iwi(4)-related LOR

[Shteryana Shopova]

Hi,

I am getting the following LOR on my notebook -

iwi0: <Intel(R) PRO/Wireless 2200BG> mem 0xc8400000-0xc8400fff irq 21
at device 4.0 on pci2
iwi0: Ethernet address: 00:15:00:28:5c:dc
iwi0: [ITHREAD]
iwi0: link state changed to UP
iwi0: link state changed to DOWN
iwi0: link state changed to UP
lock order reversal:
 1st 0xc427000c ieee80211com (802.11 com lock) @
/usr/src/sys/net80211/ieee80211_scan.c:523
 2nd 0xc4271400 iwi0 (network driver) @
/usr/src/sys/modules/iwi/../../dev/iwi/if_iwi.c:1907
KDB: stack backtrace:
db_trace_self_wrapper(c08f94ff,e25d8a90,c066448e,c08fb8a2,c4271400,...)
at db_trace_self_wrapper+0x26
kdb_backtrace(c08fb8a2,c4271400,c3d02950,c426e91b,c426e044,...) at
kdb_backtrace+0x29
witness_checkorder(c4271400,9,c426e044,773,c0997fb4,...) at
witness_checkorder+0x6de
_mtx_lock_flags(c4271400,0,c426e044,773,e25d8b08,...) at _mtx_lock_flags+0xbc
iwi_start(c3d16800,c42711b4,e25d8bc8,c06ef074,c3d16800,...) at iwi_start+0xae
if_start(c3d16800,0,c09064a9,17e,e25d8bac,...) at if_start+0x59
ieee80211_send_nulldata(c43e0000,38,c08faf85,6ce,c427000c) at
ieee80211_send_nulldata+0x1f4
ieee80211_sta_pwrsave(c4270004,1,20b,e25d8c44,c3ff6000,...) at
ieee80211_sta_pwrsave+0x201
scan_restart(c3ff6000,c4270004,c0906fd5,20b,c4270004,...) at scan_restart+0x96
ieee80211_bg_scan(c4270004,e25d8c84,c06ebf27,c4270004,e25d8c68,...) at
ieee80211_bg_scan+0x10f
ieee80211_scan_timeout(c4270004,e25d8c68,80246,c0993c64,e25d8c84,...)
at ieee80211_scan_timeout+0x1c
ieee80211_node_timeout(c4270004,0,c08f7dfb,ef,0,...) at
ieee80211_node_timeout+0x17
softclock(0,0,c08f37b3,471,c3af31e4,...) at softclock+0x299
ithread_loop(c3a7ac50,e25d8d38,c08f3533,315,c3ab3558,...) at ithread_loop+0x1b5
fork_exit(c0611de0,c3a7ac50,e25d8d38) at fork_exit+0xb8
fork_trampoline() at fork_trampoline+0x8
--- trap 0, eip = 0, esp = 0xe25d8d70, ebp = 0 ---

That's on a fresh CURRENT (a couple of days old) and the latest
version of if_iwi.c - $FreeBSD: src/sys/dev/iwi/if_iwi.c,v 1.56
2007/08/29 21:52:03$. Any suggestions are welcome.

cheers,
Shteryana