Hi,

problem occures when a program (dvbscan) speaks to a usb device (TwinHan
DVB-T Visionplus). Kernel is 2.6.9-rc3-mm3; but it also happened with
earlier kernels (2.6.8, 2.6.8.1, 2.6.9-rc*-mm*). Other USB devices
(chipcard reader) work flawlessly. 

The problem seems to be related to SMP, since if I boot a UP kernel, the
device works as expected.

I've attached .config and dmesg. Please CC me since I'm not subscribed.
I'll provide further information on request.

With kind regards,
Phil

Output of ksymoops:

ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
testing NMI watchdog ... OK.
Machine check exception polling timer started.
3c59x: Donald Becker and others. www.scyld.com/network/vortex.html
0000:02:08.0: 3Com PCI 3c905C Tornado at 0x9800. Vers LK1.1.19
eip: c02b83e1
kernel BUG at include/asm/spinlock.h:136!
invalid operand: 0000 [#1]
CPU:    1
EIP:    0060:[<c012f2f5>]    Not tainted VLI
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010092   (2.6.9-rc3-mm3)
eax: 0000000e   ebx: dea6401c   ecx: c02f5494   edx: 00000096
esi: 00000246   edi: 00000000   ebp: db705e1c   esp: db705e04
ds: 007b   es: 007b   ss: 0068
Stack: c02c5fd3 c02b83e1 00000163 00000246 dea6401c 00000000 db705e28
c02b83e1
       dea64000 db705e3c e09c92a4 e09e8000 e09e8000 dea64000 db705e58
e09c9491
       dea6463c db705e50 00000000 e09e8000 dea6463c db705e70 e09d7174
dea64458
Call Trace:
 [<c0104e1a>]
 [<c0104f95>]
 [<c01051a0>]
 [<c0105654>]
 [<c0104a3d>]
 [<c02b83e1>]
 [<e09c92a4>]
 [<e09c9491>]
 [<e09d7174>]
 [<e09d4bb4>]
 [<e09d5425>]
 [<e09d383a>]
 [<e09d551a>]
 [<c0164535>]
 [<c0103f81>]
Code: f8 8b 7d fc c9 c3 8b 55 f0 31 c9 89 d8 e8 34 fd ff ff 66 89 43 02
eb e3 8b 45 04 c7 04 24 d3 5f 2c c0 89 44 24 04 e8 1b a9 fe ff <0f> 0b
88 00 3c 58 2c c0 e9 57 ff ff ff 8b 45 04 c7 04 24 d3 5f


>>EIP; c012f2f5 <_metered_spin_lock_flags+c5/100>   <=====

>>ebx; dea6401c <pg0+1e6c301c/3fc5d400>
>>ecx; c02f5494 <log_wait+8/10>
>>ebp; db705e1c <pg0+1b364e1c/3fc5d400>
>>esp; db705e04 <pg0+1b364e04/3fc5d400>

Trace; c0104e1a <show_stack+7a/90>
Trace; c0104f95 <show_registers+145/1c0>
Trace; c01051a0 <die+f0/180>
Trace; c0105654 <do_invalid_op+d4/f0>
Trace; c0104a3d <error_code+2d/38>
Trace; c02b83e1 <_spin_lock_irqsave+11/20>
Trace; e09c92a4 <pg0+206282a4/3fc5d400>
Trace; e09c9491 <pg0+20628491/3fc5d400>
Trace; e09d7174 <pg0+20636174/3fc5d400>
Trace; e09d4bb4 <pg0+20633bb4/3fc5d400>
Trace; e09d5425 <pg0+20634425/3fc5d400>
Trace; e09d383a <pg0+2063283a/3fc5d400>
Trace; e09d551a <pg0+2063451a/3fc5d400>
Trace; c0164535 <sys_ioctl+1d5/230>
Trace; c0103f81 <sysenter_past_esp+52/71>

This architecture has variable length instructions, decoding before eip
is unreliable, take these instructions with a pinch of salt.

Code;  c012f2ca <_metered_spin_lock_flags+9a/100>
00000000 <_EIP>:
Code;  c012f2ca <_metered_spin_lock_flags+9a/100>
   0:   f8                        clc
Code;  c012f2cb <_metered_spin_lock_flags+9b/100>
   1:   8b 7d fc                  mov    0xfffffffc(%ebp),%edi
Code;  c012f2ce <_metered_spin_lock_flags+9e/100>
   4:   c9                        leave
Code;  c012f2cf <_metered_spin_lock_flags+9f/100>
   5:   c3                        ret
Code;  c012f2d0 <_metered_spin_lock_flags+a0/100>
   6:   8b 55 f0                  mov    0xfffffff0(%ebp),%edx
Code;  c012f2d3 <_metered_spin_lock_flags+a3/100>
   9:   31 c9                     xor    %ecx,%ecx
Code;  c012f2d5 <_metered_spin_lock_flags+a5/100>
   b:   89 d8                     mov    %ebx,%eax
Code;  c012f2d7 <_metered_spin_lock_flags+a7/100>
   d:   e8 34 fd ff ff            call   fffffd46 <_EIP+0xfffffd46>
Code;  c012f2dc <_metered_spin_lock_flags+ac/100>
  12:   66 89 43 02               mov    %ax,0x2(%ebx)
Code;  c012f2e0 <_metered_spin_lock_flags+b0/100>
  16:   eb e3                     jmp    fffffffb <_EIP+0xfffffffb>
Code;  c012f2e2 <_metered_spin_lock_flags+b2/100>
  18:   8b 45 04                  mov    0x4(%ebp),%eax
Code;  c012f2e5 <_metered_spin_lock_flags+b5/100>
  1b:   c7 04 24 d3 5f 2c c0      movl   $0xc02c5fd3,(%esp)
Code;  c012f2ec <_metered_spin_lock_flags+bc/100>
  22:   89 44 24 04               mov    %eax,0x4(%esp)
Code;  c012f2f0 <_metered_spin_lock_flags+c0/100>
  26:   e8 1b a9 fe ff            call   fffea946 <_EIP+0xfffea946>

This decode from eip onwards should be reliable

Code;  c012f2f5 <_metered_spin_lock_flags+c5/100>
00000000 <_EIP>:
Code;  c012f2f5 <_metered_spin_lock_flags+c5/100>   <=====
   0:   0f 0b                     ud2a      <=====
Code;  c012f2f7 <_metered_spin_lock_flags+c7/100>
   2:   88 00                     mov    %al,(%eax)
Code;  c012f2f9 <_metered_spin_lock_flags+c9/100>
   4:   3c 58                     cmp    $0x58,%al
Code;  c012f2fb <_metered_spin_lock_flags+cb/100>
   6:   2c c0                     sub    $0xc0,%al
Code;  c012f2fd <_metered_spin_lock_flags+cd/100>
   8:   e9 57 ff ff ff            jmp    ffffff64 <_EIP+0xffffff64>
Code;  c012f302 <_metered_spin_lock_flags+d2/100>
   d:   8b 45 04                  mov    0x4(%ebp),%eax
Code;  c012f305 <_metered_spin_lock_flags+d5/100>
  10:   c7                        .byte 0xc7
Code;  c012f306 <_metered_spin_lock_flags+d6/100>
  11:   04 24                     add    $0x24,%al
Code;  c012f308 <_metered_spin_lock_flags+d8/100>
  13:   d3                        .byte 0xd3
Code;  c012f309 <_metered_spin_lock_flags+d9/100>
  14:   5f                        pop    %edi