Hi,
I am running the uvcvideo module from subversion with Linux 2.6.23.11, and I
have just found this
BUG in my message log:
usb 4-3: new high speed USB device using ehci_hcd and address 4
usb 4-3: configuration #1 chosen from 1 choice
uvcvideo: Found UVC 1.00 device <unnamed> (046d:0992)
BUG: atomic counter underflow at:
[<f89c3ee4>] uvc_acquire_privileges+0x34/0x66 [uvcvideo]
[<f89c4647>] uvc_v4l2_do_ioctl+0x60d/0xcd6 [uvcvideo]
[<c015ae59>] __slab_free+0xaa/0x2ca
[<f892303b>] v4l_compat_translate_ioctl+0x1ea3/0x1ebc [v4l1_compat]
[<f89212ea>] v4l_compat_translate_ioctl+0x152/0x1ebc [v4l1_compat]
[<f892303b>] v4l_compat_translate_ioctl+0x1ea3/0x1ebc [v4l1_compat]
[<f892303b>] v4l_compat_translate_ioctl+0x1ea3/0x1ebc [v4l1_compat]
[<f8921510>] v4l_compat_translate_ioctl+0x378/0x1ebc [v4l1_compat]
[<c02770b7>] _spin_unlock_irqrestore+0xf/0x23
[<c01fbd2f>] dma_pool_alloc+0x171/0x17e
[<c011ae0f>] find_busiest_group+0x1c4/0x547
[<c011ae0f>] find_busiest_group+0x1c4/0x547
[<f8848bf6>] qh_append_tds+0x366/0x452 [ehci_hcd]
[<f88487e3>] qh_urb_transaction+0x2be/0x2fd [ehci_hcd]
[<c02770b7>] _spin_unlock_irqrestore+0xf/0x23
[<c01fbd2f>] dma_pool_alloc+0x171/0x17e
[<c02770b7>] _spin_unlock_irqrestore+0xf/0x23
[<f8849308>] ehci_urb_enqueue+0x123/0xce1 [ehci_hcd]
[<c012b727>] __atomic_notifier_call_chain+0x3f/0x5a
[<c012b759>] atomic_notifier_call_chain+0x17/0x1a
[<c01ac9f4>] __next_cpu+0x12/0x21
[<c011ae0f>] find_busiest_group+0x1c4/0x547
[<c02770b7>] _spin_unlock_irqrestore+0xf/0x23
[<c0128377>] lock_timer_base+0x19/0x35
[<c01b0328>] number+0x159/0x231
[<c02770b7>] _spin_unlock_irqrestore+0xf/0x23
[<c011a131>] enqueue_entity+0x1d2/0x1f3
[<c011a3ee>] __check_preempt_curr_fair+0x4d/0x7e
[<c011dda8>] check_preempt_curr_fair+0x6b/0x71
[<c0119c2c>] balance_tasks+0xe1/0x10b
[<c0119cbd>] load_balance_fair+0x67/0x78
[<c011ddae>] load_balance_start_fair+0x0/0x21
[<c011a2a2>] load_balance_next_fair+0x0/0x21
[<c01198ac>] update_stats_wait_end+0x9b/0xbe
[<c0103038>] __switch_to+0x23/0x13f
[<c02771f0>] __reacquire_kernel_lock+0x43/0x4b
[<c0275247>] __sched_text_start+0x5d7/0x5f1
[<c01ac9f4>] __next_cpu+0x12/0x21
[<c011ae0f>] find_busiest_group+0x1c4/0x547
[<c02770b7>] _spin_unlock_irqrestore+0xf/0x23
[<c016d56e>] __d_lookup+0xee/0x10b
[<c0164da6>] do_lookup+0x4f/0x140
[<f89c4c81>] uvc_v4l2_do_ioctl+0xc47/0xcd6 [uvcvideo]
[<f89c403a>] uvc_v4l2_do_ioctl+0x0/0xcd6 [uvcvideo]
[<c0170c22>] mntput_no_expire+0x11/0x63
[<f8a57fc1>] pwc_camera_power+0x6d/0x76 [pwc]
[<c02761dd>] __mutex_lock_slowpath+0x212/0x21a
[<f898cb67>] video_usercopy+0x178/0x23d [videodev]
[<c015d58a>] nameidata_to_filp+0x24/0x33
[<c015d5cb>] do_filp_open+0x32/0x39
[<f8a57fc1>] pwc_camera_power+0x6d/0x76 [pwc]
[<f89c3bb9>] uvc_v4l2_ioctl+0x3b/0x41 [uvcvideo]
[<f89c403a>] uvc_v4l2_do_ioctl+0x0/0xcd6 [uvcvideo]
[<c0168954>] do_ioctl+0x4c/0x62
[<c0168b98>] vfs_ioctl+0x22e/0x240
[<c0168bdd>] sys_ioctl+0x33/0x4a
[<c0103f66>] sysenter_past_esp+0x5f/0x85
[<c027007b>] unix_seq_start+0x2b/0x5a
=======================
Cheers,
Chris
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