------------[ cut here ]------------
WARNING: at /build/buildd/linux-2.6.35/net/mac80211/scan.c:265 ieee80211_scan_completed+0x17e/0x190 [mac80211]()
Hardware name: HP Compaq nx9420 (ES441ET#ABU)
Modules linked in: rfcomm binfmt_misc sco bnep l2cap snd_hda_codec_analog snd_hda_intel snd_usb_audio snd_hda_codec snd_hwdep snd_usbmidi_lib snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event arc4 snd_seq snd_timer radeon iwl3945 ttm drm_kms_helper snd_seq_device pcmcia snd iwlcore hp_accel intel_agp drm ppdev tifm_7xx1 mac80211 video tifm_core output uvcvideo snd_page_alloc videodev btusb lis3lv02d agpgart yenta_socket lp i2c_algo_bit psmouse soundcore parport_pc v4l1_compat input_polldev serio_raw pcmcia_rsrc joydev bluetooth hp_wmi pcmcia_core parport cfg80211 usbhid hid firewire_ohci sdhci_pci ahci tg3 sdhci libahci firewire_core led_class crc_itu_t
Pid: 811, comm: iwl3945 Tainted: G        W   2.6.35-22-generic-pae #33-Ubuntu
Call Trace:
 [<c01527b2>] warn_slowpath_common+0x72/0xa0
 [<f8d4e27e>] ? ieee80211_scan_completed+0x17e/0x190 [mac80211]
 [<f8d4e27e>] ? ieee80211_scan_completed+0x17e/0x190 [mac80211]
 [<c0152802>] warn_slowpath_null+0x22/0x30
 [<f8d4e27e>] ieee80211_scan_completed+0x17e/0x190 [mac80211]
 [<f8e529dc>] iwl_bg_scan_completed+0xac/0xb0 [iwlcore]
 [<c0169d3e>] run_workqueue+0x8e/0x150
 [<f8e52930>] ? iwl_bg_scan_completed+0x0/0xb0 [iwlcore]
 [<c0169e84>] worker_thread+0x84/0xe0
 [<c016e100>] ? autoremove_wake_function+0x0/0x50
 [<c0169e00>] ? worker_thread+0x0/0xe0
 [<c016dcd4>] kthread+0x74/0x80
 [<c016dc60>] ? kthread+0x0/0x80
 [<c010993e>] kernel_thread_helper+0x6/0x10
---[ end trace 7f523d40dbdfc73a ]---