I only just recently acquired a Hauppauge HVR-1600 cards, and at least both
2.6.39 and 3.0-rc4 kernels with copious debug spew enabled spit out the
lockdep spew included below. Haven't looked into it at all yet, but I
thought I'd ask before I do if it is already a known issue.
[ 11.856504] Linux video capture interface: v2.00
[ 12.306435] cx18: Start initialization, version 1.5.0
[ 12.308789] cx18-0: Initializing card 0
[ 12.310751] cx18-0: Autodetected Hauppauge card
[ 12.313403] cx18 0000:02:04.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18
[ 12.346552] cx18-0: cx23418 revision 01010000 (B)
[ 12.437931]
[ 12.437933] =============================================
[ 12.438014] [ INFO: possible recursive locking detected ]
[ 12.438014] 3.0.0-rc4+ #15
[ 12.438014] ---------------------------------------------
[ 12.438014] work_for_cpu/743 is trying to acquire lock:
[ 12.438014] (&hdl->lock){+.+.+.}, at: [<ffffffffa02403e2>] handler_new_ref+0xe9/0x183 [videodev]
[ 12.438014]
[ 12.438014] but task is already holding lock:
[ 12.438014] (&hdl->lock){+.+.+.}, at: [<ffffffffa02404c5>] v4l2_ctrl_add_handler+0x49/0x8e [videodev]
[ 12.438014]
[ 12.438014] other info that might help us debug this:
[ 12.438014] Possible unsafe locking scenario:
[ 12.438014]
[ 12.438014] CPU0
[ 12.438014] ----
[ 12.438014] lock(&hdl->lock);
[ 12.438014] lock(&hdl->lock);
[ 12.438014]
[ 12.438014] *** DEADLOCK ***
[ 12.438014]
[ 12.438014] May be due to missing lock nesting notation
[ 12.438014]
[ 12.438014] 1 lock held by work_for_cpu/743:
[ 12.438014] #0: (&hdl->lock){+.+.+.}, at: [<ffffffffa02404c5>] v4l2_ctrl_add_handler+0x49/0x8e [videodev]
[ 12.438014]
[ 12.438014] stack backtrace:
[ 12.438014] Pid: 743, comm: work_for_cpu Not tainted 3.0.0-rc4+ #15
[ 12.438014] Call Trace:
[ 12.438014] [<ffffffff81087815>] __lock_acquire+0x917/0xcf7
[ 12.438014] [<ffffffff810849d6>] ? trace_hardirqs_off+0xd/0xf
[ 12.438014] [<ffffffff81084f1a>] ? lock_release_holdtime.part.8+0x6b/0x72
[ 12.438014] [<ffffffffa02403e2>] ? handler_new_ref+0xe9/0x183 [videodev]
[ 12.438014] [<ffffffff81088082>] lock_acquire+0xbf/0x103
[ 12.438014] [<ffffffffa02403e2>] ? handler_new_ref+0xe9/0x183 [videodev]
[ 12.438014] [<ffffffff81088358>] ? mark_held_locks+0x4b/0x6d
[ 12.438014] [<ffffffffa02403e2>] ? handler_new_ref+0xe9/0x183 [videodev]
[ 12.438014] [<ffffffff814c9ae2>] __mutex_lock_common+0x4c/0x361
[ 12.438014] [<ffffffffa02403e2>] ? handler_new_ref+0xe9/0x183 [videodev]
[ 12.438014] [<ffffffffa024026d>] ? kzalloc.constprop.15+0x13/0x15 [videodev]
[ 12.438014] [<ffffffff811241f1>] ? __kmalloc+0xfa/0x10c
[ 12.438014] [<ffffffff814c9f06>] mutex_lock_nested+0x40/0x45
[ 12.438014] [<ffffffffa02403e2>] handler_new_ref+0xe9/0x183 [videodev]
[ 12.438014] [<ffffffffa02404e0>] v4l2_ctrl_add_handler+0x64/0x8e [videodev]
[ 12.438014] [<ffffffffa023d6c5>] v4l2_device_register_subdev+0xcb/0x141 [videodev]
[ 12.438014] [<ffffffffa0291e64>] cx18_av_probe+0x291/0x2bd [cx18]
