[187487.973224] ------------[ cut here ]------------
[187487.973247] WARNING: at /build/buildd/linux-2.6.35/net/mac80211/scan.c:262 ieee80211_scan_completed+0x10f/0x190 [mac80211]()
[187487.973251] Hardware name: Inspiron 1520                   
[187487.973253] Modules linked in: usblp aes_i586 aes_generic binfmt_misc rfcomm sco bnep l2cap parport_pc ppdev nvidia(P) snd_hda_codec_idt snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi arc4 iwl3945 r852 sm_common nand nand_ids nand_ecc snd_rawmidi snd_seq_midi_event video joydev iwlcore snd_seq snd_timer snd_seq_device mac80211 intel_agp mtd snd agpgart output soundcore cfg80211 snd_page_alloc btusb bluetooth uvcvideo videodev v4l1_compat psmouse serio_raw usbhid hid lp dell_laptop dell_wmi dcdbas parport b44 firewire_ohci sdhci_pci ahci ssb firewire_core sdhci led_class crc_itu_t mii libahci
[187487.973317] Pid: 810, comm: iwl3945 Tainted: P   M        2.6.35-22-generic #33-Ubuntu
[187487.973320] Call Trace:
[187487.973329]  [<c014ac52>] warn_slowpath_common+0x72/0xa0
[187487.973340]  [<f838820f>] ? ieee80211_scan_completed+0x10f/0x190 [mac80211]
[187487.973350]  [<f838820f>] ? ieee80211_scan_completed+0x10f/0x190 [mac80211]
[187487.973356]  [<c014aca2>] warn_slowpath_null+0x22/0x30
[187487.973367]  [<f838820f>] ieee80211_scan_completed+0x10f/0x190 [mac80211]
[187487.973379]  [<f8f0e98c>] iwl_bg_scan_completed+0xac/0xb0 [iwlcore]
[187487.973384]  [<c0161a4e>] run_workqueue+0x8e/0x150
[187487.973395]  [<f8f0e8e0>] ? iwl_bg_scan_completed+0x0/0xb0 [iwlcore]
[187487.973399]  [<c0161b94>] worker_thread+0x84/0xe0
[187487.973404]  [<c0165e10>] ? autoremove_wake_function+0x0/0x50
[187487.973408]  [<c0161b10>] ? worker_thread+0x0/0xe0
[187487.973412]  [<c01659e4>] kthread+0x74/0x80
[187487.973416]  [<c0165970>] ? kthread+0x0/0x80
[187487.973420]  [<c010363e>] kernel_thread_helper+0x6/0x10
[187487.973423] ---[ end trace 4584a0f7e9999fda ]---