r203753, amd64

lock order reversal:
 1st 0xffffff80003ad018 wpi0_com_lock (wpi0_com_lock) @ 
/usr/src/sys/modules/wpi/../../dev/wpi/if_wpi.c:1292
 2nd 0xffffff00034f4010 wpi0 (network driver) @ 
/usr/src/sys/modules/wpi/../../dev/wpi/if_wpi.c:2069
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a
_witness_debugger() at _witness_debugger+0x49
witness_checkorder() at witness_checkorder+0x7ea
_mtx_lock_flags() at _mtx_lock_flags+0x68
wpi_raw_xmit() at wpi_raw_xmit+0x68
ieee80211_send_mgmt() at ieee80211_send_mgmt+0x49c
sta_newstate() at sta_newstate+0x42b
wpi_newstate() at wpi_newstate+0xe3
ieee80211_newstate_cb() at ieee80211_newstate_cb+0xac
taskqueue_run() at taskqueue_run+0x90
taskqueue_thread_loop() at taskqueue_thread_loop+0x3f
fork_exit() at fork_exit+0x12a
fork_trampoline() at fork_trampoline+0xe
--- trap 0, rip = 0, rsp = 0xffffff8000183d30, rbp = 0 ---

--Marcin

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