Date: Mon, 27 Dec 2004 01:00:30 +0100 From: Marcin Wisnicki <mwisnicki@gmail.com> To: freebsd-usb@freebsd.org Subject: Re: panic w/ USB<->serial adapter and modem Message-ID: <dabd710304122616006b850c7e@mail.gmail.com> In-Reply-To: <200412190252.iBJ2q1eW002380@wattres.watt.com> References: <200412190252.iBJ2q1eW002380@wattres.watt.com>
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On Sat, 18 Dec 2004 18:52:01 -0800, Steve Watt <steve@watt.com> wrote:
> I've got a 5.3-STABLE (updated 19 Nov around 2000PST) machine that
> has serious difficulty when I attempt to use the modems that are
> attached via the Prolofic Technology PL2303 serial adapters.
I'm having similar problems on that device with an isdn modem (it
works like normal serial modem) and ppp, using latest 5-stable.
Sometimes under heavy load (for example during buildworld),
system will panic with "uhci_abort_xfer: not in process context".
Since I've finally managed to get a crashdump, I'm able to post a backtrace:
make gdbinit
kgdb -n0 kernel.debug
(kgdb) getsyms
(kgdb) bt
#0 doadump () at pcpu.h:159
#1 0xc0491773 in boot (howto=0x104) at /usr/src/sys/kern/kern_shutdown.c:410
#2 0xc0491acb in panic (fmt=0xc0752f24 "uhci_abort_xfer: not in
process context")
at /usr/src/sys/kern/kern_shutdown.c:566
#3 0xc073feea in uhci_abort_xfer (xfer=0xc1763e00,
status=USBD_NORMAL_COMPLETION)
at /usr/src/sys/modules/usb/../../dev/usb/uhci.c:1956
#4 0xc073f6b9 in uhci_timeout_task (addr=0x0) at
/usr/src/sys/modules/usb/../../dev/usb/uhci.c:1534
#5 0xc0738f2e in usb_task_thread (arg=0x0) at
/usr/src/sys/modules/usb/../../dev/usb/usb.c:464
#6 0xc04779af in fork_exit (callout=0xc0738e90 <usb_task_thread>,
arg=0x0, frame=0x0)
at /usr/src/sys/kern/kern_fork.c:807
#7 0xc05d41ac in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:209
This looks like the one in kern/67301, though I don't know why some
arguments in my backtrace are wrong (I suppose they shouldn't be 0).
I compiled almost everything in modules, but I hope that I've loaded
symbols correctly
usbdevs -v
Controller /dev/usb0:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000),
VIA(0x0000), rev 1.00
port 1 addr 2: full speed, self powered, config 1, DeskJet
920C(0x1504), Hewlett-Packard(0x03f0), rev 1.00
port 2 addr 3: full speed, power 100 mA, config 1, PL2303 Serial
adapter (ATEN/IOGEAR UC232A)(0x2303), Prolific Technology(0x067b), rev
2.02
Controller /dev/usb1:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000),
VIA(0x0000), rev 1.00
port 1 powered
port 2 powered
Controller /dev/usb2:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000),
VIA(0x0000), rev 1.00
port 1 powered
port 2 powered
Controller /dev/usb3:
addr 1: high speed, self powered, config 1, EHCI root hub(0x0000),
VIA(0x0000), rev 1.00
port 1 powered
port 2 powered
port 3 powered
port 4 powered
port 5 powered
port 6 powered
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