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Date: Wed, 21 Nov 2007 20:13:46 -0500
From: "Luis R. Rodriguez" <mcgrof@gmail.com>
To: "Jan Willies" <jan@willies.info>
Subject: Re: [Developers] ISL3880IK crashes with 2.6.19.1 / .21.1
Cc: jean-baptiste.note@m4x.org, developers@islsm.org,
	linux-wireless@vger.kernel.org, "Kyle McMartin" <kyle@mcmartin.ca>
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On Nov 21, 2007 8:03 PM, Luis R. Rodriguez <mcgrof@gmail.com> wrote:
>
> On Jun 3, 2007 5:33 PM, Jan Willies <jan@willies.info> wrote:
> > Jean-Baptiste Note schrieb:
> > > Hi,
> > >
> > > Any chance you could decode the oops ? If you're recompiling the
> > > kernel yourself, include symbols (can't remember the option name), or
> > > run ksymoops...
> >
> > I recompiled the kernel with KALLSYMS and got this:
> >
> > root@OpenWrt:/# iwconfig
> > lo        no wireless extensions.
> >
> > ethData bus error, epc == c007e16c, ra == c007d6c0
> > Oops[#1]:
> > Cpu 0
> > $ 0   : 00000000 1000b800 abad0000 00000032
> > $ 4   : 00000001 c0068000 00000013 00000001
> > $ 8   : 00000004 800feb8c 00000000 00000000
> > $12   : 00000000 00000000 8124ca40 00000000
> > $16   : 812a7800 000000fa 81361320 81361000
> > $20   : 00000010 00000000 a1cc0000 00000019
> > $24   : 00000000 2abd45f0
> > $28   : 813d6000 813d7ce8 ff02000d c007d6c0
> > Hi    : 000002fc
> > Lo    : 00035866
> > epc   : c007e16c isl38xx_trigger_device+0xc/0x60 [prism54]     Not tainted
> > ra    : c007d6c0 islpci_mgt_transaction+0x380/0x614 [prism54]
> > Status: 1000b803    KERNEL EXL IE
> > Cause : 0000001c
> > PrId  : 00029007
> > Modules linked in: prism54 switch_robo switch_core diag
> > Process iwconfig (pid: 1411, threadinfo=813d6000, task=8106f3f8)
> > Stack : 81108800 8001e418 00000060 00000000 00000000 8106f3f8 8003bf54
> > 813616b0
> >          813616b0 80029ab0 00000004 00000000 00000000 80200ddc 0000008a
> > ff02000d
> >          81361320 813d7d98 81361000 c0086cd0 1000b800 00000000 1000b800
> > 8002964c
> >          00000004 813d7d50 00000000 81271d04 813d7e70 813d7e70 813d7e60
> > 80200ddc
> >          7fcad438 7fcad478 813d7e60 00008b01 c0081628 00000101 00000001
> > 00000000
> >          ...
> > Call Trace:
> > [<c007e16c>] isl38xx_trigger_device+0xc/0x60 [prism54]
> > [<c007d6c0>] islpci_mgt_transaction+0x380/0x614 [prism54]
> > [<c0086cd0>] mgt_get_request+0x100/0x2ec [prism54]
> > [<c0081628>] prism54_set_mac_address+0x1a0/0xfd8 [prism54]
>
> Sorry for the late reply ;) but anyway, I tried looking into this
> finally (with new found knowledge on this subject, thanks to Kyle) and
> I cannot see a place where isl38xx_trigger_device() would trigger
> unaligned access.
>
> Is this issue still present? If so I'd like to get to the bottom of
> it. FYI p54 is there as a replacement but as you may know certain
> features (ad-hoc, ap support, encryption) are still not present in
> that driver.

Actually I've been informed this is not unaligned access problem but
instead it occurs on do_be() or ip22_be_interrupt() on MIPS. I'll have
to check how that works, I do not yet understand how this is reached.

  Luis