[ 12.438014] [<ffffffff814ca03b>] ? mutex_unlock+0xe/0x10
[ 12.438014] [<ffffffffa0295623>] cx18_probe+0xd43/0x1343 [cx18]
[ 12.438014] [<ffffffff814cb5f8>] ? _raw_spin_unlock_irqrestore+0x45/0x52
[ 12.438014] [<ffffffff814cb600>] ? _raw_spin_unlock_irqrestore+0x4d/0x52
[ 12.438014] [<ffffffff8106d0b8>] ? move_linked_works+0x6e/0x6e
[ 12.438014] [<ffffffff812720b2>] local_pci_probe+0x44/0x75
[ 12.438014] [<ffffffff8106d0ce>] do_work_for_cpu+0x16/0x28
[ 12.438014] [<ffffffff8107344d>] kthread+0xa8/0xb0
[ 12.438014] [<ffffffff814d3324>] kernel_thread_helper+0x4/0x10
[ 12.438014] [<ffffffff814cb9d4>] ? retint_restore_args+0x13/0x13
[ 12.438014] [<ffffffff810733a5>] ? __init_kthread_worker+0x5a/0x5a[ 12.438014] [<ffffffff814d3320>] ? gs_change+0x13/0x13
[ 12.663073] tveeprom 6-0050: Hauppauge model 74021, rev C1B2, serial# 1561046[ 12.664488] tveeprom 6-0050: MAC address is 00:0d:fe:17:d1:d6
[ 12.665871] tveeprom 6-0050: tuner model is TCL M2523_5N_E (idx 112, type 50)
[ 12.667299] tveeprom 6-0050: TV standards NTSC(M) (eeprom 0x08)
[ 12.668749] tveeprom 6-0050: audio processor is CX23418 (idx 38)
[ 12.670207] tveeprom 6-0050: decoder processor is CX23418 (idx 31)
[ 12.671694] tveeprom 6-0050: has no radio, has IR receiver, has IR transmitter
[ 12.673218] cx18-0: Autodetected Hauppauge HVR-1600
[ 12.674752] cx18-0: Simultaneous Digital and Analog TV capture supported[ 12.824476] i2c-core: driver [tuner] using legacy suspend method
[ 12.826135] i2c-core: driver [tuner] using legacy resume method
[ 12.843402] tuner 7-0061: Tuner -1 found with type(s) Radio TV.
[ 12.878152] cs5345 6-004c: chip found @ 0x98 (cx18 i2c driver #0-0)
[ 12.952064] tuner-simple 7-0061: creating new instance
[ 12.953712] tuner-simple 7-0061: type set to 50 (TCL 2002N)
[ 12.967854] cx18-0: Registered device video0 for encoder MPEG (64 x 32.00 kB)
[ 12.969552] DVB: registering new adapter (cx18)
[ 13.157923] MXL5005S: Attached at address 0x63
[ 13.159569] DVB: registering adapter 0 frontend 0 (Samsung S5H1409 QAM/8VSB Frontend)...
[ 13.161557] cx18-0: DVB Frontend registered
[ 13.163239] cx18-0: Registered DVB adapter0 for TS (32 x 32.00 kB)
[ 13.165079] cx18-0: Registered device video32 for encoder YUV (20 x 101.25 kB)
[ 13.166889] cx18-0: Registered device vbi0 for encoder VBI (20 x 51984 bytes)
[ 13.168708] cx18-0: Registered device video24 for encoder PCM audio (256 x 4.00 kB)
[ 13.170407] cx18-0: Initialized card: Hauppauge HVR-1600
[ 13.172251] cx18: End initialization
[ 13.387206] cx18-0: loaded v4l-cx23418-cpu.fw firmware (158332 bytes)
[ 13.551919] cx18-0: loaded v4l-cx23418-apu.fw firmware V00120000 (141200 bytes)
[ 13.560280] cx18-0: FW version: 0.0.74.0 (Release 2007/03/12)
[ 13.571169] cx18-alsa: module loading...
[ 14.477034] cx18-0 843: loaded v4l-cx23418-dig.fw firmware (16382 bytes)
[ 14.503906] cx18-0 843: verified load of v4l-cx23418-dig.fw firmware (16382 bytes)
--
Jarod Wilson
jarod@xxxxxxxxxxxx
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