Return-path: Received: from xc.sipsolutions.net ([83.246.72.84]:40135 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751831AbZJKJwK (ORCPT ); Sun, 11 Oct 2009 05:52:10 -0400 Subject: Re: [mmotm 2009-10-09-01-07] b43/wireless possible circular locking From: Johannes Berg To: Dave Young Cc: akpm@linux-foundation.org, bcm43xx-dev@lists.berlios.de, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20091011094139.GA2778@darkstar> References: <20091011094139.GA2778@darkstar> Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; boundary="=-DMU5TS23gmKbTQaiVcnz" Date: Sun, 11 Oct 2009 11:51:27 +0200 Message-Id: <1255254687.4095.46.camel@johannes.local> Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: --=-DMU5TS23gmKbTQaiVcnz Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sun, 2009-10-11 at 17:41 +0800, Dave Young wrote: > Hi, >=20 > I got lockdep warnings about possible circular lock with > b43 interface startup. It looks like a real problem. >=20 > [ 71.974542] wlan0: deauthenticating from 00:19:e0:db:24:de by local ch= oice (reason=3D3) > [ 72.004352] b43-phy0 debug: Removing Interface type 2 > [ 72.005431]=20 > [ 72.005435] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > [ 72.006168] [ INFO: possible circular locking dependency detected ] > [ 72.006759] 2.6.32-rc3-mm1 #4 > [ 72.007047] ------------------------------------------------------- > [ 72.007617] ifconfig/2175 is trying to acquire lock: > [ 72.007617] (&(&rfkill->poll_work)->work){+.+...}, at: [] _= _cancel_work_timer+0x8c/0x18e > [ 72.007617]=20 > [ 72.007617] but task is already holding lock: > [ 72.007617] (&wl->mutex){+.+.+.}, at: [] b43_op_stop+0x28/0= x6a [b43] I believe this is already taken care of by Larry. johannes --=-DMU5TS23gmKbTQaiVcnz Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- iQIcBAABAgAGBQJK0aqcAAoJEODzc/N7+Qma8WcQAInEII4zTiCniG8SUrC2OcGx 4IpFUwP8+sxdBErWBbTb3Jzrv6qtgEtCCEbnefzaQkNW/3izgj04T4TXgvOPabqg fJclT9wDZBMKgnpKNnF5qNTkXSlSWsxarvQW2CjeV5PIsREF1ZLNJyIN+pQT4Bov t71ommcdxJCBOXwrlQ+dabiuxDv+RPf4HqyY+dcGW4gvpTJS1LR6ScPzeX3Jgn7W /H674OxCRDIA1Uk7yRvjnqxJLvjTbyIp9Z5L46+Dv9k8SZuY1eNJ39rwlAMgf4qZ Lt9XIpGIRKS8tpOTlR5PNFcxzw8jnITlTZuuGq50jzfNN9vrcHJcGkQyxOY+NkEL A+AU/EqlgDSZ+72DAMoEM/N3ALmUHycP4FEzDdzDUEGgpL8w+oiJMfOvtWxxvRH+ xc0dRq5nJGLSt/hs+G79nfFfAEb62dLj+rYMpHkaA5C66cz6xjd0lp1TiZixKnbl CbEv1I3u6np5tBFbBlC1F2IxUlQ3DBhSG1fNX2/Ivjn8tTkDeidWuUzgR4mZuGz+ gLJaH5J984m8UxfuPhhrpsmzI110oqe/SCxDA1digjc+/as2p4nqAMUqFiBg00MH 4SfOHEC67LmqsOW3ol2FmvicBwKjScvrs9BIAp+XVdWTVfjtLbIYrkixS+hBOuWt mRn2GKV+Uxpv/RWFca5s =5l5U -----END PGP SIGNATURE----- --=-DMU5TS23gmKbTQaiVcnz--