On Sat, Oct 3, 2009 at 5:43 PM, Oliver Hartkopp <oliver@xxxxxxxxxxxx> wrote: > Dave Young wrote: >> On Fri, Oct 02, 2009 at 06:04:14PM +0200, Oliver Hartkopp wrote: >>> Dave Young wrote: >>>> On Fri, Oct 2, 2009 at 2:28 PM, Oliver Hartkopp <oliver@xxxxxxxxxxxx> wrote: >>>>> Hello Marcel, >>>>> >>>>> with current net-2.6 tree ... >>>>> >>>>> While starting my PPP Bluetooth dialup networking, i got this: >>>> Hi, oliver >>>> >>>> please try following patch: >>>> http://patchwork.kernel.org/patch/51326/ >>> Hi Dave, >>> >>> that fixed it at ppp startup! >>> >>> Tested-by: Oliver Hartkopp <oliver@xxxxxxxxxxxx> >>> >>> Btw. when shutting down the ppp connection i still get this: >>> >>> [ 361.996887] INFO: trying to register non-static key. >>> [ 361.996897] the code is fine but needs lockdep annotation. >>> [ 361.996902] turning off the locking correctness validator. >>> [ 361.996912] Pid: 0, comm: swapper Not tainted 2.6.31-08939-gdb8abec-dirty #22 >>> [ 361.996919] Call Trace: >>> [ 361.996933] [<c12e4fb2>] ? printk+0xf/0x11 >>> [ 361.996947] [<c1042214>] register_lock_class+0x5a/0x295 >>> [ 361.996957] [<c1043af2>] __lock_acquire+0x9b/0xc03 >>> [ 361.996967] [<c104464b>] ? __lock_acquire+0xbf4/0xc03 >>> [ 361.996985] [<fa59a168>] ? l2cap_get_chan_by_scid+0x35/0x43 [l2cap] >>> [ 361.996995] [<c104491f>] ? lock_release_non_nested+0x17b/0x1db >>> [ 361.997008] [<fa59a168>] ? l2cap_get_chan_by_scid+0x35/0x43 [l2cap] >>> [ 361.997018] [<c10426fd>] ? trace_hardirqs_off+0xb/0xd >>> [ 361.997028] [<c10446b6>] lock_acquire+0x5c/0x73 >>> [ 361.997039] [<c124cd14>] ? skb_dequeue+0x12/0x4c >>> [ 361.997049] [<c12e6e23>] _spin_lock_irqsave+0x24/0x34 >>> [ 361.997058] [<c124cd14>] ? skb_dequeue+0x12/0x4c >>> [ 361.997066] [<c124cd14>] skb_dequeue+0x12/0x4c >>> [ 361.997075] [<c124d579>] skb_queue_purge+0x14/0x1b >>> [ 361.997088] [<fa59ce3f>] l2cap_recv_frame+0xe9e/0x129a [l2cap] >>> [ 361.997099] [<c10421d1>] ? register_lock_class+0x17/0x295 >>> [ 361.997110] [<c104464b>] ? __lock_acquire+0xbf4/0xc03 >>> [ 361.997128] [<c104464b>] ? __lock_acquire+0xbf4/0xc03 >>> [ 361.997139] [<c120de74>] ? uhci_giveback_urb+0xf2/0x162 >>> [ 361.997163] [<f8bb4c45>] ? hci_rx_task+0xfe/0x1f8 [bluetooth] >>> [ 361.997177] [<fa59d2e4>] l2cap_recv_acldata+0xa9/0x1be [l2cap] >>> [ 361.997190] [<fa59d23b>] ? l2cap_recv_acldata+0x0/0x1be [l2cap] >>> [ 361.997208] [<f8bb4c77>] hci_rx_task+0x130/0x1f8 [bluetooth] >>> [ 361.997219] [<c102a098>] tasklet_action+0x6b/0xb2 >>> [ 361.997228] [<c102a46b>] __do_softirq+0x82/0x101 >>> [ 361.997237] [<c102a515>] do_softirq+0x2b/0x43 >>> [ 361.997246] [<c102a619>] irq_exit+0x35/0x68 >>> [ 361.997256] [<c1004513>] do_IRQ+0x80/0x96 >>> [ 361.997265] [<c10030ae>] common_interrupt+0x2e/0x34 >>> [ 361.997275] [<c104007b>] ? tick_device_uses_broadcast+0x71/0x7c >>> [ 361.997286] [<c11747a8>] ? acpi_idle_enter_simple+0x103/0x12e >>> [ 361.997296] [<c1174515>] acpi_idle_enter_bm+0xc3/0x253 >>> [ 361.997306] [<c1238b6f>] cpuidle_idle_call+0x60/0x91 >>> [ 361.997315] [<c1001d44>] cpu_idle+0x49/0x65 >>> [ 361.997324] [<c12e2f0e>] start_secondary+0x190/0x195 >>> >>> >>> Thanks, >>> Oliver >>> >> >> Oliver, does following patch fix the non-static lock problem? >> -- >> >> now l2cap conn locks will be initialized after setup l2cap conn timer, >> it will introduce following problem: >> >> [ 361.996887] INFO: trying to register non-static key. >> [ 361.996897] the code is fine but needs lockdep annotation. >> [ 361.996902] turning off the locking correctness validator. >> [ 361.996912] Pid: 0, comm: swapper Not tainted 2.6.31-08939-gdb8abec-dirty #22 >> [ 361.996919] Call Trace: >> [ 361.996933] [<c12e4fb2>] ? printk+0xf/0x11 >> [ 361.996947] [<c1042214>] register_lock_class+0x5a/0x295 >> [ 361.996957] [<c1043af2>] __lock_acquire+0x9b/0xc03 >> [ 361.996967] [<c104464b>] ? __lock_acquire+0xbf4/0xc03 >> [ 361.996985] [<fa59a168>] ? l2cap_get_chan_by_scid+0x35/0x43 [l2cap] >> [ 361.996995] [<c104491f>] ? lock_release_non_nested+0x17b/0x1db >> [ 361.997008] [<fa59a168>] ? l2cap_get_chan_by_scid+0x35/0x43 [l2cap] >> [ 361.997018] [<c10426fd>] ? trace_hardirqs_off+0xb/0xd >> [ 361.997028] [<c10446b6>] lock_acquire+0x5c/0x73 >> [ 361.997039] [<c124cd14>] ? skb_dequeue+0x12/0x4c >> [ 361.997049] [<c12e6e23>] _spin_lock_irqsave+0x24/0x34 >> [ 361.997058] [<c124cd14>] ? skb_dequeue+0x12/0x4c >> [ 361.997066] [<c124cd14>] skb_dequeue+0x12/0x4c >> [ 361.997075] [<c124d579>] skb_queue_purge+0x14/0x1b >> [ 361.997088] [<fa59ce3f>] l2cap_recv_frame+0xe9e/0x129a [l2cap] >> [ 361.997099] [<c10421d1>] ? register_lock_class+0x17/0x295 >> [ 361.997110] [<c104464b>] ? __lock_acquire+0xbf4/0xc03 >> [ 361.997128] [<c104464b>] ? __lock_acquire+0xbf4/0xc03 >> [ 361.997139] [<c120de74>] ? uhci_giveback_urb+0xf2/0x162 >> [ 361.997163] [<f8bb4c45>] ? hci_rx_task+0xfe/0x1f8 [bluetooth] >> [ 361.997177] [<fa59d2e4>] l2cap_recv_acldata+0xa9/0x1be [l2cap] >> [ 361.997190] [<fa59d23b>] ? l2cap_recv_acldata+0x0/0x1be [l2cap] >> [ 361.997208] [<f8bb4c77>] hci_rx_task+0x130/0x1f8 [bluetooth] >> [ 361.997219] [<c102a098>] tasklet_action+0x6b/0xb2 >> [ 361.997228] [<c102a46b>] __do_softirq+0x82/0x101 >> [ 361.997237] [<c102a515>] do_softirq+0x2b/0x43 >> [ 361.997246] [<c102a619>] irq_exit+0x35/0x68 >> [ 361.997256] [<c1004513>] do_IRQ+0x80/0x96 >> [ 361.997265] [<c10030ae>] common_interrupt+0x2e/0x34 >> [ 361.997275] [<c104007b>] ? tick_device_uses_broadcast+0x71/0x7c >> [ 361.997286] [<c11747a8>] ? acpi_idle_enter_simple+0x103/0x12e >> [ 361.997296] [<c1174515>] acpi_idle_enter_bm+0xc3/0x253 >> [ 361.997306] [<c1238b6f>] cpuidle_idle_call+0x60/0x91 >> [ 361.997315] [<c1001d44>] cpu_idle+0x49/0x65 >> [ 361.997324] [<c12e2f0e>] start_secondary+0x190/0x195 >> >> Here move lock init things before setup_timer to avoid misuse >> uninitialized locks. >> >> Reported-by: Oliver Hartkopp <oliver@xxxxxxxxxxxx> >> Signed-off-by: Dave Young <hidave.darkstar@xxxxxxxxx> >> --- >> net/bluetooth/l2cap.c | 6 +++--- >> 1 file changed, 3 insertions(+), 3 deletions(-) >> >> --- linux-2.6.31.orig/net/bluetooth/l2cap.c 2009-09-30 16:36:10.000000000 +0800 >> +++ linux-2.6.31/net/bluetooth/l2cap.c 2009-10-03 14:44:51.000000000 +0800 >> @@ -555,12 +555,12 @@ static struct l2cap_conn *l2cap_conn_add >> >> conn->feat_mask = 0; >> >> - setup_timer(&conn->info_timer, l2cap_info_timeout, >> - (unsigned long) conn); >> - >> spin_lock_init(&conn->lock); >> rwlock_init(&conn->chan_list.lock); >> >> + setup_timer(&conn->info_timer, l2cap_info_timeout, >> + (unsigned long) conn); >> + >> conn->disc_reason = 0x13; >> >> return conn; > > No, it does not have any effect. > I can reproduce the bug. It's probably caused by the l2cap changes by Gustavo F. Padovan <gustavo@xxxxxxxxxxxxxxxxx>, I didn't see such problem after reverting Gustavo's patch series. Add gustavo to cc-list. BTW, my above patch fix similar things. I need rewrite the patch description. > As the lockdep annotation only appears when shutting down the ppp connection, > i wonder whether it should help to change things in a _conn_add() function. > :-) > > Or didn't i made it clear before, that this annotation one only happens at ppp > shutdown? > > Best regards, > Oliver > > -- Regards dave -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
