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From: Simon Wunderlich <sw@simonwunderlich.de>
To: Kalle Valo <kvalo@qca.qualcomm.com>
Subject: Re: Circular lock with mac80211_hwsim and DFS
Date: Tue, 17 Dec 2013 18:05:34 +0100
Cc: linux-wireless@vger.kernel.org
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> Hi,
> 
> I tried to run a simple DFS test with mac80211_hwsim for the first time
> but got the deadlock below. Is this a regression or has DFS ever worked
> with hwsim?
> 
> Using 31e1798fbf from mac80211-next.

just checked again with mac80211-next for ath9k, and I don't see this lockdep 
problem. Appearently this is a problem in hwsim only ....

Cheers,
   Simon