
Comment 2 Mircea Gherzan 2008-04-01 13:47:00 UTC 
Created attachment 15555 [details]
another suspend, with wireless OFF

It seems that the issue remains even with the wireless interface not associated (RFKILL switch ON).
Comment 3 John W. Linville 2008-07-02 07:47:47 UTC 
Is this happening with 2.6.25 or later?
Comment 4 Mircea Gherzan 2008-07-05 06:47:56 UTC 
No, it is not happening with 2.6.25.
Comment 5 Adrian Bunk 2008-07-06 09:02:52 UTC 
Thanks for this update.
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