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Date: Mon, 10 Feb 2014 22:39:59 +0100 From: Peter Zijlstra <peterz@...radead.org> To: Dave Jones <davej@...hat.com> Cc: netdev@...r.kernel.org Subject: Re: irda: BUG: looking up invalid subclass: 4294967295 On Mon, Feb 10, 2014 at 04:31:26PM -0500, Dave Jones wrote: > Is this irda being crap, or some weird lockdep corner case ? > > (no idea what the W taint was, some unrelated spew pushed it out > of the dmesg buffer before it got chance to hit the log) > > Dave > > BUG: looking up invalid subclass: 4294967295 That's -1 if I'm not mistaken, that's indeed an invalid subclass. > turning off the locking correctness validator. > CPU: 0 PID: 1965 Comm: trinity-main Tainted: G W 3.14.0-rc1+ #108 > 00000000ffffffff 00000000a8765326 ffff880205ee7c40 ffffffff9872ae0a > 00000000ffffffff ffff880205ee7c58 ffffffff9872732c ffff880084069730 > ffff880205ee7cd0 ffffffff980c10e2 000000010016000f 00000000ffffffff > Call Trace: > [<ffffffff9872ae0a>] dump_stack+0x4e/0x7a > [<ffffffff9872732c>] look_up_lock_class.part.18+0x2f/0x34 > [<ffffffff980c10e2>] __lock_acquire.isra.28+0x722/0xa50 > [<ffffffff9873a01b>] ? preempt_count_sub+0x6b/0xf0 > [<ffffffff980c1b6d>] lock_acquire+0x8d/0x120 > [<ffffffffc05438f2>] ? hashbin_delete+0xf2/0x100 [irda] > [<ffffffffc0545e30>] ? irias_delete_value+0x30/0x30 [irda] > [<ffffffff987357fc>] _raw_spin_lock_irqsave_nested+0x4c/0x70 > [<ffffffffc05438f2>] ? hashbin_delete+0xf2/0x100 [irda] > [<ffffffffc05438f2>] hashbin_delete+0xf2/0x100 [irda] I tried looking at that code but gave up real quick.. That code is 'creative'. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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