Hi,
I get a lockdep splat with kernels 3.17-rc1 and newer for the
nuvoton-cir driver on my Intel NUC D54250. The driver was working
correctly with Linux 3.16, after upgrading it does not react to any
input anymore although loading seems to be succesful.
If you have any ideas on this issue I can help out with debugging/testing.
Tomas
[ 4.962509] Registered IR keymap rc-rc6-mce
[ 4.963166] input: Nuvoton w836x7hg Infrared Remote Transceiver as
/devices/pnp0/00:05/rc/rc0/input6
[ 4.963656] rc0: Nuvoton w836x7hg Infrared Remote Transceiver as
/devices/pnp0/00:05/rc/rc0
[ 4.965433] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 4.966211] input: MCE IR Keyboard/Mouse (nuvoton-cir) as
/devices/virtual/input/input7
[ 4.966222]
[ 4.966266] ======================================================
[ 4.966317] [ INFO: possible circular locking dependency detected ]
[ 4.966371] 3.17.0-rc2 #12 Not tainted
[ 4.966417] -------------------------------------------------------
[ 4.966469] modprobe/642 is trying to acquire lock:
[ 4.966518] (input_mutex){+.+.+.}, at: [<ffffffff812ef338>]
input_register_device+0x2ba/0x381
[ 4.966729]
[ 4.966729] but task is already holding lock:
[ 4.966779] (ir_raw_handler_lock){+.+.+.}, at: [<ffffffff8131a249>]
ir_raw_event_register+0x102/0x190
[ 4.966990]
[ 4.966990] which lock already depends on the new lock.
[ 4.966990]
[ 4.967060]
[ 4.967060] the existing dependency chain (in reverse order) is:
[ 4.967144]
[ 4.967144] -> #3 (ir_raw_handler_lock){+.+.+.}:
[ 4.967386] [<ffffffff81075c29>] lock_acquire+0xd9/0x111
[ 4.967501] [<ffffffff8148fb86>] mutex_lock_nested+0x57/0x37a
[ 4.967616] [<ffffffff8131a249>] ir_raw_event_register+0x102/0x190
[ 4.967731] [<ffffffff8131999c>] rc_register_device+0x39e/0x58a
[ 4.967846] [<ffffffffa02cc2e3>] nvt_probe+0x5ad/0xd52
[nuvoton_cir]
[ 4.967963] [<ffffffff81297b4f>] pnp_device_probe+0x8c/0xa9
[ 4.968079] [<ffffffff812d3b56>] driver_probe_device+0xa1/0x1e3
[ 4.968195] [<ffffffff812d3ce6>] __driver_attach+0x4e/0x6f
[ 4.968309] [<ffffffff812d2277>] bus_for_each_dev+0x5a/0x8c
[ 4.968425] [<ffffffff812d3640>] driver_attach+0x19/0x1b
[ 4.968529] [<ffffffff812d3395>] bus_add_driver+0xf1/0x1d6
[ 4.968633] [<ffffffff812d4333>] driver_register+0x87/0xbe
[ 4.968737] [<ffffffff812978f0>] pnp_register_driver+0x1c/0x1e
[ 4.968842] [<ffffffffa02d1010>] nvt_init+0x10/0x1000
[nuvoton_cir]
[ 4.968948] [<ffffffff8100030e>] do_one_initcall+0xea/0x18c
[ 4.969054] [<ffffffff810a4cad>] load_module+0x1c21/0x1f2c
[ 4.969159] [<ffffffff810a505a>] SyS_init_module+0xa2/0xb1
[ 4.969263] [<ffffffff81492752>] system_call_fastpath+0x16/0x1b
[ 4.969384]
[ 4.969384] -> #2 (&dev->lock){+.+.+.}:
[ 4.969625] [<ffffffff81075c29>] lock_acquire+0xd9/0x111
[ 4.969739] [<ffffffff8148fb86>] mutex_lock_nested+0x57/0x37a
