Hi all,

The attachment is the full dmesg. Key section follow:

[  133.276235]
[  133.276243] =========================================================
[  133.276253] [ INFO: possible irq lock inversion dependency detected ]
[  133.276262] 2.6.29-g14-rfkill-nophy-ledon-03652-g5d80f8e #87
[  133.276268] ---------------------------------------------------------
[  133.276274] swapper/0 just changed the state of lock:
[  133.276281]  (fasync_lock){..+.}, at: [<c01b7107>] kill_fasync+0x27/0x50
[  133.276303] but this lock took another, hard-irq-unsafe lock in the past:
[  133.276310]  (&f->f_lock){--..}
[  133.276316]
[  133.276317] and interrupts could create inverse lock ordering between them.
[  133.276321]
[  133.276326]
[  133.276327] other info that might help us debug this:
[  133.276334] 4 locks held by swapper/0:
[  133.276338]  #0:  (&serio->lock){++..}, at: [<c039c281>]
serio_interrupt+0x21/0x80
[  133.276358]  #1:  (&dev->event_lock){++..}, at: [<c03a0ac0>]
input_event+0x40/0x70
[  133.276373]  #2:  (rcu_read_lock){..--}, at: [<c039f220>]
input_pass_event+0x0/0xf0
[  133.276390]  #3:  (rcu_read_lock){..--}, at: [<c03a3be0>]
evdev_event+0x0/0x110
[  133.276407]
[  133.276408] the first lock's dependencies:
[  133.276413] -> (fasync_lock){..+.} ops: 0 {
[  133.276425]    initial-use  at:
[  133.276432]                                        [<c0153761>]
__lock_acquire+0x151/0x1920
[  133.276448]                                        [<c0154f8e>]
lock_acquire+0x5e/0x80
[  133.276459]                                        [<c0506293>]
_write_lock_irq+0x43/0x50
[  133.276472]                                        [<c01b6b84>]
fasync_helper+0x24/0x140
[  133.276483]                                        [<c02d5775>]
tty_fasync+0x65/0x120
[  133.276494]                                        [<c02d7e66>]
tty_release_dev+0x66/0x4f0
[  133.276505]                                        [<c02d8302>]
tty_release+0x12/0x20
[  133.276514]                                        [<c01abe32>]
__fput+0xc2/0x1b0
[  133.276526]                                        [<c01abf3f>]
fput+0x1f/0x30
[  133.276536]                                        [<c01a8e17>]
filp_close+0x47/0x70
[  133.276548]                                        [<c01a8eb0>]
sys_close+0x70/0xd0
[  133.276558]                                        [<c010351a>]
syscall_call+0x7/0xb
[  133.276570]                                        [<ffffffff>] 0xffffffff
[  133.276582]    in-hardirq-R at:
[  133.276587]                                        [<c0153d0c>]
__lock_acquire+0x6fc/0x1920
[  133.276598]                                        [<c0154f8e>]
lock_acquire+0x5e/0x80
[  133.276608]                                        [<c050643d>]
_read_lock+0x3d/0x50
[  133.276618]                                        [<c01b7107>]
kill_fasync+0x27/0x50
[  133.276629]                                        [<c03a38ef>]
evdev_pass_event+0x6f/0x80
[  133.276638]                                        [<c03a3c52>]
evdev_event+0x72/0x110
[  133.276648]                                        [<c039f284>]
input_pass_event+0x64/0xf0
[  133.276659]                                        [<c039f70d>]
input_handle_event+0x7d/0x420
[  133.276670]                                        [<c03a0ae0>]
input_event+0x60/0x70
[  133.276679]                                        [<c03a87a6>]
synaptics_process_byte+0x476/0x860
[  133.276692]                                        [<c03a6a7f>]
psmouse_handle_byte+0xf/0x110
[  133.276703]                                        [<c03a7874>]
psmouse_interrupt+0xc4/0x2b0
[  133.276714]                                        [<c039c29b>]
serio_interrupt+0x3b/0x80
[  133.276724]                                        [<c039d2e3>]
i8042_interrupt+0xb3/0x250
[  133.276735]                                        [<c016f6d9>]
handle_IRQ_event+0x39/0xa0
[  133.276746]                                        [<c0170ded>]
handle_edge_irq+0xad/0x140
[  133.276756]                                        [<c0104f9b>]
do_IRQ+0x4b/0x90
[  133.276767]                                        [<c0103aac>]
common_interrupt+0x2c/0x34
