Date: Wed, 29 Sep 2010 07:56:51 -0400 From: John Baldwin <jhb@freebsd.org> To: Anton Shterenlikht <mexas@bristol.ac.uk> Cc: freebsd-current@freebsd.org Subject: Re: amd64 panic: lock (sleep mutex) ral0 not locked @ /usr/src/sys/dev/ral/rt2560.c:2012 Message-ID: <201009290756.51326.jhb@freebsd.org> In-Reply-To: <alpine.BSF.2.00.1009291128290.66572@mech-cluster241.men.bris.ac.uk> References: <20100925195334.GA58609@mech-cluster241.men.bris.ac.uk> <201009271120.36337.jhb@freebsd.org> <alpine.BSF.2.00.1009291128290.66572@mech-cluster241.men.bris.ac.uk>
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On Wednesday, September 29, 2010 6:34:09 am Anton Shterenlikht wrote:
>
> On Mon, 27 Sep 2010, John Baldwin wrote:
>
> > On Saturday, September 25, 2010 3:53:34 pm Anton Shterenlikht wrote:
> >> On amd64 r213168 I've a ral(4) CardBus
> >> wireless device of obscure origin.
> >> It is identified as
> >>
> >> db> bt
> >> Tracing pid 0 tid 100068 td 0xffffff0001b59440
> >> kbd_enter() at kbd_enter+0x3d
> >> panic() at panic+0x17b
> >> witness_unlock() at witness_unlock+0x297
> >> _mtx_unlock_flags() at _mtx_unlock_flags+0x7e
> >> rt2560_ioctl() at rt2560_ioctl+0xbf
> >> taskqueue_run() at taskqueue_run+0x63
> >> taskqueue_thread_loop() at taskqueue_thread_loop+0x54
> >> fork_exit() at fork_exit+0x12a
> >> fork_trampoline() at fork_trampoline+0xe
> >> --- trap 0, rip 0, rsp=0xffffff80b2d41cf0, rbp = 0 ---
> >
> > This will likely fix your panic, but I think the card is likely to still not
> > work:
> >
> > Index: rt2560.c
> > ===================================================================
> > --- rt2560.c (revision 212900)
> > +++ rt2560.c (working copy)
> > @@ -2667,8 +2667,7 @@
> > RAL_WRITE(sc, RT2560_CSR1, RT2560_HOST_READY);
> >
> > if (rt2560_bbp_init(sc) != 0) {
> > - rt2560_stop(sc);
> > - RAL_UNLOCK(sc);
> > + rt2560_stop_locked(sc);
> > return;
> > }
> >
>
> John,
>
> You are right, the panic has got away, but
> the card doesn't seem to work. After
> issuing "ifconfig wlan0 up scan" I just
> get lots of
>
> ral0: could not read from BBP
> ral0: timeout waiting for BBP
>
> messages on the console.
>
> Shall I give up on this particular device?
Unfortunately I can't help with this part. :( I suspect the card is broken
however.
--
John Baldwin
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