[ 3974.489882] ------------[ cut here ]------------
[ 3974.489893] WARNING: at /build/buildd/linux-3.5.0/drivers/net/wireless/brcm80211/brcmsmac/main.c:2704 brcms_c_enable_mac+0x1c2/0x1e0 [brcmsmac]()
[ 3974.489894] Hardware name: M11x
[ 3974.489896] Modules linked in: des_generic md4 nls_utf8 cifs nls_iso8859_1 snd_hrtimer ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables dm_crypt bridge stp llc rfcomm bnep parport_pc ppdev autofs4 nfsd nfs lockd fscache auth_rpcgss nfs_acl binfmt_misc sunrpc nvidia(PO) snd_hda_codec_hdmi btusb bluetooth arc4 uvcvideo snd_hda_codec_realtek videobuf2_core videodev snd_hda_intel snd_hda_codec snd_hwdep videobuf2_vmalloc videobuf2_memops snd_pcm brcmsmac mac80211 joydev snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq brcmutil snd_timer snd_seq_device dell_wmi psmouse snd coretemp sparse_keymap kvm_intel cfg80211 kvm cordic microcode serio_raw lpc_ich jmb38x_ms memstick soundcore wmi mac_hid bcma snd_page_alloc lp parport hid_generic usbhid hid uas usb_storage video firewire_ohci atl1c firewire_core crc_itu_t sdhci_pci sdhci
[ 3974.489974] Pid: 31815, comm: kworker/u:1 Tainted: P        W  O 3.5.0-21-generic #32-Ubuntu
[ 3974.489976] Call Trace:
[ 3974.489980]  [<ffffffff81051c1f>] warn_slowpath_common+0x7f/0xc0
[ 3974.489984]  [<ffffffff81051c7a>] warn_slowpath_null+0x1a/0x20
[ 3974.489996]  [<ffffffffa02e5412>] brcms_c_enable_mac+0x1c2/0x1e0 [brcmsmac]
[ 3974.490009]  [<ffffffffa02efce2>] wlapi_enable_mac+0x12/0x20 [brcmsmac]
[ 3974.490022]  [<ffffffffa02f6556>] wlc_phy_stf_chain_active_get+0x76/0xc0 [brcmsmac]
[ 3974.490035]  [<ffffffffa02f111e>] brcms_c_tempsense_upd+0x1e/0x80 [brcmsmac]
[ 3974.490047]  [<ffffffffa02e788a>] brcms_c_watchdog_by_timer+0xfa/0x400 [brcmsmac]
[ 3974.490057]  [<ffffffffa02de501>] _brcms_timer+0x41/0x90 [brcmsmac]
[ 3974.490061]  [<ffffffff8107086a>] process_one_work+0x12a/0x420
[ 3974.490070]  [<ffffffffa02de4c0>] ? brcms_ops_tx+0x90/0x90 [brcmsmac]
[ 3974.490074]  [<ffffffff8107140e>] worker_thread+0x12e/0x2f0
[ 3974.490078]  [<ffffffff810712e0>] ? manage_workers.isra.26+0x200/0x200
[ 3974.490082]  [<ffffffff81075f03>] kthread+0x93/0xa0
[ 3974.490086]  [<ffffffff8168cc64>] kernel_thread_helper+0x4/0x10
[ 3974.490090]  [<ffffffff81075e70>] ? kthread_freezable_should_stop+0x70/0x70
[ 3974.490094]  [<ffffffff8168cc60>] ? gs_change+0x13/0x13
[ 3974.490096] ---[ end trace 9ca16e02980f924b ]---