In yesterday's linux-tip I was able to provoke this backtrace by
repeatedly disabling and enabling the wifi on my EeePC 900:

[ 786.455830] uvcvideo 1-8:1.0: no reset_resume for driver uvcvideo?
[ 786.455835] uvcvideo 1-8:1.1: no reset_resume for driver uvcvideo?
[ 786.458642] uvcvideo: Found UVC 1.00 device CNF7129 (04f2:b071)
[ 786.485835] Restarting tasks ... <6>pciehp: Card not present on Slot(3)
[ 787.160420] done.
[ 787.197658] Trying to free already-free IRQ 18
[ 787.197726] Pid: 226, comm: pciehpd Not tainted
2.6.27-rc7-tipskw-00976-g30d1868-dirty #25
[ 787.197733] [] free_irq+0xa6/0x130
[ 787.197749] [] ath5k_pci_remove+0x77/0xb0
[ 787.197759] [] pci_device_remove+0x1e/0x40
[ 787.197770] [] __device_release_driver+0x5e/0x90
[ 787.197780] [] device_release_driver+0x28/0x40
[ 787.197788] [] bus_remove_device+0x65/0x80
[ 787.197796] [] device_del+0x101/0x180
[ 787.197805] [] device_unregister+0x10/0x20
[ 787.197813] [] pci_stop_dev+0x3d/0x50
[ 787.197820] [] pci_remove_bus_device+0x30/0xa0
[ 787.197829] [] pciehp_unconfigure_device+0x99/0x190
[ 787.197840] [] pciehp_disable_slot+0x5e/0x240
[ 787.197848] [] ? trace_hardirqs_on+0xb/0x10
[ 787.197858] [] pciehp_power_thread+0x88/0xe0
[ 787.197867] [] ? run_workqueue+0xd4/0x1e0
[ 787.197877] [] ? run_workqueue+0xd4/0x1e0
[ 787.197886] [] run_workqueue+0x136/0x1e0
[ 787.197894] [] ? run_workqueue+0xd4/0x1e0
[ 787.197902] [] ? pciehp_power_thread+0x0/0xe0
[ 787.197912] [] worker_thread+0x9b/0xf0
[ 787.197920] [] ? autoremove_wake_function+0x0/0x50
[ 787.197930] [] ? worker_thread+0x0/0xf0
[ 787.197939] [] kthread+0x46/0x80
[ 787.197947] [] ? kthread+0x0/0x80
[ 787.197955] [] kernel_thread_helper+0x7/0x10
[ 787.197966] =======================

--
Sitsofe | http://sucs.org/~sits/

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/