LOR with iwi (was Re: Panic with iwi)

Hi Andrew,

FYI, I just got following LOR with iwi, at the hotel:


lock order reversal:
 1st 0xc368e00c ieee80211com (802.11 com lock) _at_ net80211/ieee80211_scan.c:523
 2nd 0xc368f400 iwi0 (network driver) _at_ /home/haro/tmp/sys-7/modules/iwi/../../dev/iwi/if_iwi.c:1907
KDB: stack backtrace:
db_trace_self_wrapper(c07d80aa,db312a4c,c05c1cce,c07da553,c368f400,...) at db_trace_self_wrapper+0x26
kdb_backtrace(c07da553,c368f400,c36771a0,c0997ade,c09974ca,...) at kdb_backtrace+0x29
witness_checkorder(c368f400,9,c09974ca,773,c057d71d,...) at witness_checkorder+0x6de
_mtx_lock_flags(c368f400,0,c09974ca,773,c3572aa0,...) at _mtx_lock_flags+0xbc
iwi_start(c3673400,c368f1b4,db312b88,c0648444,c3673400,...) at iwi_start+0xae
if_start(c3673400,0,c07e50be,17e,db312b6c,...) at if_start+0x59
ieee80211_send_nulldata(c3a5f000,38,c07d9c38,6ce,c368e00c) at ieee80211_send_nulldata+0x1f4
ieee80211_sta_pwrsave(c368e004,1,20b,c3967e00,c3655800,...) at ieee80211_sta_pwrsave+0x212
scan_restart(c3655800,c368e004,c07e5bf7,20b,0,...) at scan_restart+0x96
ieee80211_bg_scan(c368e004,0,c07e5f2b,434,0,...) at ieee80211_bg_scan+0x10f
sta_age(c3655800,db312c84,c06452f7,c368e004,db312c68,...) at sta_age+0x345
ieee80211_scan_timeout(c368e004,db312c68,80246,c08641e4,db312c84,...) at ieee80211_scan_timeout+0x1c
ieee80211_node_timeout(c368e004,0,c07d65f4,ef,0,...) at ieee80211_node_timeout+0x17
softclock(0,0,c07d202a,471,c356e064,...) at softclock+0x299
ithread_loop(c35704e0,db312d38,c07d1da8,315,c3571558,...) at ithread_loop+0x1b5
fork_exit(c056ddd0,c35704e0,db312d38) at fork_exit+0xb8
fork_trampoline() at fork_trampoline+0x8
--- trap 0, eip = 0, esp = 0xdb312d70, ebp = 0 ---

Thanks,
 Haro
=-----------------------------------------------------------------------
           _ _    Munehiro (haro) Matsuda
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