Hello Guys,
I am not sure if this mailing list is the right to post the bug.
I just ran "hciconfig hci1 leadv" then when I connect my iPhone apps,
it dumps the error messages below:
john
[ 260.111724] ======================================================
[ 260.118194] [ INFO: possible circular locking dependency detected ]
[ 260.124755] 3.5.2 #4 Not tainted
[ 260.128143] -------------------------------------------------------
[ 260.134704] kworker/u:0/5 is trying to acquire lock:
[ 260.139892] ([ 260.141662]
sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+...}, at: [<bf03b7ec>]
l2cap_chan_ready+0x1c/0xbc [bluetooth]
[ 260.152435] but task is already holding lock:
[ 260.157196] (&chan->lock){+.+...}, at: [<bf043474>]
l2cap_connect_cfm+0xf4/0x388 [bluetooth]
[ 260.166198]
[ 260.166198] which lock already depends on the new lock.
[ 260.166198]
[ 260.174774]
[ 260.174774] the existing dependency chain (in reverse order) is:
[ 260.182617]
-> #2 (&chan->lock){+.+...}:
[ 260.186950] [<c0090dc4>] lock_acquire+0x98/0x100
[ 260.192413] [<c0568290>] mutex_lock_nested+0x3c/0x2f4
[ 260.198364] [<bf043474>] l2cap_connect_cfm+0xf4/0x388 [bluetooth]
[ 260.205444] [<bf030388>] hci_event_packet+0x5304/0x6d9c [bluetooth]
[ 260.212707] [<bf026498>] hci_rx_work+0x288/0x358 [bluetooth]
[ 260.219299] [<c005ab38>] process_one_work+0x19c/0x4f4
[ 260.225250] [<c005d6f8>] worker_thread+0x170/0x378
[ 260.230926] [<c00623e4>] kthread+0x90/0x9c
[ 260.235870] [<c0014eb4>] kernel_thread_exit+0x0/0x8
[ 260.241638]
-> #1 (&conn->chan_lock){+.+...}:
[ 260.246429] [<c0090dc4>] lock_acquire+0x98/0x100
[ 260.251922] [<c0568290>] mutex_lock_nested+0x3c/0x2f4
[ 260.257843] [<bf04365c>] l2cap_connect_cfm+0x2dc/0x388 [bluetooth]
[ 260.265045] [<bf030388>] hci_event_packet+0x5304/0x6d9c [bluetooth]
[ 260.272308] [<bf026498>] hci_rx_work+0x288/0x358 [bluetooth]
[ 260.278900] [<c005ab38>] process_one_work+0x19c/0x4f4
[ 260.284851] [<c005d6f8>] worker_thread+0x170/0x378
[ 260.290527] [<c00623e4>] kthread+0x90/0x9c
[ 260.295471] [<c0014eb4>] kernel_thread_exit+0x0/0x8
[ 260.301239]
-> #0 (sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP){+.+...}:
[ 260.307647] [<c00906ec>] __lock_acquire+0x1cf8/0x1d88
[ 260.313598] [<c0090dc4>] lock_acquire+0x98/0x100
[ 260.319061] [<c043a454>] lock_sock_nested+0x6c/0x78
[ 260.324829] [<bf03b7ec>] l2cap_chan_ready+0x1c/0xbc [bluetooth]
[ 260.331756] [<bf043580>] l2cap_connect_cfm+0x200/0x388 [bluetooth]
[ 260.338928] [<bf030388>] hci_event_packet+0x5304/0x6d9c [bluetooth]
[ 260.346160] [<bf026498>] hci_rx_work+0x288/0x358 [bluetooth]
[ 260.352783] [<c005ab38>] process_one_work+0x19c/0x4f4