[ 4.969853] [<ffffffff8131841d>] rc_open+0x24/0x70
[ 4.969966] [<ffffffff81318479>] ir_open+0x10/0x12
[ 4.970078] [<ffffffff812edc20>] input_open_device+0x64/0x91
[ 4.970193] [<ffffffff812b0032>] kbd_connect+0x55/0x87
[ 4.970307] [<ffffffff812eefae>] input_attach_handler+0x1aa/0x1dc
[ 4.970425] [<ffffffff812ef37d>] input_register_device+0x2ff/0x381
[ 4.970530] [<ffffffff81319b4e>] rc_register_device+0x550/0x58a
[ 4.970635] [<ffffffffa02cc2e3>] nvt_probe+0x5ad/0xd52
[nuvoton_cir]
[ 4.970742] [<ffffffff81297b4f>] pnp_device_probe+0x8c/0xa9
[ 4.970846] [<ffffffff812d3b56>] driver_probe_device+0xa1/0x1e3
[ 4.970951] [<ffffffff812d3ce6>] __driver_attach+0x4e/0x6f
[ 4.971055] [<ffffffff812d2277>] bus_for_each_dev+0x5a/0x8c
[ 4.971159] [<ffffffff812d3640>] driver_attach+0x19/0x1b
[ 4.971263] [<ffffffff812d3395>] bus_add_driver+0xf1/0x1d6
[ 4.971378] [<ffffffff812d4333>] driver_register+0x87/0xbe
[ 4.971491] [<ffffffff812978f0>] pnp_register_driver+0x1c/0x1e
[ 4.971606] [<ffffffffa02d1010>] nvt_init+0x10/0x1000
[nuvoton_cir]
[ 4.971722] [<ffffffff8100030e>] do_one_initcall+0xea/0x18c
[ 4.971837] [<ffffffff810a4cad>] load_module+0x1c21/0x1f2c
[ 4.971950] [<ffffffff810a505a>] SyS_init_module+0xa2/0xb1
[ 4.972063] [<ffffffff81492752>] system_call_fastpath+0x16/0x1b
[ 4.972178]
[ 4.972178] -> #1 (&dev->mutex#2){+.+...}:
[ 4.972462] [<ffffffff81075c29>] lock_acquire+0xd9/0x111
[ 4.972566] [<ffffffff8148ff00>]
mutex_lock_interruptible_nested+0x57/0x381
[ 4.972688] [<ffffffff812ed778>] input_register_handle+0x2c/0xbf
[ 4.972794] [<ffffffff812f2466>] mousedev_create+0x244/0x2c7
[ 4.972898] [<ffffffff812f25e1>] mousedev_connect+0x1b/0xd2
[ 4.973003] [<ffffffff812eefae>] input_attach_handler+0x1aa/0x1dc
[ 4.973107] [<ffffffff812ef37d>] input_register_device+0x2ff/0x381
[ 4.973213] [<ffffffff8132e535>] hidinput_connect+0x30ec/0x316c
[ 4.973319] [<ffffffff8132a924>] hid_connect+0x6e/0x26f
[ 4.973440] [<ffffffff8132abfa>] hid_device_probe+0xd5/0x14b
[ 4.973554] [<ffffffff812d3b56>] driver_probe_device+0xa1/0x1e3
[ 4.973669] [<ffffffff812d3d2c>] __device_attach+0x25/0x38
[ 4.973782] [<ffffffff812d21e1>] bus_for_each_drv+0x52/0x8e
[ 4.973896] [<ffffffff812d3a78>] device_attach+0x69/0x8a
[ 4.974009] [<ffffffff812d30fe>] bus_probe_device+0x33/0xb5
[ 4.974123] [<ffffffff812d1658>] device_add+0x38a/0x532
[ 4.974235] [<ffffffff8132a87a>] hid_add_device+0x1c2/0x1fe
[ 4.974349] [<ffffffffa00fd1c2>] usbhid_probe+0x374/0x3bd [usbhid]
[ 4.974468] [<ffffffffa003a426>]
usb_probe_interface+0x143/0x1da [usbcore]
[ 4.974598] [<ffffffff812d3b56>] driver_probe_device+0xa1/0x1e3
[ 4.974703] [<ffffffff812d3ce6>] __driver_attach+0x4e/0x6f
[ 4.974807] [<ffffffff812d2277>] bus_for_each_dev+0x5a/0x8c
[ 4.974912] [<ffffffff812d3640>] driver_attach+0x19/0x1b
[ 4.975016] [<ffffffff812d3395>] bus_add_driver+0xf1/0x1d6
