From: Jarek Poplawski <jarkao2@gmail.com>
To: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Subject: Re: iw lockdep warning on wireless-testing
Date: Tue, 24 Jun 2008 17:03:19 +0200 [thread overview]
Message-ID: <48610CB7.5030705@gmail.com> (raw)
In-Reply-To: <1214298350.14590.238.camel@debian.sh.intel.com>
Zhu Yi wrote, On 06/24/2008 11:05 AM:
> On Tue, 2008-06-24 at 10:59 +0200, Johannes Berg wrote:
>>> [ INFO: possible circular locking dependency detected ]
>>> 2.6.26-rc6-wl #57
>>> -------------------------------------------------------
>>> iw/2763 is trying to acquire lock:
>>> (genl_mutex){--..}, at: [<ffffffff81216e4c>] ctrl_dumpfamily
>> +0x31/0xf7
>>> but task is already holding lock:
>>> (nlk->cb_mutex){--..}, at: [<ffffffff812137c8>] netlink_dump
>> +0x40/0x19d
>>> which lock already depends on the new lock.
>> None of those is anything nl80211 has influence over, afaict.
>
> Agreed. I can follow the two scenarios below. Apparently it's a ABBA
> locking issue. Just don't know which should be the correct sequence for
> using with the two locks.
>
It should be fixed by this patch:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=6d1a3fb567a728d31474636e167c324702a0c38b
Regards,
Jarek P.
prev parent reply other threads:[~2008-06-24 15:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-24 7:39 iw lockdep warning on wireless-testing Zhu Yi
2008-06-24 8:59 ` Johannes Berg
2008-06-24 9:05 ` Zhu Yi
2008-06-24 15:03 ` Jarek Poplawski [this message]
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