[  133.276777]                                        [<c010966b>]
c1e_idle+0x9b/0x100
[  133.276788]                                        [<c0102370>]
cpu_idle+0x70/0xb0
[  133.276798]                                        [<c04f2547>]
rest_init+0x67/0x70
[  133.276809]                                        [<ffffffff>] 0xffffffff
[  133.276817]  }
[  133.276821]  ... key      at: [<c068f6c4>] fasync_lock+0x10/0x1c
[  133.276834]  -> (&f->f_lock){--..} ops: 0 {
[  133.276845]     initial-use  at:
[  133.276851]                                          [<c0153761>]
__lock_acquire+0x151/0x1920
[  133.276862]                                          [<c0154f8e>]
lock_acquire+0x5e/0x80
[  133.276872]                                          [<c050609d>]
_spin_lock+0x3d/0x50
[  133.276883]                                          [<c01b6bc8>]
fasync_helper+0x68/0x140
[  133.276893]                                          [<c02d5775>]
tty_fasync+0x65/0x120
[  133.276902]                                          [<c02d7e66>]
tty_release_dev+0x66/0x4f0
[  133.276912]                                          [<c02d8302>]
tty_release+0x12/0x20
[  133.276921]                                          [<c01abe32>]
__fput+0xc2/0x1b0
[  133.276931]                                          [<c01abf3f>]
fput+0x1f/0x30
[  133.276941]                                          [<c01a8e17>]
filp_close+0x47/0x70
[  133.276951]                                          [<c01a8eb0>]
sys_close+0x70/0xd0
[  133.276961]                                          [<c010351a>]
syscall_call+0x7/0xb
[  133.276970]                                          [<ffffffff>] 0xffffffff
[  133.276979]     softirq-on-W at:
[  133.276984]                                          [<c0153bed>]
__lock_acquire+0x5dd/0x1920
[  133.276995]                                          [<c0154f8e>]
lock_acquire+0x5e/0x80
[  133.277006]                                          [<c050609d>]
_spin_lock+0x3d/0x50
[  133.277016]                                          [<c01b7649>]
do_fcntl+0x329/0x3f0
[  133.277027]                                          [<c01b7752>]
sys_fcntl64+0x42/0x90
[  133.277037]                                          [<c010351a>]
syscall_call+0x7/0xb
[  133.277046]                                          [<ffffffff>] 0xffffffff
[  133.277054]     hardirq-on-W at:
[  133.277059]                                          [<c0153bc7>]
__lock_acquire+0x5b7/0x1920
[  133.277069]                                          [<c0154f8e>]
lock_acquire+0x5e/0x80
[  133.277079]                                          [<c050609d>]
_spin_lock+0x3d/0x50
[  133.277089]                                          [<c01b7649>]
do_fcntl+0x329/0x3f0
[  133.277099]                                          [<c01b7752>]
sys_fcntl64+0x42/0x90
[  133.277109]                                          [<c010351a>]
syscall_call+0x7/0xb
[  133.277118]                                          [<ffffffff>] 0xffffffff
[  133.277127]   }
[  133.277130]   ... key      at: [<c0b2c388>] __key.20023+0x0/0x8
[  133.277140]  ... acquired at:
[  133.277144]    [<c01545ab>] __lock_acquire+0xf9b/0x1920
[  133.277154]    [<c0154f8e>] lock_acquire+0x5e/0x80
[  133.277162]    [<c050609d>] _spin_lock+0x3d/0x50
[  133.277171]    [<c01b6bc8>] fasync_helper+0x68/0x140
[  133.277180]    [<c02d5775>] tty_fasync+0x65/0x120
[  133.277188]    [<c02d7e66>] tty_release_dev+0x66/0x4f0
[  133.277196]    [<c02d8302>] tty_release+0x12/0x20
[  133.277203]    [<c01abe32>] __fput+0xc2/0x1b0
[  133.277212]    [<c01abf3f>] fput+0x1f/0x30
[  133.277220]    [<c01a8e17>] filp_close+0x47/0x70
[  133.277228]    [<c01a8eb0>] sys_close+0x70/0xd0
[  133.277237]    [<c010351a>] syscall_call+0x7/0xb
[  133.277245]    [<ffffffff>] 0xffffffff
[  133.277252]
[  133.277255]
[  133.277256] the second lock's dependencies:
[  133.277261] -> (&f->f_lock){--..} ops: 0 {
[  133.277272]    initial-use  at:
[  133.277277]                                        [<c0153761>]
__lock_acquire+0x151/0x1920
[  133.277287]                                        [<c0154f8e>]
lock_acquire+0x5e/0x80
[  133.277297]                                        [<c050609d>]
