Hi, I've got lockdep complaining in the latest Linus tree when doing STD. Regards Oliver Feb 3 17:02:59 vanamonde kernel: ======================================================= Feb 3 17:02:59 vanamonde kernel: [ INFO: possible circular locking dependency detected ] Feb 3 17:02:59 vanamonde kernel: 2.6.33-rc6-0.1-default #50 Feb 3 17:02:59 vanamonde kernel: ------------------------------------------------------- Feb 3 17:03:00 vanamonde kernel: bash/2406 is trying to acquire lock: Feb 3 17:03:00 vanamonde kernel: (rtnl_mutex){+.+.+.}, at: [<ffffffff812b74c6>] rtnl_lock+0x12/0x14 Feb 3 17:03:00 vanamonde kernel: Feb 3 17:03:00 vanamonde kernel: but task is already holding lock: Feb 3 17:03:00 vanamonde kernel: (pm_mutex){+.+.+.}, at: [<ffffffff81077e1c>] hibernate+0x17/0x16d Feb 3 17:03:00 vanamonde kernel: Feb 3 17:03:00 vanamonde kernel: which lock already depends on the new lock. Feb 3 17:03:00 vanamonde kernel: Feb 3 17:03:00 vanamonde kernel: Feb 3 17:03:00 vanamonde kernel: the existing dependency chain (in reverse order) is: Feb 3 17:03:01 vanamonde bluetoothd[1780]: Stopping security manager 0 Feb 3 17:03:04 vanamonde bluetoothd[1780]: HCI dev 0 down Feb 3 17:03:04 vanamonde kernel: Feb 3 17:03:04 vanamonde kernel: -> #2 (pm_mutex){+.+.+.}: Feb 3 17:03:04 vanamonde kernel: [<ffffffff8106ab91>] __lock_acquire+0x135e/0x16eb Feb 3 17:03:04 vanamonde kernel: [<ffffffff8106afea>] lock_acquire+0xcc/0xe9 Feb 3 17:03:04 vanamonde kernel: [<ffffffff81331e2a>] mutex_lock_nested+0x54/0x2b5 Feb 3 17:03:04 vanamonde kernel: [<ffffffff81077c06>] resume_store+0x61/0xa2 Feb 3 17:03:04 vanamonde kernel: [<ffffffff811d3fef>] kobj_attr_store+0x17/0x19 Feb 3 17:03:04 vanamonde kernel: [<ffffffff8114332a>] sysfs_write_file+0x103/0x13f Feb 3 17:03:04 vanamonde bluetoothd[1780]: Adapter /org/bluez/1775/hci0 has been disabled Feb 3 17:03:05 vanamonde bluetoothd[1780]: HCI dev 0 unregistered Feb 3 17:03:05 vanamonde bluetoothd[1780]: Unregister path: /org/bluez/1775/hci0 Feb 3 17:03:05 vanamonde bluetoothd[1780]: HCI dev 0 registered Feb 3 17:03:05 vanamonde kernel: [<ffffffff810ed676>] vfs_write+0xad/0x172 Feb 3 17:03:05 vanamonde kernel: [<ffffffff810ed7f4>] sys_write+0x45/0x6c Feb 3 17:03:05 vanamonde kernel: [<ffffffff810029ab>] system_call_fastpath+0x16/0x1b Feb 3 17:03:05 vanamonde kernel: Feb 3 17:03:05 vanamonde kernel: -> #1 (s_active){++++.+}: Feb 3 17:03:06 vanamonde bluetoothd[1780]: HCI dev 0 up Feb 3 17:03:06 vanamonde bluetoothd[1780]: Starting security manager 0 Feb 3 17:03:06 vanamonde kernel: [<ffffffff8106ab91>] __lock_acquire+0x135e/0x16eb Feb 3 17:03:06 vanamonde kernel: [<ffffffff8106afea>] lock_acquire+0xcc/0xe9 Feb 3 17:03:06 vanamonde kernel: [<ffffffff81143f56>] sysfs_deactivate+0x86/0xc3 Feb 3 17:03:06 vanamonde kernel: [<ffffffff81144633>] sysfs_addrm_finish+0x31/0x5a Feb 3 17:03:06 vanamonde kernel: [<ffffffff81142931>] sysfs_hash_and_remove+0x4e/0x65 Feb 3 17:03:06 vanamonde kernel: [<ffffffff81145814>] sysfs_remove_group+0x8c/0xc5 Feb 3 17:03:06 vanamonde kernel: [<ffffffff81269570>] dpm_sysfs_remove+0x14/0x16 Feb 3 17:03:06 vanamonde kernel: [<ffffffff81263d37>] device_del+0x47/0x181 Feb 3 17:03:06 vanamonde bluetoothd[1780]: Parsing /etc/bluetooth/serial.conf failed: No such file or directory Feb 3 17:03:07 vanamonde kernel: [<ffffffff812ba61c>] netdev_unregister_kobject+0x24/0x28 Feb 3 17:03:07 vanamonde kernel: [<ffffffff812ae837>] rollback_registered_many+0x29b/0x300 Feb 3 17:03:07 vanamonde kernel: [<ffffffff812ae97d>] unregister_netdevice_queue+0x7f/0xb2 Feb 3 17:03:07 vanamonde kernel: [<ffffffff812ae9cc>] unregister_netdev+0x1c/0x23 Feb 3 17:03:07 vanamonde kernel: [<ffffffffa04730c4>] usbnet_disconnect+0x87/0xba [usbnet] Feb 3 17:03:07 vanamonde kernel: [<ffffffffa00bb6ac>] usb_unbind_interface+0x69/0xf4 [usbcore] Feb 3 17:03:07 vanamonde kernel: [<ffffffff8126617e>] __device_release_driver+0x76/0xcc Feb 3 17:03:07 vanamonde bluetoothd[1780]: Adapter /org/bluez/1775/hci0 has been enabled Feb 3 17:03:07 vanamonde kernel: [<ffffffff812662a2>] device_release_driver+0x1e/0x2b Feb 3 17:03:07 vanamonde kernel: [<ffffffff81265797>] bus_remove_device+0xa8/0xbd Feb 3 17:03:07 vanamonde kernel: [<ffffffff81263e22>] device_del+0x132/0x181 Feb 3 17:03:07 vanamonde kernel: [<ffffffffa00b8446>] usb_disable_device+0x101/0x17e [usbcore] Feb 3 17:03:07 vanamonde kernel: [<ffffffffa00b2c24>] usb_disconnect+0xdb/0x150 [usbcore] Feb 3 17:03:07 vanamonde kernel: [<ffffffffa00b434e>] hub_thread+0x6e6/0x1268 [usbcore] Feb 3 17:03:07 vanamonde kernel: [<ffffffff8105837b>] kthread+0x7a/0x82 Feb 3 17:03:07 vanamonde kernel: [<ffffffff810037d4>] kernel_thread_helper+0x4/0x10 Feb 3 17:03:07 vanamonde kernel: Feb 3 17:03:08 vanamonde kernel: -> #0 (rtnl_mutex){+.+.+.}: Feb 3 17:03:08 vanamonde kernel: [<ffffffff8106a841>] __lock_acquire+0x100e/0x16eb Feb 3 17:03:08 vanamonde kernel: [<ffffffff8106afea>] lock_acquire+0xcc/0xe9 Feb 3 17:03:08 vanamonde kernel: [<ffffffff81331e2a>] mutex_lock_nested+0x54/0x2b5 Feb 3 17:03:08 vanamonde kernel: [<ffffffff812b74c6>] rtnl_lock+0x12/0x14 Feb 3 17:03:08 vanamonde kernel: [<ffffffffa020c452>] wiphy_suspend+0x35/0x58 [cfg80211] Feb 3 17:03:08 vanamonde kernel: [<ffffffff81269c34>] legacy_suspend+0x29/0x63 Feb 3 17:03:08 vanamonde kernel: [<ffffffff81269faa>] dpm_suspend_start+0x2e5/0x444 Feb 3 17:03:08 vanamonde kernel: [<ffffffff81077c8b>] hibernation_snapshot+0x44/0x1be Feb 3 17:03:08 vanamonde kernel: [<ffffffff81077ece>] hibernate+0xc9/0x16d Feb 3 17:03:09 vanamonde kernel: [<ffffffff81076d33>] state_store+0x57/0xce Feb 3 17:03:09 vanamonde kernel: [<ffffffff811d3fef>] kobj_attr_store+0x17/0x19 Feb 3 17:03:09 vanamonde kernel: [<ffffffff8114332a>] sysfs_write_file+0x103/0x13f Feb 3 17:03:09 vanamonde kernel: [<ffffffff810ed676>] vfs_write+0xad/0x172 Feb 3 17:03:09 vanamonde kernel: [<ffffffff810ed7f4>] sys_write+0x45/0x6c Feb 3 17:03:09 vanamonde kernel: [<ffffffff810029ab>] system_call_fastpath+0x16/0x1b Feb 3 17:03:09 vanamonde kernel: Feb 3 17:03:09 vanamonde kernel: other info that might help us debug this: Feb 3 17:03:09 vanamonde kernel: Feb 3 17:03:09 vanamonde kernel: 4 locks held by bash/2406: Feb 3 17:03:09 vanamonde kernel: #0: (&buffer->mutex){+.