Hmmm ... Does that happen when you "ifdown usb0" first?
Or when you use ohci? I've seen usb-uhci oops in such
cases, not uhci. I wondered if it was related to using async
unlink by preference, but one of the two shutdown paths
in "usbnet" might well have a bug.
Do you get more info if you enable verbose usb debug messages,
or does that make it go away?
- Dave
----- Original Message -----
From: "Oleg Drokin" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Friday, March 09, 2001 10:51 AM
Subject: [linux-usb-devel] khubd oops in 2.4.2-ac16
> Hello!
>
> I experience a lot of troubles with uhci driver driver, in different kernels.
> Usually it just panics on device insertion or removal, but this time I got
> lucky, and oops was not fatal, so here it is decoded. As I can see,
> something stomped on usb_device structure of unplugged device.
> (do not sugget to use usb-uhci driver, it work even worse for me).
> Device that's unplugged is compaq ipaq, driver used is usbnet.c
> Host is USB built into Sony Vaio:
> 00:07.2 USB Controller: Intel Corporation 82371AB PIIX4 USB (rev 01)
> That's what I have in logs prior to oops:
> Mar 9 19:32:21 notebook1 kernel: usb0: register usbnet 001/009, Linux Device
> Mar 9 21:11:31 notebook1 kernel: usb.c: USB disconnect on device 1043477052
>
> Here is oops (decoded):
>
> ksymoops 2.3.5 on i686 2.4.2-ac16. Options used
> -V (default)
> -k /proc/ksyms (default)
> -l /proc/modules (default)
> -o /lib/modules/2.4.2-ac16/ (default)
> -m /usr/src/linux/System.map (default)
>
> Warning: You did not tell me where to find symbol information. I will
> assume that the log matches the kernel and modules that are running
> right now and I'll use the default options above for symbol resolution.
> If the current kernel and/or modules do not match the log, you can get
> more accurate output by telling me the kernel version and where to find
> map, modules, ksyms etc. ksymoops -h explains the options.
>
> Warning (compare_maps): mismatch on symbol __module_author , usbnet says c89338c0,
/lib/modules/2.4.2-ac16/kernel/drivers/usb/usbnet.o says c893472c. Ignoring
/lib/modules/2.4.2-ac16/kernel/drivers/usb/usbnet.o entry
> Warning (compare_maps): mismatch on symbol __module_description , usbnet says
>c8933900,
/lib/modules/2.4.2-ac16/kernel/drivers/usb/usbnet.o says c893476c. Ignoring
/lib/modules/2.4.2-ac16/kernel/drivers/usb/usbnet.o entry
> Reading Oops report from the terminal
> Unable to handle kernel paging request at virtual address bde87719
> c018cb8b
> *pde = 00000000
> Oops: 0000
> CPU: 0
> EIP: 0010:[<c018cb8b>]
> Using defaults from ksymoops -t elf32-i386 -a i386
> EFLAGS: 00010246
> eax: 0000002e ebx: 0000000a ecx: c06e6e00 edx: bde87715
> esi: 00000100 edi: 00000001 ebp: 00000000 esp: c127bf60
> ds: 0018 es: 0018 ss: 0018
> Process khubd (pid: 9, stackpage=c127b000)
> Stack: 0000000a 00000100 00000001 00000003 c018ec53 c06e6e00 c018ec92 c7f838ec
> 00030100 00000000 00000001 00000003 00000000 c7f838ec c7f838ec 00000000
> c127bfdc 00000004 00000064 c018f010 c7f83800 00000000 c127bfdc c127a000
> Call Trace: [<c018ec53>] [<c018ec92>] [<c018f010>] [<c018f1b5>] [<c0105000>]
>[<c010744f>]
> Code: 80 7a 04 00 74 6f c7 44 24 10 00 00 00 00 8d b4 26 00 00 00
>
> >>EIP; c018cb8b <usb_disconnect+3f/124> <=====
> Trace; c018ec53 <usb_hub_port_connect_change+2b/2f0>
> Trace; c018ec92 <usb_hub_port_connect_change+6a/2f0>
> Trace; c018f010 <usb_hub_events+f8/278>
> Trace; c018f1b5 <usb_hub_thread+25/44>
> Trace; c0105000 <empty_bad_page+0/1000>
> Trace; c010744f <kernel_thread+23/30>
> Code; c018cb8b <usb_disconnect+3f/124>
> 00000000 <_EIP>:
> Code; c018cb8b <usb_disconnect+3f/124> <=====
> 0: 80 7a 04 00 cmpb $0x0,0x4(%edx) <=====
> Code; c018cb8f <usb_disconnect+43/124>
> 4: 74 6f je 75 <_EIP+0x75> c018cc00
><usb_disconnect+b4/124>
> Code; c018cb91 <usb_disconnect+45/124>
> 6: c7 44 24 10 00 00 00 movl $0x0,0x10(%esp,1)
> Code; c018cb98 <usb_disconnect+4c/124>
> d: 00
> Code; c018cb99 <usb_disconnect+4d/124>
> e: 8d b4 26 00 00 00 00 lea 0x0(%esi,1),%esi
>
>
> 3 warnings issued. Results may not be reliable.
>
> Bye,
> Oleg
>
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