Date: Wed, 01 Aug 2001 12:50:33 +0900 From: FUJIMOTO Kou <fujimoto@j.dendai.ac.jp> To: freebsd-current@freebsd.org Subject: ohci_process_done hangs when uhub detached Message-ID: <3B677C89.D72AA4C8@j.dendai.ac.jp>
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Hi,
Last weekend I replaced my socket7 MVP3 board (w/ K6-2+)
to ASUS CUSI-FX socket370 SiS630E board (w/ VIA C3 733MHz),
then I found kernel panics when USB HUBs are detached.
My USB setup is as follows:
FreeBSD PC----------+
|
CPU_switcher----HUB1----HUB2-----Mouse
| |
Windows PC----------+ +----USB-PS/2---Keyboard
Mouse and USB-PS/2 translator are detached safely.
When switching FreeBSD to Windows, kernel hangs with flood of
"db>" prompts. This is also the case when I pull out USB cable
between switcher and HUB1.
When pulling cable between HUB1-HUB2 out, the following error
messages are indicated and I can check trace result:
====================================================================
uhub3: detached
ohci_device_ctrl_close: pipe=0xc122e580
ohci_process_done: err cc=5 (DEVICE_NOT_RESPONDING), xfer=0xc103b500
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xdeadc0e6
fault code = supervisor write, page not present
instruction pointer = 0x8:0xc01daa5d
stack pointer = 0x10:0xc79a5f20
frame pointer = 0x10:0xc79a5f34
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def31 1, gran 1
processor eflags = interrupt enabled, resume, IOPL=0
current process = 18 (irq 9: ohci0++)
kernel: type 12 trap, code=0
Stopped at ohci_process_done+0x21d: movl %eax,0x8(%edx)
db> trace
ohci_process_done(c080e000,580620,c1024340,c1016a80,4)at
ohci_process_done+0x21d
ohci_intr1(c080e000,c79a5f7c,c0214157,c080e000,c0213e98) at
ohci_intr1+0x139
ohci_intr(c080e000) at ohci_intr+0x15
ithread_loop(c1016a80,c79af5fa8) at ithread_loop+0x2bf
fork_exit(c0213e98,c1016a80,c79a5fa8) at fork_exit+0xb4
fork_trampoline() at fork_trampoline+0x8
db>
======================================================================
With MVP3 chipset (UHCI) the setup above have worked peacefully, so
I guess it's due to OHCI code and/or SiS 630E chipset.
--
FUJIMOTO Kou, Dept. of Information Sciences, Tokyo Denki Univ.
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