* removing usb debug cable triggers lockdep warning.
@ 2014-01-31 21:11 Dave Jones
2014-02-01 8:45 ` Greg KH
0 siblings, 1 reply; 2+ messages in thread
From: Dave Jones @ 2014-01-31 21:11 UTC (permalink / raw)
To: gregkh; +Cc: Linux Kernel
usb 3-3: USB disconnect, device number 2
console [ttyUSB0] disabled
debug ttyUSB0: debug converter now disconnected from ttyUSB0
usb_debug 3-3:1.0: device disconnected
INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 3 PID: 66 Comm: khubd Not tainted 3.13.0+ #104
ffffffffbb28cf50 000000000f74f0eb ffff880242eb3a08 ffffffffba73a377
ffff880243741740 ffff880242eb3a18 ffffffffba7368b9 ffff880242eb3a90
ffffffffba0c1560 0000000000000003 ffff880242eb2000 ffff880242eb3aa8
Call Trace:
[<ffffffffba73a377>] dump_stack+0x4e/0x7a
[<ffffffffba7368b9>] register_lock_class.part.21+0x38/0x3c
[<ffffffffba0c1560>] __lock_acquire.isra.28+0xa10/0xa50
[<ffffffffba0c1cfd>] lock_acquire+0x8d/0x120
[<ffffffffba24ba88>] ? kernfs_addrm_finish+0x38/0x60
[<ffffffffba24acde>] kernfs_deactivate+0x10e/0x150
[<ffffffffba24ba88>] ? kernfs_addrm_finish+0x38/0x60
[<ffffffffba24ba88>] kernfs_addrm_finish+0x38/0x60
[<ffffffffba24bd00>] kernfs_remove_by_name_ns+0x60/0xc0
[<ffffffffba2498d1>] remove_files.isra.1+0x41/0x80
[<ffffffffba249bc7>] sysfs_remove_group+0x47/0xa0
[<ffffffffba249cf3>] sysfs_remove_groups+0x33/0x50
[<ffffffffba4ded6d>] device_remove_attrs+0x4d/0x80
[<ffffffffba4df9ae>] device_del+0x12e/0x1d0
[<ffffffffba53ce08>] usb_disconnect+0x138/0x1d0
[<ffffffffba540153>] hub_thread+0x723/0x1700
[<ffffffffba09d7c4>] ? finish_task_switch+0x44/0x190
[<ffffffffba0ba030>] ? wake_up_atomic_t+0x30/0x30
[<ffffffffba53fa30>] ? usb_reset_device+0x1d0/0x1d0
[<ffffffffba093dcc>] kthread+0xfc/0x120
[<ffffffffba093cd0>] ? kthread_create_on_node+0x230/0x230
[<ffffffffba74d96c>] ret_from_fork+0x7c/0xb0
[<ffffffffba093cd0>] ? kthread_create_on_node+0x230/0x230
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: removing usb debug cable triggers lockdep warning.
2014-01-31 21:11 removing usb debug cable triggers lockdep warning Dave Jones
@ 2014-02-01 8:45 ` Greg KH
0 siblings, 0 replies; 2+ messages in thread
From: Greg KH @ 2014-02-01 8:45 UTC (permalink / raw)
To: Dave Jones, Linux Kernel
On Fri, Jan 31, 2014 at 04:11:18PM -0500, Dave Jones wrote:
> usb 3-3: USB disconnect, device number 2
> console [ttyUSB0] disabled
> debug ttyUSB0: debug converter now disconnected from ttyUSB0
> usb_debug 3-3:1.0: device disconnected
> INFO: trying to register non-static key.
> the code is fine but needs lockdep annotation.
> turning off the locking correctness validator.
> CPU: 3 PID: 66 Comm: khubd Not tainted 3.13.0+ #104
> ffffffffbb28cf50 000000000f74f0eb ffff880242eb3a08 ffffffffba73a377
> ffff880243741740 ffff880242eb3a18 ffffffffba7368b9 ffff880242eb3a90
> ffffffffba0c1560 0000000000000003 ffff880242eb2000 ffff880242eb3aa8
> Call Trace:
> [<ffffffffba73a377>] dump_stack+0x4e/0x7a
> [<ffffffffba7368b9>] register_lock_class.part.21+0x38/0x3c
> [<ffffffffba0c1560>] __lock_acquire.isra.28+0xa10/0xa50
> [<ffffffffba0c1cfd>] lock_acquire+0x8d/0x120
> [<ffffffffba24ba88>] ? kernfs_addrm_finish+0x38/0x60
> [<ffffffffba24acde>] kernfs_deactivate+0x10e/0x150
> [<ffffffffba24ba88>] ? kernfs_addrm_finish+0x38/0x60
> [<ffffffffba24ba88>] kernfs_addrm_finish+0x38/0x60
> [<ffffffffba24bd00>] kernfs_remove_by_name_ns+0x60/0xc0
> [<ffffffffba2498d1>] remove_files.isra.1+0x41/0x80
> [<ffffffffba249bc7>] sysfs_remove_group+0x47/0xa0
> [<ffffffffba249cf3>] sysfs_remove_groups+0x33/0x50
> [<ffffffffba4ded6d>] device_remove_attrs+0x4d/0x80
> [<ffffffffba4df9ae>] device_del+0x12e/0x1d0
> [<ffffffffba53ce08>] usb_disconnect+0x138/0x1d0
> [<ffffffffba540153>] hub_thread+0x723/0x1700
> [<ffffffffba09d7c4>] ? finish_task_switch+0x44/0x190
> [<ffffffffba0ba030>] ? wake_up_atomic_t+0x30/0x30
> [<ffffffffba53fa30>] ? usb_reset_device+0x1d0/0x1d0
> [<ffffffffba093dcc>] kthread+0xfc/0x120
> [<ffffffffba093cd0>] ? kthread_create_on_node+0x230/0x230
> [<ffffffffba74d96c>] ret_from_fork+0x7c/0xb0
> [<ffffffffba093cd0>] ? kthread_create_on_node+0x230/0x230
Yeah, I have a patch from Tejun to queue up after 3.14-rc1 is out to fix
this issue, sorry for the noise.
greg k-h
^ permalink raw reply [flat|nested] 2+ messages in thread
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