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Date: Wed, 19 Aug 2009 17:42:29 -0400
Message-ID: <b6c5339f0908191442j6b5733f3rb28967060abdbace@mail.gmail.com>
Subject: Re: WARNING: at net/mac80211/mlme.c:2292
From: Bob Copeland <me@bobcopeland.com>
To: Fabio Comolli <fabio.comolli@gmail.com>
Cc: linux-wireless@vger.kernel.org,
	"Luis R. Rodriguez" <mcgrof@gmail.com>
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On Wed, Aug 19, 2009 at 4:47 PM, Fabio Comolli<fabio.comolli@gmail.com> wrote:
> Hi all.
> I see the following warning on an eeePC 900 (AR5001) running
> 2.6.31-rc6 after a suspend/resume cycle:
>
> [ ?292.377941] ------------[ cut here ]------------
> [ ?292.377976] WARNING: at net/mac80211/mlme.c:2292
> ieee80211_sta_work+0x89/0xc39 [mac80211]()

    if (WARN_ON(local->suspended)) ...

> [ ?292.378457] ?[<c10199da>] ? __wake_up+0x1d/0x3d
> [ ?292.378466] ?[<c102a529>] ? insert_work+0x8f/0x96
> [ ?292.378473] ?[<c102a777>] ? queue_work_on+0x24/0x2b
> [ ?292.378480] ?[<c102a7a5>] ? queue_work+0x1a/0x39
> [ ?292.378506] ?[<f87e64dc>] ?
> ieee80211_mlme_notify_scan_completed+0x40/0x66 [mac80211]
> [ ?292.378532] ?[<f87e3caa>] ? ieee80211_scan_completed+0x2ef/0x2fc [mac80211]

Looks like ieee80211_scan_completed() racing with suspend()?

> ieee80211_mesh_notify_scan_completed+0x4d/0x64 [mac80211]
> Aug 10 20:08:35 archeee kernel: [ 1440.841185] ?[<f84860ce>] ?
> ieee80211_scan_completed+0x327/0x32f [mac80211]

Same here.

> The effect is that after the warning the interface is unusable until
> disabled and reenabled with the rfkill switch.

Interesting, I tried and didn't reproduce it, but I wasn't trying
while scanning before.

-- 
Bob Copeland %% www.bobcopeland.com