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Date:      Sat, 8 Oct 2011 08:17:30 +0800
From:      Adrian Chadd <adrian@freebsd.org>
To:        Edgar Martinez <emartinez@kbcnetworks.com>
Cc:        "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org>
Subject:   Re: LOR - COM LOCK
Message-ID:  <CAJ-Vmom__nKrkvZKAhhfBTkGQG%2BtvXuMgHDLS-TKvkbT=gk_bg@mail.gmail.com>
In-Reply-To: <957EB052144AA64AB39F7AB268783201022FA3E272@VA3DIAXVS881.RED001.local>
References:  <CAJ-Vmok29WLMh3SGXvB31mwsnTitYkZhTsTccizDn2u96mNoXQ@mail.gmail.com> <957EB052144AA64AB39F7AB268783201022FA3E272@VA3DIAXVS881.RED001.local>

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This is the 900mhz NICs, right?

On 8 October 2011 05:02, Edgar Martinez <emartinez@kbcnetworks.com> wrote:
> Jan =A01 00:00:36 wlanmon: (RTM_IEEE80211_ASSOC) [wlan3] [00:80:81:8d:9d:=
83]
> ath1: stuck beacon; resetting (bmiss count 4)

.. I wonder why that is happening on those NICs. This is in normal
hostap+sta WDS setup, right? Rather than adhoc or mesh?
(That changes how the MAC handles beacon TX.)

> Jan =A01 00:01:32 wlanmon: (RTM_IEEE80211_JOIN) [wlan1] [00:c0:c1:cb:6c:c=
2]

> Expensive timeout(9) function: 0xc05aa150(0xc58c3b80) 0.013488188 s

What was this caused by again? Which part of ath_calibrate() was
causing the issue?
Is it the noise floor save/load? IQ calibration? ANI? Anything else?

> Jan =A01 00:16:45 wlanmon: (RTM_IEEE80211_ASSOC) [wlan2] [00:c0:c1:cb:6c:=
c3]
> lock order reversal:
> =A01st 0xc59126c0 ath1_node_lock (ath1_node_lock) @ /usr/src/sys/net80211=
/ieee80211_ioctl.c:1326
> =A02nd 0xc5911014 ath1_com_lock (ath1_com_lock) @ /usr/src/sys/net80211/i=
eee80211_node.c:2510

Blah. So the above is in setmlme_dropsta() -> domime() ->
ieee80211_node_leave() (MLME_DISASSOC or MLME_DEAUTH in hostap mode,
on a broadcast address).

What's the second path?  How the heck does ieee80211_parse_beacon()
call ieee80211_node_leave() ?



Adrian



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