_spin_lock+0x3d/0x50
[  133.277307]                                        [<c01b6bc8>]
fasync_helper+0x68/0x140
[  133.277317]                                        [<c02d5775>]
tty_fasync+0x65/0x120
[  133.277326]                                        [<c02d7e66>]
tty_release_dev+0x66/0x4f0
[  133.277336]                                        [<c02d8302>]
tty_release+0x12/0x20
[  133.277345]                                        [<c01abe32>]
__fput+0xc2/0x1b0
[  133.277355]                                        [<c01abf3f>]
fput+0x1f/0x30
[  133.277365]                                        [<c01a8e17>]
filp_close+0x47/0x70
[  133.277375]                                        [<c01a8eb0>]
sys_close+0x70/0xd0
[  133.277384]                                        [<c010351a>]
syscall_call+0x7/0xb
[  133.277394]                                        [<ffffffff>] 0xffffffff
[  133.277402]    softirq-on-W at:
[  133.277408]                                        [<c0153bed>]
__lock_acquire+0x5dd/0x1920
[  133.277418]                                        [<c0154f8e>]
lock_acquire+0x5e/0x80
[  133.277429]                                        [<c050609d>]
_spin_lock+0x3d/0x50
[  133.277439]                                        [<c01b7649>]
do_fcntl+0x329/0x3f0
[  133.277449]                                        [<c01b7752>]
sys_fcntl64+0x42/0x90
[  133.277459]                                        [<c010351a>]
syscall_call+0x7/0xb
[  133.277468]                                        [<ffffffff>] 0xffffffff
[  133.277476]    hardirq-on-W at:
[  133.277482]                                        [<c0153bc7>]
__lock_acquire+0x5b7/0x1920
[  133.277492]                                        [<c0154f8e>]
lock_acquire+0x5e/0x80
[  133.277504]                                        [<c050609d>]
_spin_lock+0x3d/0x50
[  133.277514]                                        [<c01b7649>]
do_fcntl+0x329/0x3f0
[  133.277524]                                        [<c01b7752>]
sys_fcntl64+0x42/0x90
[  133.277534]                                        [<c010351a>]
syscall_call+0x7/0xb
[  133.277544]                                        [<ffffffff>] 0xffffffff
[  133.277552]  }
[  133.277556]  ... key      at: [<c0b2c388>] __key.20023+0x0/0x8
[  133.277564]
[  133.277565] stack backtrace:
[  133.277573] Pid: 0, comm: swapper Not tainted
2.6.29-g14-rfkill-nophy-ledon-03652-g5d80f8e #87
[  133.277580] Call Trace:
[  133.277588]  [<c0502887>] ? printk+0x18/0x1a
[  133.277598]  [<c0151b6d>] print_irq_inversion_bug+0x11d/0x190
[  133.277607]  [<c0151c47>] check_usage_forwards+0x67/0xb0
[  133.277616]  [<c0150f9a>] ? save_trace+0x3a/0xa0
[  133.277624]  [<c015223d>] mark_lock+0x4fd/0xc30
[  133.277633]  [<c0153d0c>] __lock_acquire+0x6fc/0x1920
[  133.277643]  [<c0154f8e>] lock_acquire+0x5e/0x80
[  133.277651]  [<c01b7107>] ? kill_fasync+0x27/0x50
[  133.277660]  [<c050643d>] _read_lock+0x3d/0x50
[  133.277669]  [<c01b7107>] ? kill_fasync+0x27/0x50
[  133.277677]  [<c01b7107>] kill_fasync+0x27/0x50
[  133.277685]  [<c03a38ef>] evdev_pass_event+0x6f/0x80
[  133.277693]  [<c03a3c52>] evdev_event+0x72/0x110
[  133.277700]  [<c03a3be0>] ? evdev_event+0x0/0x110
[  133.277710]  [<c039f284>] input_pass_event+0x64/0xf0
[  133.277719]  [<c039f220>] ? input_pass_event+0x0/0xf0
[  133.277729]  [<c039f70d>] input_handle_event+0x7d/0x420
[  133.277736]  [<c03a0ae0>] input_event+0x60/0x70
[  133.277745]  [<c03a87a6>] synaptics_process_byte+0x476/0x860
[  133.277755]  [<c03a6a7f>] psmouse_handle_byte+0xf/0x110
[  133.277764]  [<c03a7874>] psmouse_interrupt+0xc4/0x2b0
[  133.277773]  [<c050619d>] ? _spin_lock_irqsave+0x4d/0x60
[  133.277782]  [<c039c29b>] serio_interrupt+0x3b/0x80
[  133.277791]  [<c039d2e3>] i8042_interrupt+0xb3/0x250
[  133.277799]  [<c016f6d9>] handle_IRQ_event+0x39/0xa0
[  133.277808]  [<c0170ded>] handle_edge_irq+0xad/0x140
[  133.277816]  [<c0104f9b>] do_IRQ+0x4b/0x90
[  133.277824]  [<c0103aac>] common_interrupt+0x2c/0x34
[  133.277833]  [<c01094b7>] ? default_idle+0x57/0x60
[  133.277842]  [<c010966b>] c1e_idle+0x9b/0x100
[  133.277850]  [<c0102370>] cpu_idle+0x70/0xb0
[  133.277857]  [<c04f2547>] rest_init+0x67/0x70