[ 4.975120] [<ffffffff812d4333>] driver_register+0x87/0xbe
[ 4.975225] [<ffffffffa003911c>]
usb_register_driver+0x9f/0x14b [usbcore]
[ 4.975353] [<ffffffffa001d032>]
crc_t10dif_generic+0x32/0x1000 [crct10dif_common]
[ 4.975478] [<ffffffff8100030e>] do_one_initcall+0xea/0x18c
[ 4.975584] [<ffffffff810a4cad>] load_module+0x1c21/0x1f2c
[ 4.975688] [<ffffffff810a505a>] SyS_init_module+0xa2/0xb1
[ 4.975793] [<ffffffff81492752>] system_call_fastpath+0x16/0x1b
[ 4.975901]
[ 4.975901] -> #0 (input_mutex){+.+.+.}:
[ 4.976139] [<ffffffff8107537b>] __lock_acquire+0xb54/0xeda
[ 4.976271] [<ffffffff81075c29>] lock_acquire+0xd9/0x111
[ 4.976383] [<ffffffff8148ff00>]
mutex_lock_interruptible_nested+0x57/0x381
[ 4.976512] [<ffffffff812ef338>] input_register_device+0x2ba/0x381
[ 4.976624] [<ffffffff8131c093>] ir_mce_kbd_register+0x109/0x139
[ 4.976737] [<ffffffff8131a284>] ir_raw_event_register+0x13d/0x190
[ 4.976847] [<ffffffff8131999c>] rc_register_device+0x39e/0x58a
[ 4.976957] [<ffffffffa02cc2e3>] nvt_probe+0x5ad/0xd52
[nuvoton_cir]
[ 4.977064] [<ffffffff81297b4f>] pnp_device_probe+0x8c/0xa9
[ 4.977170] [<ffffffff812d3b56>] driver_probe_device+0xa1/0x1e3
[ 4.977276] [<ffffffff812d3ce6>] __driver_attach+0x4e/0x6f
[ 4.977381] [<ffffffff812d2277>] bus_for_each_dev+0x5a/0x8c
[ 4.977485] [<ffffffff812d3640>] driver_attach+0x19/0x1b
[ 4.977590] [<ffffffff812d3395>] bus_add_driver+0xf1/0x1d6
[ 4.977694] [<ffffffff812d4333>] driver_register+0x87/0xbe
[ 4.977799] [<ffffffff812978f0>] pnp_register_driver+0x1c/0x1e
[ 4.977905] [<ffffffffa02d1010>] nvt_init+0x10/0x1000
[nuvoton_cir]
[ 4.978012] [<ffffffff8100030e>] do_one_initcall+0xea/0x18c
[ 4.978118] [<ffffffff810a4cad>] load_module+0x1c21/0x1f2c
[ 4.978224] [<ffffffff810a505a>] SyS_init_module+0xa2/0xb1
[ 4.978335] [<ffffffff81492752>] system_call_fastpath+0x16/0x1b
[ 4.978448]
[ 4.978448] other info that might help us debug this:
[ 4.978448]
[ 4.978552] Chain exists of:
[ 4.978552] input_mutex --> &dev->lock --> ir_raw_handler_lock
[ 4.978552]
[ 4.978875] Possible unsafe locking scenario:
[ 4.978875]
[ 4.978955] CPU0 CPU1
[ 4.979018] ---- ----
[ 4.979080] lock(ir_raw_handler_lock);
[ 4.979215] lock(&dev->lock);
[ 4.979355] lock(ir_raw_handler_lock);
[ 4.979496] lock(input_mutex);
[ 4.979629]
[ 4.979629] *** DEADLOCK ***
[ 4.979629]
[ 4.979725] 4 locks held by modprobe/642:
[ 4.979786] #0: (&dev->mutex){......}, at: [<ffffffff812d350f>]
device_lock+0xf/0x11
[ 4.980060] #1: (&dev->mutex){......}, at: [<ffffffff812d350f>]
device_lock+0xf/0x11
[ 4.980332] #2: (&dev->lock){+.+.+.}, at: [<ffffffff81319b5b>]
rc_register_device+0x55d/0x58a
[ 4.980635] #3: (ir_raw_handler_lock){+.+.+.}, at:
[<ffffffff8131a249>] ir_raw_event_register+0x102/0x190
[ 4.980932]
[ 4.980932] stack backtrace:
[ 4.981019] CPU: 0 PID: 642 Comm: modprobe Not tainted 3.17.0-rc2 #12
