Seen in my dmesg, 3.3.0-rc6-next20120305. Dell Latitude E6500,
Intel 5100 wireless card. Seems to be pretty reproducible.
Have hit this one 368 times in 10 hours of uptime:
[ 159.765059] wlan0: authenticate with d8:c7:c8:81:98:f0
[ 159.767884] wlan0: send auth to d8:c7:c8:81:98:f0 (try 1/3)
[ 159.769451] wlan0: authenticated
[ 159.769870] wlan0: waiting for beacon from d8:c7:c8:81:98:f0
[ 159.881293] wlan0: associate with d8:c7:c8:81:98:f0 (try 1/3)
[ 159.883470] wlan0: RX AssocResp from d8:c7:c8:81:98:f0 (capab=0x511 status=0 aid=4)
[ 159.883474] wlan0: associated
[ 159.890205] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[ 164.620017] BUG: sleeping function called from invalid context at drivers/net/wireless/iwlwifi/iwl-trans.h:459
[ 164.620950] in_atomic(): 1, irqs_disabled(): 1, pid: 59, name: kworker/u:4
[ 164.620950] 5 locks held by kworker/u:4/59:
[ 164.620950] #0: (wiphy_name(local->hw.wiphy)){.+.+.+}, at: [<ffffffff810449e0>] process_one_work+0x1a4/0x455
[ 164.620950] #1: ((&sta->ampdu_mlme.work)){+.+...}, at: [<ffffffff810449e0>] process_one_work+0x1a4/0x455
[ 164.620950] #2: (&sta->ampdu_mlme.mtx){+.+.+.}, at: [<ffffffff8157b43f>] ieee80211_ba_session_work+0x49/0x1cd
[ 164.620950] #3: (&priv->shrd->mutex){+.+.+.}, at: [<ffffffff8134d9c6>] iwlagn_mac_ampdu_action+0xba/0x322
[ 164.620950] #4: (&(&priv->shrd->sta_lock)->rlock){..-...}, at: [<ffffffff81352aa1>] iwlagn_tx_agg_start+0x124/0x26d
[ 164.620950] irq event stamp: 2564
[ 164.620950] hardirqs last enabled at (2563): [<ffffffff810c88ad>] __free_pages_ok+0x97/0xa3
[ 164.620950] hardirqs last disabled at (2564): [<ffffffff815da880>] _raw_spin_lock_irqsave+0x1a/0x57
[ 164.620950] softirqs last enabled at (2532): [<ffffffff81032641>] irq_exit+0x75/0xd5
[ 164.620950] softirqs last disabled at (2531): [<ffffffff810032cc>] do_IRQ+0x89/0xa0
[ 164.620950] Pid: 59, comm: kworker/u:4 Tainted: G O 3.3.0-rc6-next-20120305 #1
[ 164.620950] Call Trace:
[ 164.620950] [<ffffffff8106f16f>] ? print_irqtrace_events+0x9d/0xa1
[ 164.620950] [<ffffffff81053486>] __might_sleep+0x19f/0x1a7
[ 164.620950] [<ffffffff81352adb>] iwlagn_tx_agg_start+0x15e/0x26d
[ 164.620950] [<ffffffff8134dadb>] iwlagn_mac_ampdu_action+0x1cf/0x322
[ 164.620950] [<ffffffff8157bed2>] drv_ampdu_action+0x135/0x20f
[ 164.620950] [<ffffffff8157c978>] ieee80211_tx_ba_session_handle_start+0x79/0x28a
[ 164.620950] [<ffffffff81070a29>] ? trace_hardirqs_on+0xd/0xf
[ 164.620950] [<ffffffff81031edf>] ? _local_bh_enable_ip+0x127/0x18f
[ 164.620950] [<ffffffff8157b515>] ieee80211_ba_session_work+0x11f/0x1cd
[ 164.620950] [<ffffffff81044a97>] process_one_work+0x25b/0x455
[ 164.620950] [<ffffffff810449e0>] ? process_one_work+0x1a4/0x455
