TITLE: INFO: task hung in rtnl_lock
ALT: hang in rtnl_lock
TYPE: HANG

[  981.809015] INFO: task kworker/0:1:764 blocked for more than 120 seconds.
[  981.815945]       Not tainted 4.9.39-g72a0c9f #6
[  981.820716] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  981.828649] kworker/0:1     D27296   764      2 0x00000000
[  981.834477] Workqueue: events destroy_radio
[  981.838868]  ffff8801d7128000 0000000000000000 ffff88015c60b180 ffff8801d9e1af00
[  981.846841]  ffff8801db221498 ffff8801d71379e8 ffffffff83954b2b 0000000000000002
[  981.854812]  0000000000000007 00ff8801d7128000 ffff8801db221db0 ffff8801db221dd8
[  981.862773] Call Trace:
[  981.871021]  [<ffffffff839560e2>] schedule+0x92/0x1b0
[  981.876175]  [<ffffffff83956a53>] schedule_preempt_disabled+0x13/0x20
[  981.882795]  [<ffffffff8395bdaf>] mutex_lock_nested+0x2ff/0x830
[  981.914791]  [<ffffffff82f99187>] rtnl_lock+0x17/0x20
[  981.919959]  [<ffffffff8378b7e4>] ieee80211_unregister_hw+0x44/0x270
[  982.003971]  [<ffffffff83965c1a>] ret_from_fork+0x2a/0x40
