------------[ cut here ]------------
WARNING: at /build/buildd/linux-2.6.35/net/wireless/core.c:633 wdev_cleanup_work+0xe1/0x110 [cfg80211]()
Hardware name: Aspire 5940     
Modules linked in: btrfs zlib_deflate crc32c libcrc32c ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs reiserfs cryptd aes_x86_64 aes_generic binfmt_misc nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs parport_pc ppdev snd_hda_codec_atihdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec arc4 snd_hwdep snd_pcm snd_seq_midi joydev iwlagn snd_rawmidi uvcvideo iwlcore snd_seq_midi_event snd_seq mac80211 snd_timer snd_seq_device snd cfg80211 radeon psmouse videodev ttm i7core_edac drm_kms_helper jmb38x_ms v4l1_compat soundcore v4l2_compat_ioctl32 edac_core serio_raw memstick snd_page_alloc drm i2c_algo_bit lp video lirc_ene0100(C) lirc_dev output parport coretemp usbhid hid ahci sdhci_pci firewire_ohci sdhci libahci firewire_core crc_itu_t tg3 led_class
Pid: 975, comm: cfg80211 Tainted: G         C  2.6.35-21-generic #31-Ubuntu
Call Trace:
 [<ffffffff8106075f>] warn_slowpath_common+0x7f/0xc0
 [<ffffffff810607ba>] warn_slowpath_null+0x1a/0x20
 [<ffffffffa0193271>] wdev_cleanup_work+0xe1/0x110 [cfg80211]
 [<ffffffffa0193190>] ? wdev_cleanup_work+0x0/0x110 [cfg80211]
 [<ffffffff8107a745>] run_workqueue+0xc5/0x1a0
 [<ffffffff8107a8c3>] worker_thread+0xa3/0x110
 [<ffffffff8107f5f0>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff8107a820>] ? worker_thread+0x0/0x110
 [<ffffffff8107f096>] kthread+0x96/0xa0
 [<ffffffff8100aee4>] kernel_thread_helper+0x4/0x10
 [<ffffffff8107f000>] ? kthread+0x0/0xa0
 [<ffffffff8100aee0>] ? kernel_thread_helper+0x0/0x10
---[ end trace 4b8368c0c9945d18 ]---