linux/net/bluetooth
Octavian Purdila b5a30dda65 Bluetooth: silence lockdep warning
Since bluetooth uses multiple protocols types, to avoid lockdep
warnings, we need to use different lockdep classes (one for each
protocol type).

This is already done in bt_sock_create but it misses a couple of cases
when new connections are created. This patch corrects that to fix the
following warning:

<4>[ 1864.732366] =======================================================
<4>[ 1864.733030] [ INFO: possible circular locking dependency detected ]
<4>[ 1864.733544] 3.0.16-mid3-00007-gc9a0f62 #3
<4>[ 1864.733883] -------------------------------------------------------
<4>[ 1864.734408] t.android.btclc/4204 is trying to acquire lock:
<4>[ 1864.734869]  (rfcomm_mutex){+.+.+.}, at: [<c14970ea>] rfcomm_dlc_close+0x15/0x30
<4>[ 1864.735541]
<4>[ 1864.735549] but task is already holding lock:
<4>[ 1864.736045]  (sk_lock-AF_BLUETOOTH){+.+.+.}, at: [<c1498bf7>] lock_sock+0xa/0xc
<4>[ 1864.736732]
<4>[ 1864.736740] which lock already depends on the new lock.
<4>[ 1864.736750]
<4>[ 1864.737428]
<4>[ 1864.737437] the existing dependency chain (in reverse order) is:
<4>[ 1864.738016]
<4>[ 1864.738023] -> #1 (sk_lock-AF_BLUETOOTH){+.+.+.}:
<4>[ 1864.738549]        [<c1062273>] lock_acquire+0x104/0x140
<4>[ 1864.738977]        [<c13d35c1>] lock_sock_nested+0x58/0x68
<4>[ 1864.739411]        [<c1493c33>] l2cap_sock_sendmsg+0x3e/0x76
<4>[ 1864.739858]        [<c13d06c3>] __sock_sendmsg+0x50/0x59
<4>[ 1864.740279]        [<c13d0ea2>] sock_sendmsg+0x94/0xa8
<4>[ 1864.740687]        [<c13d0ede>] kernel_sendmsg+0x28/0x37
<4>[ 1864.741106]        [<c14969ca>] rfcomm_send_frame+0x30/0x38
<4>[ 1864.741542]        [<c1496a2a>] rfcomm_send_ua+0x58/0x5a
<4>[ 1864.741959]        [<c1498447>] rfcomm_run+0x441/0xb52
<4>[ 1864.742365]        [<c104f095>] kthread+0x63/0x68
<4>[ 1864.742742]        [<c14d5182>] kernel_thread_helper+0x6/0xd
<4>[ 1864.743187]
<4>[ 1864.743193] -> #0 (rfcomm_mutex){+.+.+.}:
<4>[ 1864.743667]        [<c1061ada>] __lock_acquire+0x988/0xc00
<4>[ 1864.744100]        [<c1062273>] lock_acquire+0x104/0x140
<4>[ 1864.744519]        [<c14d2c70>] __mutex_lock_common+0x3b/0x33f
<4>[ 1864.744975]        [<c14d303e>] mutex_lock_nested+0x2d/0x36
<4>[ 1864.745412]        [<c14970ea>] rfcomm_dlc_close+0x15/0x30
<4>[ 1864.745842]        [<c14990d9>] __rfcomm_sock_close+0x5f/0x6b
<4>[ 1864.746288]        [<c1499114>] rfcomm_sock_shutdown+0x2f/0x62
<4>[ 1864.746737]        [<c13d275d>] sys_socketcall+0x1db/0x422
<4>[ 1864.747165]        [<c14d42f0>] syscall_call+0x7/0xb

Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2012-02-15 13:09:26 +02:00
..
bnep Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem 2012-01-03 15:16:34 -05:00
cmtp Bluetooth: Always compile SCO and L2CAP in Bluetooth Core 2011-12-21 02:21:08 -02:00
hidp Bluetooth: Always compile SCO and L2CAP in Bluetooth Core 2011-12-21 02:21:08 -02:00
rfcomm Bluetooth: silence lockdep warning 2012-02-15 13:09:26 +02:00
af_bluetooth.c Bluetooth: silence lockdep warning 2012-02-15 13:09:26 +02:00
hci_conn.c Bluetooth: Fix l2cap conn failures for ssp devices 2012-02-15 13:09:25 +02:00
hci_core.c bluetooth: hci: Fix type of "enable_hs" to bool. 2012-01-22 15:08:46 -05:00
hci_event.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth-next 2012-01-10 15:44:17 -05:00
hci_sock.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth-next 2012-01-10 15:44:17 -05:00
hci_sysfs.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth-next 2011-12-19 14:28:22 -05:00
Kconfig Bluetooth: Always compile SCO and L2CAP in Bluetooth Core 2011-12-21 02:21:08 -02:00
l2cap_core.c Bluetooth: l2cap_set_timer needs jiffies as timeout value 2012-02-15 13:09:25 +02:00
l2cap_sock.c Bluetooth: silence lockdep warning 2012-02-15 13:09:26 +02:00
lib.c Bluetooth: Add bt_printk 2011-06-30 19:17:12 -03:00
Makefile Bluetooth: Always compile SCO and L2CAP in Bluetooth Core 2011-12-21 02:21:08 -02:00
mgmt.c Bluetooth: Fix mgmt_stop_discovery_failed() 2012-01-03 01:35:23 -02:00
sco.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/padovan/bluetooth-next 2012-01-10 15:44:17 -05:00
smp.c Bluetooth: Incorrect address while storing LTK. 2011-12-23 16:55:06 -02:00