kobject: '' (ffff8800d8d6d738): is not initialized, yet kobject_put() is being called.

[10558.028047] ------------[ cut here ]------------
[10558.028054] WARNING: at /tmp/buildd/linux-2.6-2.6.30/debian/build/source_amd64_none/lib/kobject.c:595 kobject_put+0x2f/0x42()
[10558.028057] Hardware name: Precision M6300
[10558.028059] kobject: '' (ffff8800d8d6d738): is not initialized, yet kobject_put() is being called.
[10558.028061] Modules linked in: usbhid hid snd_usb_audio pwc snd_usb_lib videodev v4l1_compat v4l2_compat_ioctl32 cryptd aes_x86_64 aes_generic binfmt_misc sco bridge stp bnep rfcomm l2cap bluetooth vboxnetflt vboxnetadp vboxdrv ppdev parport_pc lp parport acpi_cpufreq cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_conservative reiserfs firewire_sbp2 loop joydev snd_hda_codec_idt snd_hda_intel snd_hda_codec arc4 snd_hwdep snd_pcm_oss snd_mixer_oss ecb snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq iwlagn iwlcore snd_timer snd_seq_device psmouse mac80211 video i2c_i801 dell_laptop rfkill snd output wmi serio_raw pcspkr evdev ac dcdbas cfg80211 button battery nvidia(P) processor i2c_core soundcore snd_page_alloc ext2 mbcache dm_mirror dm_region_hash dm_log dm_snapshot dm_mod sd_mod crc_t10dif ide_cd_mod cdrom ata_piix ata_generic tg3 libata scsi_mod piix sdhci_pci sdhci firewire_ohci libphy mmc_core firewire_core crc_itu_t ricoh_mmc led_class ide_pci_generic ide_core ehci_hcd uhci_hcd intel_agp thermal fan thermal_sys [last unloaded: scsi_wait_scan]
[10558.028134] Pid: 2002, comm: hald-addon-inpu Tainted: P 2.6.30-bpo.1-amd64 #1
[10558.028136] Call Trace:
[10558.028139] [] ? kobject_put+0x2f/0x42
[10558.028141] [] ? kobject_put+0x2f/0x42
[10558.028145] [] ? warn_slowpath_common+0x77/0xa3
[10558.028148] [] ? warn_slowpath_fmt+0x51/0x59
[10558.028153] [] ? wait_for_common+0xe2/0x148
[10558.028155] [] ? default_wake_function+0x0/0x9
[10558.028159] [] ? __bitmap_weight+0x3a/0x7e
[10558.028161] [] ? kobject_put+0x2f/0x42
[10558.028168] [] ? evdev_free+0x20/0x29 [evdev]
[10558.028171] [] ? device_release+0x41/0x6a
[10558.028174] [] ? kobject_release+0x48/0x5e
[10558.028176] [] ? kobject_release+0x0/0x5e
[10558.028178] [] ? kref_put+0x41/0x4c
[10558.028182] [] ? evdev_release+0xcf/0xd9 [evdev]
[10558.028186] [] ? __fput+0xc6/0x16e
[10558.028189] [] ? filp_close+0x5b/0x62
[10558.028191] [] ? sys_close+0x94/0xcd
[10558.028195] [] ? system_call_fastpath+0x16/0x1b
[10558.028197] ---[ end trace b3b4b30111f41f7e ]---