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.
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