------------[ cut here ]------------
WARNING: at /build/buildd/linux-2.6.32/drivers/usb/serial/usb-serial.c:440 serial_unthrottle+0x8e/0x90 [usbserial]()
Hardware name: VGN-Z31WN_B
Modules linked in: usb_storage hidp binfmt_misc rfcomm sco bridge stp ppdev bnep l2cap vboxnetadp vboxnetflt vboxdrv snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss fbcon tileblit font bitblit softcursor snd_pcm vga16fb vgastate snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event arc4 snd_seq uinput snd_timer i915 snd_seq_device joydev drm_kms_helper qcserial usbserial pcmcia sdhci_pci iwlagn uvcvideo drm lp iwlcore snd yenta_socket sdhci psmouse i2c_algo_bit tpm_infineon videodev rsrc_nonstatic soundcore parport v4l1_compat tpm serio_raw video led_class btusb intel_agp mac80211 v4l2_compat_ioctl32 snd_page_alloc tpm_bios pcmcia_core output cfg80211 bluetooth sony_laptop usbhid hid ohci1394 ieee1394 ahci e1000e sky2
Pid: 912, comm: gobi_loader Not tainted 2.6.32-19-generic #28-Ubuntu
Call Trace:
 [<ffffffff81066ceb>] warn_slowpath_common+0x7b/0xc0
 [<ffffffff81066d44>] warn_slowpath_null+0x14/0x20
 [<ffffffffa01f261e>] serial_unthrottle+0x8e/0x90 [usbserial]
 [<ffffffff8132f499>] tty_unthrottle+0x49/0x60
 [<ffffffff8132d201>] reset_buffer_flags+0xd1/0x100
 [<ffffffff8132d24d>] n_tty_flush_buffer+0x1d/0x90
 [<ffffffff813305df>] ? tty_ldisc_try+0x4f/0x60
 [<ffffffff81330d07>] tty_ldisc_flush+0x37/0x60
 [<ffffffff81331e8e>] tty_port_close_end+0x2e/0x100
 [<ffffffffa01f2c79>] serial_close+0x89/0xc0 [usbserial]
 [<ffffffff8132a613>] tty_release_dev+0x163/0x5e0
 [<ffffffff81134546>] ? __slab_free+0x96/0x120
 [<ffffffff8132aaae>] tty_release+0x1e/0x30
 [<ffffffff811441a5>] __fput+0xf5/0x210
 [<ffffffff811442e5>] fput+0x25/0x30
 [<ffffffff811403dd>] filp_close+0x5d/0x90
 [<ffffffff81068d6f>] put_files_struct+0x7f/0xf0
 [<ffffffff81068e34>] exit_files+0x54/0x70
 [<ffffffff8106b38b>] do_exit+0x14b/0x380
 [<ffffffff8153e278>] ? thread_return+0x48/0x420
 [<ffffffff8106b615>] do_group_exit+0x55/0xd0
 [<ffffffff8107bf57>] get_signal_to_deliver+0x1d7/0x3d0
 [<ffffffff81012a35>] do_signal+0x75/0x1c0
 [<ffffffff81330b4e>] ? tty_ldisc_deref+0xe/0x10
 [<ffffffff8132b123>] ? tty_write+0x233/0x2a0
 [<ffffffff81012bdd>] do_notify_resume+0x5d/0x80
 [<ffffffff81143141>] ? sys_write+0x51/0x80
 [<ffffffff8101347e>] int_signal+0x12/0x17
---[ end trace c58559002e057d38 ]---