Hello,

 Can anyone give pointers where to start looking for more information
 about the problem below? My little experience so far is with nic
 drivers and I don't have time to start reading on usb guts,
 unfortunately.

----- Forwarded message from Jaakko Niemi <[EMAIL PROTECTED]> -----
From: Jaakko Niemi <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Date: Mon, 14 Jun 2004 13:39:55 +0300
Subject: Re: [Linux-usb-users] Edgeport problems

On Tue, 08 Jun 2004, Jaakko Niemi wrote:
>  Hello,
> 
>  I have couple different problems with two different Edgeport boxes,
>  which are hooked into a Dell PowerEdge 1750 with ServerWorks OSB4/CSB5
>  ohci usb controller, running 2.4.26 without any patches. 
> 
>  First, with older Edgeport/8, if I try to access any of /dev/ttyUSBx
>  devices, the machine hangs hard. Not even a blip on serial console,
>  nor to normal console, even with debug=1 option given to the
>  io_edgeport driver. Now, how does one debug hangs like this? 

 Ok, here we go. Anyone?

ksymoops 2.4.9 on i686 2.4.26es.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.26es/ (default)
     -m /boot/System.map-2.4.26es (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.

NMI Watchdog detected LOCKUP on CPU1, eip f8b9cedb, registers:
CPU:    1
EIP:    0060:[<f8b9cedb>]    Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00000086
eax: 00000003   ebx: 00000040   ecx: f76fa000   edx: eba8a000
esi: eb6e8800   edi: 00000012   ebp: eb8b33c0   esp: c19b5e54
ds: 0068   es: 0068   ss: 0068
Process swapper (pid: 0, stackpage=c19b5000)
Stack: eb3a6c00 00000282 ffffffff 37000000 00000001 00000000 00000202
00000000 
       c0408380 00000026 eb8b33c0 eba8a000 0000000a 00000001 eb6e8800
00000012 
       eb8b33c0 f8b8766d eb926880 f8ba7910 eb926880 f8bac83c f8bac855
00000003 
Call Trace:    [<f8b8766d>] [<f8ba7910>] [<f8bac83c>] [<f8bac855>]
[<f8b994b0>]
  [<f8b9b91a>] [<f8b9c6bd>] [<c01097c9>] [<c01099e8>] [<c01053b0>]
[<c010c358>]
  [<c01053b0>] [<c01053d9>] [<c0105472>] [<c011d105>] [<c011d37f>]
Code: 7e f8 e9 ad c6 ff ff 80 7b 28 00 f3 90 7e f8 e9 0c cc ff ff 


>>EIP; f8b9cedb <[usb-ohci].text.lock.usb_ohci+6/74>   <=====

>>ecx; f76fa000 <_end+3730a420/38558480>
>>edx; eba8a000 <_end+2b69a420/38558480>
>>esi; eb6e8800 <_end+2b2f8c20/38558480>
>>ebp; eb8b33c0 <_end+2b4c37e0/38558480>
>>esp; c19b5e54 <_end+15c6274/38558480>

Trace; f8b8766d <[usbcore]usb_submit_urb+3d/40>
Trace; f8ba7910 <[io_edgeport]edge_interrupt_callback+110/340>
Trace; f8bac83c <[io_edgeport].rodata.end+61/2325>
Trace; f8bac855 <[io_edgeport].rodata.end+7a/2325>
Trace; f8b994b0 <[usb-ohci]sohci_return_urb+f0/120>
Trace; f8b9b91a <[usb-ohci]dl_done_list+ca/110>
Trace; f8b9c6bd <[usb-ohci]hc_interrupt+1ad/220>
Trace; c01097c9 <handle_IRQ_event+79/b0>
Trace; c01099e8 <do_IRQ+98/f0>
Trace; c01053b0 <default_idle+0/50>
Trace; c010c358 <call_do_IRQ+5/d>
Trace; c01053b0 <default_idle+0/50>
Trace; c01053d9 <default_idle+29/50>
Trace; c0105472 <cpu_idle+52/70>
Trace; c011d105 <call_console_drivers+65/120>
Trace; c011d37f <printk+14f/180>

Code;  f8b9cedb <[usb-ohci].text.lock.usb_ohci+6/74>
00000000 <_EIP>:
Code;  f8b9cedb <[usb-ohci].text.lock.usb_ohci+6/74>   <=====
   0:   7e f8                     jle    fffffffa <_EIP+0xfffffffa>
<=====
Code;  f8b9cedd <[usb-ohci].text.lock.usb_ohci+8/74>
   2:   e9 ad c6 ff ff            jmp    ffffc6b4 <_EIP+0xffffc6b4>
Code;  f8b9cee2 <[usb-ohci].text.lock.usb_ohci+d/74>
   7:   80 7b 28 00               cmpb   $0x0,0x28(%ebx)
Code;  f8b9cee6 <[usb-ohci].text.lock.usb_ohci+11/74>
   b:   f3 90                     repz nop 
Code;  f8b9cee8 <[usb-ohci].text.lock.usb_ohci+13/74>
   d:   7e f8                     jle    7 <_EIP+0x7>
Code;  f8b9ceea <[usb-ohci].text.lock.usb_ohci+15/74>
   f:   e9 0c cc ff ff            jmp    ffffcc20 <_EIP+0xffffcc20>


1 warning issued.  Results may not be reliable.

----- End forwarded message -----


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