4.332590] WARNING: at /build/buildd/linux-2.6.31/net/mac80211/iface.c:651 ieee80211_teardown_sdata+0xf1/0x1d0 [mac80211]()
Hardware name: Compaq Presario CQ60 Notebook PC
Modules linked in: cryptd aes_x86_64 aes_generic binfmt_misc ppdev snd_hda_codec_nvhdmi snd_hda_codec_conexant snd_hda_intel snd_hda_codec arc4 ecb snd_hwdep snd_pcm_oss joydev snd_mixer_oss ath5k snd_pcm mac80211 iptable_filter ip_tables snd_seq_dummy led_class snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device ath x_tables psmouse amd64_edac_mod snd shpchp lp serio_raw i2c_nforce2 edac_core parport soundcore snd_page_alloc cfg80211 usb_storage video output forcedeth
Pid: 987, comm: wpa_supplicant Tainted: G        W  2.6.31-14-generic #48-Ubuntu
Call Trace:
 [<ffffffff8105e788>] warn_slowpath_common+0x78/0xb0
 [<ffffffff8105e7cf>] warn_slowpath_null+0xf/0x20
 [<ffffffffa013d151>] ieee80211_teardown_sdata+0xf1/0x1d0 [mac80211]
 [<ffffffff81509420>] ? ioctl_private_call+0x0/0xa0
 [<ffffffffa013d28d>] ieee80211_if_change_type+0x5d/0xe0 [mac80211]
 [<ffffffffa013fb65>] ieee80211_change_iface+0x65/0xb0 [mac80211]
 [<ffffffffa0047e82>] cfg80211_wext_siwmode+0xb2/0x100 [cfg80211]
 [<ffffffff8150a40b>] ioctl_standard_call+0x5b/0xd0
 [<ffffffff814388b0>] ? __dev_get_by_name+0xa0/0xc0
 [<ffffffff8150a3b0>] ? ioctl_standard_call+0x0/0xd0
 [<ffffffff815095a9>] wireless_process_ioctl+0xd9/0x160
 [<ffffffff8150a3b0>] ? ioctl_standard_call+0x0/0xd0
 [<ffffffff8150969c>] wext_ioctl_dispatch+0x6c/0xb0
 [<ffffffff81509420>] ? ioctl_private_call+0x0/0xa0
 [<ffffffff81509811>] wext_handle_ioctl+0x41/0x90
 [<ffffffff8143994e>] dev_ioctl+0x27e/0x290
 [<ffffffff81426ac5>] sock_ioctl+0x95/0x280
 [<ffffffff8112ddfd>] vfs_ioctl+0x1d/0xa0
 [<ffffffff8112e429>] do_vfs_ioctl+0x79/0x370
 [<ffffffff8112e7a1>] sys_ioctl+0x81/0xa0
 [<ffffffff81012002>] system_call_fastpath+0x16/0x1b
---[ end trace 97429ed523360479 ]---