From mboxrd@z Thu Jan  1 00:00:00 1970
From: Johannes Berg <johannes@sipsolutions.net>
Date: Fri, 10 Dec 2010 19:47:54 +0100
Subject: b43 N PHY status report
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To: Francesco Gringoli <francesco.gringoli@ing.unibs.it>
Cc: Larry Finger <larry.finger@lwfinger.net>, =?UTF-8?Q?Rafa=C5=82_Mi=C5=82ecki?= <zajec5@gmail.com>, wireless <linux-wireless@vger.kernel.org>, b43-dev <b43-dev@lists.infradead.org>

On Fri, 2010-12-10 at 19:30 +0100, Francesco Gringoli wrote:

> [ 1117.516031] unregister_netdevice: waiting for wlan1 to become free. Usage count = 1
> 
> and the device is never release (by who?). I have to reboot.

That's a bug in the ipv6 code, upgrade your kernel :-)

johannes