------------[ cut here ]------------
WARNING: at /build/buildd/linux-2.6.35/net/mac80211/rc80211_minstrel.c:70 minstrel_tx_status+0x74/0xe0 [mac80211]()
Hardware name: The Leopard Extreme
Modules linked in: binfmt_misc parport_pc ppdev vboxnetadp vboxnetflt vboxdrv snd_hda_codec_realtek arc4 nvidia(P) ath5k mac80211 snd_hda_intel snd_hda_codec snd_hwdep ath snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd cfg80211 i7core_edac soundcore edac_core led_class vga16fb snd_page_alloc lp parport vgastate psmouse wacom joydev serio_raw usbhid pata_marvell hid firewire_ohci ahci firewire_core libahci crc_itu_t e1000e
Pid: 0, comm: swapper Tainted: P        W   2.6.35-6-generic #9-Ubuntu
Call Trace:
 <IRQ>  [<ffffffff8105f6ef>] warn_slowpath_common+0x7f/0xc0
 [<ffffffff8105f74a>] warn_slowpath_null+0x1a/0x20
 [<ffffffffa0222304>] minstrel_tx_status+0x74/0xe0 [mac80211]
 [<ffffffffa01f93ff>] ieee80211_tx_status+0x20f/0x880 [mac80211]
 [<ffffffff81035d89>] ? default_spin_lock_flags+0x9/0x10
 [<ffffffffa024d457>] ath5k_tx_processq+0x237/0x490 [ath5k]
 [<ffffffffa0250255>] ? ath5k_intr+0xf5/0x3d0 [ath5k]
 [<ffffffffa024d715>] ath5k_tasklet_tx+0x65/0x80 [ath5k]
 [<ffffffff81065795>] tasklet_action+0xd5/0xe0
 [<ffffffff812f13fe>] ? irq_2_iommu+0xe/0x40
 [<ffffffff810666b9>] __do_softirq+0xb9/0x1f0
 [<ffffffff8102c3da>] ? eoi_ioapic_irq+0xca/0xf0
 [<ffffffff8102c432>] ? ir_ack_apic_level+0x32/0x40
 [<ffffffff8100afdc>] call_softirq+0x1c/0x30
 [<ffffffff8100cab5>] do_softirq+0x65/0xa0
 [<ffffffff81066575>] irq_exit+0x85/0x90
 [<ffffffff8158fdd5>] do_IRQ+0x75/0xf0
 [<ffffffff815889d3>] ret_from_intr+0x0/0x11
 <EOI>  [<ffffffff81320881>] ? acpi_idle_enter_bm+0x25d/0x295
 [<ffffffff8132087a>] ? acpi_idle_enter_bm+0x256/0x295
 [<ffffffff81471327>] cpuidle_idle_call+0xa7/0x140
 [<ffffffff81008da3>] cpu_idle+0xb3/0x110
 [<ffffffff8158256a>] start_secondary+0x100/0x102
---[ end trace 6b0f944e800f83d2 ]---