+.+.}, at: [<ffffffff8114325e>] sysfs_write_file+0x37/0x13f Feb 3 17:03:09 vanamonde kernel: #1: (s_active){++++.+}, at: [<ffffffff8114489f>] sysfs_get_active_two+0x1f/0x44 Feb 3 17:03:09 vanamonde kernel: #2: (s_active){++++.+}, at: [<ffffffff811448ac>] sysfs_get_active_two+0x2c/0x44 Feb 3 17:03:09 vanamonde kernel: #3: (pm_mutex){+.+.+.}, at: [<ffffffff81077e1c>] hibernate+0x17/0x16d Feb 3 17:03:09 vanamonde kernel: Feb 3 17:03:09 vanamonde kernel: stack backtrace: Feb 3 17:03:09 vanamonde kernel: Pid: 2406, comm: bash Not tainted 2.6.33-rc6-0.1-default #50 Feb 3 17:03:09 vanamonde kernel: Call Trace: Feb 3 17:03:09 vanamonde kernel: [<ffffffff813336ef>] ? _raw_spin_unlock_irqrestore+0x33/0x41 Feb 3 17:03:09 vanamonde kernel: [<ffffffff810692f5>] print_circular_bug+0xaf/0xbe Feb 3 17:03:10 vanamonde kernel: [<ffffffff8106a841>] __lock_acquire+0x100e/0x16eb Feb 3 17:03:10 vanamonde kernel: [<ffffffff8106afea>] lock_acquire+0xcc/0xe9 Feb 3 17:03:10 vanamonde kernel: [<ffffffff812b74c6>] ? rtnl_lock+0x12/0x14 Feb 3 17:03:10 vanamonde kernel: [<ffffffffa020c41d>] ? wiphy_suspend+0x0/0x58 [cfg80211] Feb 3 17:03:10 vanamonde kernel: [<ffffffff81331e2a>] mutex_lock_nested+0x54/0x2b5 Feb 3 17:03:10 vanamonde kernel: [<ffffffff812b74c6>] ? rtnl_lock+0x12/0x14 Feb 3 17:03:10 vanamonde kernel: [<ffffffffa020c41d>] ? wiphy_suspend+0x0/0x58 [cfg80211] Feb 3 17:03:10 vanamonde kernel: [<ffffffff812b74c6>] rtnl_lock+0x12/0x14 Feb 3 17:03:10 vanamonde kernel: [<ffffffffa020c452>] wiphy_suspend+0x35/0x58 [cfg80211] Feb 3 17:03:10 vanamonde kernel: [<ffffffff81269c34>] legacy_suspend+0x29/0x63 Feb 3 17:03:11 vanamonde kernel: [<ffffffff81269faa>] dpm_suspend_start+0x2e5/0x444 Feb 3 17:03:11 vanamonde kernel: [<ffffffff81077c8b>] hibernation_snapshot+0x44/0x1be Feb 3 17:03:11 vanamonde kernel: [<ffffffff81077ece>] hibernate+0xc9/0x16d Feb 3 17:03:11 vanamonde kernel: [<ffffffff81076d33>] state_store+0x57/0xce Feb 3 17:03:11 vanamonde kernel: [<ffffffff811d3fef>] kobj_attr_store+0x17/0x19 Feb 3 17:03:11 vanamonde kernel: [<ffffffff8114332a>] sysfs_write_file+0x103/0x13f Feb 3 17:03:11 vanamonde kernel: [<ffffffff810ed676>] vfs_write+0xad/0x172 Feb 3 17:03:11 vanamonde kernel: [<ffffffff81068c13>] ? trace_hardirqs_on_caller+0x10c/0x130 Feb 3 17:03:11 vanamonde kernel: [<ffffffff810ed7f4>] sys_write+0x45/0x6c Feb 3 17:03:11 vanamonde kernel: [<ffffffff810029ab>] system_call_fastpath+0x16/0x1b Feb 3 17:03:11 vanamonde kernel: btusb_intr_complete: hci0 urb ffff8801357f1080 failed to resubmit (1) Feb 3 17:03:11 vanamonde kernel: uhci_hcd 0000:00:1a.2: release dev 2 ep81-INT, period 1, phase 0, 23 us Feb 3 17:03:11 vanamonde kernel: btusb_bulk_complete: hci0 urb ffff88013967be40 failed to resubmit (1) Feb 3 17:03:11 vanamonde kernel: btusb_bulk_complete: hci0 urb ffff88013967bf00 failed to resubmit (1) -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html