[ 260.358734] [<c005d6f8>] worker_thread+0x170/0x378
[ 260.364410] [<c00623e4>] kthread+0x90/0x9c
[ 260.369323] [<c0014eb4>] kernel_thread_exit+0x0/0x8
[ 260.375091]
[ 260.375091] other info that might help us debug this:
[ 260.375091]
[ 260.383483] Chain exists of:
sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP --> &conn->chan_lock --> &chan->lock
[ 260.393585] Possible unsafe locking scenario:
[ 260.393585]
[ 260.399780] CPU0 CPU1
[ 260.404510] ---- ----
[ 260.409271] lock(&chan->lock);
[ 260.412658] lock(&conn->chan_lock);
[ 260.419158] lock(&chan->lock);
[ 260.425201] lock(sk_lock-AF_BLUETOOTH-BTPROTO_L2CAP);
[ 260.430664]
[ 260.430664] *** DEADLOCK ***
[ 260.430664]
[ 260.436889] 5 locks held by kworker/u:0/5:
[ 260.441192] #0: (hdev->name){.+.+.+}, at: [<c005aab8>]
process_one_work+0x11c/0x4f4
[ 260.449432] #1: ((&hdev->rx_work)){+.+.+.}, at: [<c005aab8>]
process_one_work+0x11c/0x4f4
[ 260.458221] #2: (&hdev->lock){+.+.+.}, at: [<bf02cf6c>]
hci_event_packet+0x1ee8/0x6d9c [bluetooth]
[ 260.467895] #3: (&conn->chan_lock){+.+...}, at: [<bf0433e4>]
l2cap_connect_cfm+0x64/0x388 [bluetooth]
[ 260.477844] #4: (&chan->lock){+.+...}, at: [<bf043474>]
l2cap_connect_cfm+0xf4/0x388 [bluetooth]
[ 260.487304]
[ 260.487304] stack backtrace:
[ 260.491912] [<c001b624>] (unwind_backtrace+0x0/0xf0) from
[<c008cf28>] (print_circular_bug+0x1c8/0x2d4)
[ 260.501770] [<c008cf28>] (print_circular_bug+0x1c8/0x2d4) from
[<c00906ec>] (__lock_acquire+0x1cf8/0x1d88)
[ 260.511901] [<c00906ec>] (__lock_acquire+0x1cf8/0x1d88) from
[<c0090dc4>] (lock_acquire+0x98/0x100)
[ 260.521392] [<c0090dc4>] (lock_acquire+0x98/0x100) from
[<c043a454>] (lock_sock_nested+0x6c/0x78)
[ 260.530761] [<c043a454>] (lock_sock_nested+0x6c/0x78) from
[<bf03b7ec>] (l2cap_chan_ready+0x1c/0xbc [bluetooth])
[ 260.541534] [<bf03b7ec>] (l2cap_chan_ready+0x1c/0xbc [bluetooth])
from [<bf043580>] (l2cap_connect_cfm+0x200/0x388 [bluetooth])
[ 260.553649] [<bf043580>] (l2cap_connect_cfm+0x200/0x388
[bluetooth]) from [<bf030388>] (hci_event_packet+0x5304/0x6d9c
[bluetooth])
[ 260.566131] [<bf030388>] (hci_event_packet+0x5304/0x6d9c
[bluetooth]) from [<bf026498>] (hci_rx_work+0x288/0x358 [bluetooth])
[ 260.578033] [<bf026498>] (hci_rx_work+0x288/0x358 [bluetooth]) from
[<c005ab38>] (process_one_work+0x19c/0x4f4)
[ 260.588623] [<c005ab38>] (process_one_work+0x19c/0x4f4) from
[<c005d6f8>] (worker_thread+0x170/0x378)
[ 260.598297] [<c005d6f8>] (worker_thread+0x170/0x378) from
[<c00623e4>] (kthread+0x90/0x9c)
[ 260.606964] [<c00623e4>] (kthread+0x90/0x9c) from [<c0014eb4>]
(kernel_thread_exit+0x0/0x8)
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