linux-kernel - Re: [lockdep warning] AOE / networking: aoenet_xmit: noop_qdisc.q.lock, INFO: inconsistent lock state at 0000000000000370

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Message-Id: <20080724.232521.193699299.davem@davemloft.net>
Date:	Thu, 24 Jul 2008 23:25:21 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mingo@...e.hu
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	ecashin@...aid.com, axboe@...e.de, mike.miller@...com,
	a.p.zijlstra@...llo.nl, rjw@...k.pl
Subject: Re: [lockdep warning] AOE / networking: aoenet_xmit:
 noop_qdisc.q.lock, INFO: inconsistent lock state at 0000000000000370

From: Ingo Molnar <mingo@...e.hu>
Date: Fri, 25 Jul 2008 08:20:09 +0200

> not sure whether it got reported already, but -tip testing triggered 
> this new ATA over Ethernet lockdep warning on latest -git:

Thanks for the report, does this fix it?

diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 4ac7e3a..43abd4d 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -736,9 +736,9 @@ static void shutdown_scheduler_queue(struct net_device *dev,
 		dev_queue->qdisc = qdisc_default;
 		dev_queue->qdisc_sleeping = qdisc_default;
 
-		spin_lock(root_lock);
+		spin_lock_bh(root_lock);
 		qdisc_destroy(qdisc);
-		spin_unlock(root_lock);
+		spin_unlock_bh(root_lock);
 	}
 }
 
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