[ 4.981093] Hardware name: /D54250WYK, BIOS
WYLPT10H.86A.0027.2014.0710.1904 07/10/2014
[ 4.981192] ffffffff820708b0 ffff880215f27838 ffffffff8148b61a
0000000000001d64
[ 4.981448] ffffffff8203a2c0 ffff880215f27888 ffffffff81488f49
0000000000000004
[ 4.981681] ffff88003686e890 ffff880215f27888 ffff88003686e890
ffff88003686f0b8
[ 4.981913] Call Trace:
[ 4.981975] [<ffffffff8148b61a>] dump_stack+0x46/0x58
[ 4.982041] [<ffffffff81488f49>] print_circular_bug+0x1f8/0x209
[ 4.982109] [<ffffffff8107537b>] __lock_acquire+0xb54/0xeda
[ 4.982175] [<ffffffff81081f6f>] ? console_unlock+0x34d/0x399
[ 4.982243] [<ffffffff81075c29>] lock_acquire+0xd9/0x111
[ 4.982309] [<ffffffff812ef338>] ? input_register_device+0x2ba/0x381
[ 4.982389] [<ffffffff8148ff00>]
mutex_lock_interruptible_nested+0x57/0x381
[ 4.982466] [<ffffffff812ef338>] ? input_register_device+0x2ba/0x381
[ 4.982543] [<ffffffff811268d7>] ? kfree+0x7c/0x96
[ 4.982614] [<ffffffff812ef338>] ? input_register_device+0x2ba/0x381
[ 4.982691] [<ffffffff81073559>] ? trace_hardirqs_on+0xd/0xf
[ 4.982764] [<ffffffff812ef338>] input_register_device+0x2ba/0x381
[ 4.982840] [<ffffffff8131c093>] ir_mce_kbd_register+0x109/0x139
[ 4.982914] [<ffffffff8131a284>] ir_raw_event_register+0x13d/0x190
[ 4.982989] [<ffffffff8131999c>] rc_register_device+0x39e/0x58a
[ 4.983065] [<ffffffff81073559>] ? trace_hardirqs_on+0xd/0xf
[ 4.983141] [<ffffffffa02cc2e3>] nvt_probe+0x5ad/0xd52 [nuvoton_cir]
[ 4.983219] [<ffffffffa02cbd36>] ? nvt_resume+0x80/0x80 [nuvoton_cir]
[ 4.983296] [<ffffffff81297b4f>] pnp_device_probe+0x8c/0xa9
[ 4.983379] [<ffffffff812d36b0>] ? driver_sysfs_add+0x6e/0x93
[ 4.983446] [<ffffffff812d3b56>] driver_probe_device+0xa1/0x1e3
[ 4.983513] [<ffffffff812d3c98>] ? driver_probe_device+0x1e3/0x1e3
[ 4.983581] [<ffffffff812d3ce6>] __driver_attach+0x4e/0x6f
[ 4.983647] [<ffffffff812d2277>] bus_for_each_dev+0x5a/0x8c
[ 4.983713] [<ffffffff812d3640>] driver_attach+0x19/0x1b
[ 4.983779] [<ffffffff812d3395>] bus_add_driver+0xf1/0x1d6
[ 4.983845] [<ffffffff812d4333>] driver_register+0x87/0xbe
[ 4.983913] [<ffffffffa02d1000>] ? 0xffffffffa02d1000
[ 4.983979] [<ffffffff812978f0>] pnp_register_driver+0x1c/0x1e
[ 4.984046] [<ffffffffa02d1010>] nvt_init+0x10/0x1000 [nuvoton_cir]
[ 4.984115] [<ffffffff8100030e>] do_one_initcall+0xea/0x18c
[ 4.984183] [<ffffffff81116837>] ? __vunmap+0x9d/0xc7
[ 4.984248] [<ffffffff810a4cad>] load_module+0x1c21/0x1f2c
[ 4.986190] [<ffffffff810a1bda>] ? show_initstate+0x44/0x44
[ 4.986257] [<ffffffff810a505a>] SyS_init_module+0xa2/0xb1
[ 4.986323] [<ffffffff81492752>] system_call_fastpath+0x16/0x1b
[ 4.986802] nuvoton_cir: driver has been successfully loaded
[ 5.092836] lirc_dev: IR Remote Control driver registered, major 250
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