[ 164.620950] [<ffffffff8157b3f6>] ? ieee80211_sta_tear_down_BA_sessions+0x56/0x56
[ 164.620950] [<ffffffff8104289d>] ? spin_lock_irq+0x9/0xb
[ 164.620950] [<ffffffff81044fa7>] worker_thread+0x15a/0x239
[ 164.620950] [<ffffffff81044e4d>] ? rescuer_thread+0x192/0x192
[ 164.620950] [<ffffffff810499bd>] kthread+0x86/0x8e
[ 164.620950] [<ffffffff815e2434>] kernel_thread_helper+0x4/0x10
[ 164.620950] [<ffffffff815db41d>] ? retint_restore_args+0xe/0xe
[ 164.620950] [<ffffffff81049937>] ? flush_kthread_worker+0xcf/0xcf
[ 164.620950] [<ffffffff815e2430>] ? gs_change+0xb/0xb
[ 164.842511]
And the other one has triggered 344 times:
[ 299.323405] BUG: sleeping function called from invalid context at drivers/net/wireless/iwlwifi/iwl-trans.h:448
[ 299.323410] in_atomic(): 1, irqs_disabled(): 1, pid: 61, name: kworker/u:6
[ 299.323412] INFO: lockdep is turned off.
[ 299.323415] irq event stamp: 35694
[ 299.323417] hardirqs last enabled at (35693): [<ffffffff8109aedb>] rcu_note_context_switch+0x1d9/0x29a
[ 299.323426] hardirqs last disabled at (35694): [<ffffffff815da82d>] _raw_spin_lock_irq+0x12/0x4b
[ 299.323432] softirqs last enabled at (34130): [<ffffffff8157343e>] ieee80211_configure_filter+0x1b5/0x30d
[ 299.323439] softirqs last disabled at (34128): [<ffffffff815da908>] _raw_spin_lock_bh+0x11/0x4a
[ 299.323445] Pid: 61, comm: kworker/u:6 Tainted: G O 3.3.0-rc6-next-20120305 #1
[ 299.323448] Call Trace:
[ 299.323454] [<ffffffff8106f16f>] ? print_irqtrace_events+0x9d/0xa1
[ 299.323460] [<ffffffff81053486>] __might_sleep+0x19f/0x1a7
[ 299.323465] [<ffffffff813519c7>] iwl_trans_tx_agg_disable+0x27/0x70
[ 299.323469] [<ffffffff8135294d>] iwlagn_tx_agg_stop+0x1d6/0x206
[ 299.323475] [<ffffffff8134db1d>] iwlagn_mac_ampdu_action+0x211/0x322
[ 299.323480] [<ffffffff8157bed2>] drv_ampdu_action+0x135/0x20f
[ 299.323484] [<ffffffff8157c863>] ___ieee80211_stop_tx_ba_session+0x143/0x1df
[ 299.323489] [<ffffffff8157b59f>] ieee80211_ba_session_work+0x1a9/0x1cd
[ 299.323494] [<ffffffff81044a97>] process_one_work+0x25b/0x455
[ 299.323498] [<ffffffff810449e0>] ? process_one_work+0x1a4/0x455
[ 299.323503] [<ffffffff8157b3f6>] ? ieee80211_sta_tear_down_BA_sessions+0x56/0x56
[ 299.323507] [<ffffffff8104289d>] ? spin_lock_irq+0x9/0xb
[ 299.323511] [<ffffffff81044fa7>] worker_thread+0x15a/0x239
[ 299.323515] [<ffffffff81044e4d>] ? rescuer_thread+0x192/0x192
[ 299.323520] [<ffffffff810499bd>] kthread+0x86/0x8e
[ 299.323525] [<ffffffff815e2434>] kernel_thread_helper+0x4/0x10
[ 299.323530] [<ffffffff815db41d>] ? retint_restore_args+0xe/0xe
[ 299.323534] [<ffffffff81049937>] ? flush_kthread_worker+0xcf/0xcf
[ 299.323538] [<ffffffff815e2430>] ? gs_change+0xb/0xb
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