On Thu, 2008-07-31 at 23:04 -0400, Dmitry Torokhov wrote: > On Thu, Jul 31, 2008 at 02:57:39PM -0700, Andrew Morton wrote: > > > > (cc linux-input) > > > > On Thu, 31 Jul 2008 11:41:25 +0200 > > "Zdenek Kabelac" <zdenek.kabelac@xxxxxxxxx> wrote: > > > > > Hi > > > > > > During mouse unplugging from psaux connector from the laptops' docking > > > station I've got attached INFO trace. > > > (laptops still has synaptics device) > > > > > Dell? > > > > Also for unknown reason to me psaux mouse & synaptic device do not > > > work somehow together - is it hw limitation > > > of /dev/input/mice interface? > > > (USB mouse and synaptics do work quite well together) > > > > > > [ INFO: possible recursive locking detected ] > > > 2.6.27-rc1 #48 > > > > (it's 2.6.27-rc1) > > > > Peter, here is the trace we talked about long time ago. For some reason > lockdep annotation only works once. If reconnect is forced or psmouse > module is reloaded lockdep starts complaining about passthrough port. Bit puzzling - and I don't have any ps2 hardware around to test with (nor do I normally use modules - but that is fixable of course). Does Rabin's patch help? http://lkml.org/lkml/2008/8/7/329 > > > --------------------------------------------- > > > kseriod/166 is trying to acquire lock: > > > (&ps2dev->cmd_mutex){--..}, at: [<ffffffff8126e9ae>] ps2_command+0x5e/0x460 > > > > > > but task is already holding lock: > > > (&ps2dev->cmd_mutex){--..}, at: [<ffffffff8126e9ae>] ps2_command+0x5e/0x460 > > > > > > other info that might help us debug this: > > > 4 locks held by kseriod/166: > > > #0: (serio_mutex){--..}, at: [<ffffffff8126cc1e>] serio_thread+0x3e/0x410 > > > #1: (&serio->drv_mutex){--..}, at: [<ffffffff8126bf8b>] > > > serio_connect_driver+0x2b/0x50 > > > #2: (psmouse_mutex){--..}, at: [<ffffffffa009aa00>] > > > psmouse_connect+0x30/0x2c0 [psmouse] > > > #3: (&ps2dev->cmd_mutex){--..}, at: [<ffffffff8126e9ae>] > > > ps2_command+0x5e/0x460 > > > > > > stack backtrace: > > > Pid: 166, comm: kseriod Not tainted 2.6.27-rc1 #48 > > > > > > Call Trace: > > > [<ffffffff81068bda>] __lock_acquire+0xcea/0x13b0 > > > [<ffffffff81066401>] ? trace_hardirqs_off_caller+0x21/0xc0 > > > [<ffffffff810664ad>] ? trace_hardirqs_off+0xd/0x10 > > > [<ffffffff8126e9ae>] ? ps2_command+0x5e/0x460 > > > [<ffffffff81069336>] lock_acquire+0x96/0xe0 > > > [<ffffffff8126e9ae>] ? ps2_command+0x5e/0x460 > > > [<ffffffff81313861>] mutex_lock_nested+0xc1/0x340 > > > [<ffffffff8126e9ae>] ? ps2_command+0x5e/0x460 > > > [<ffffffff810135a0>] ? native_sched_clock+0x90/0xb0 > > > [<ffffffff8126e9ae>] ps2_command+0x5e/0x460 > > > [<ffffffff81066401>] ? trace_hardirqs_off_caller+0x21/0xc0 > > > [<ffffffff81065834>] ? get_lock_stats+0x34/0x70 > > > [<ffffffffa009977d>] psmouse_sliced_command+0x2d/0x90 [psmouse] > > > [<ffffffff8126e838>] ? ps2_sendbyte+0x48/0x130 > > > [<ffffffffa009b8f7>] synaptics_pt_write+0x27/0x60 [psmouse] > > > [<ffffffff81315acd>] ? _spin_unlock_irq+0x3d/0x80 > > > [<ffffffff8126e84d>] ps2_sendbyte+0x5d/0x130 > > > [<ffffffff81319840>] ? sub_preempt_count+0x80/0x120 > > > [<ffffffff8126ea4d>] ps2_command+0xfd/0x460 > > > [<ffffffff81319840>] ? sub_preempt_count+0x80/0x120 > > > [<ffffffff81315acd>] ? _spin_unlock_irq+0x3d/0x80 > > > [<ffffffffa0099917>] psmouse_probe+0x27/0xa0 [psmouse] > > > [<ffffffff8126c1e1>] ? serio_open+0x11/0x50 > > > [<ffffffffa009ab48>] psmouse_connect+0x178/0x2c0 [psmouse] > > > [<ffffffff8126bf96>] serio_connect_driver+0x36/0x50 > > > [<ffffffff8126bfcb>] serio_driver_probe+0x1b/0x20 > > > [<ffffffff81221112>] driver_probe_device+0xa2/0x1e0 > > > [<ffffffff812212e0>] ? __device_attach+0x0/0x10 > > > [<ffffffff812212e9>] __device_attach+0x9/0x10 > > > [<ffffffff8122050b>] bus_for_each_drv+0x6b/0xa0 > > > [<ffffffff812213b8>] device_attach+0x88/0x90 > > > [<ffffffff812202d5>] bus_attach_device+0x55/0x80 > > > [<ffffffff8121ee99>] device_add+0x4f9/0x610 > > > [<ffffffff81319840>] ? sub_preempt_count+0x80/0x120 > > > [<ffffffff8126ce1c>] serio_thread+0x23c/0x410 > > > [<ffffffff810571a0>] ? autoremove_wake_function+0x0/0x40 > > > [<ffffffff8126cbe0>] ? serio_thread+0x0/0x410 > > > [<ffffffff81056de9>] kthread+0x49/0x90 > > > [<ffffffff8100d669>] child_rip+0xa/0x11 > > > [<ffffffff8103b757>] ? finish_task_switch+0x57/0x110 > > > [<ffffffff81315acd>] ? _spin_unlock_irq+0x3d/0x80 > > > [<ffffffff8100cc73>] ? restore_args+0x0/0x30 > > > [<ffffffff810664ad>] ? trace_hardirqs_off+0xd/0x10 > > > [<ffffffff81056da0>] ? kthread+0x0/0x90 > > > [<ffffffff8100d65f>] ? child_rip+0x0/0x11 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
