Hardware Environment:
Problem Description:

Steps to reproduce:
# modprobe ov511
# rmmod ov511
# cat /proc/bus/usb/devices

Part of syslog:
Apr 13 20:26:46 iris kernel:  printing eip:
Apr 13 20:26:46 iris kernel: c027dd35
Apr 13 20:26:46 iris kernel: Oops: 0000 [#1]
Apr 13 20:26:46 iris kernel: CPU:    0
Apr 13 20:26:46 iris kernel: EIP:    0060:[usb_dump_interface_descriptor+85/176]
   Not tainted
Apr 13 20:26:46 iris kernel: EFLAGS: 00010282
Apr 13 20:26:46 iris kernel: EIP is at usb_dump_interface_descriptor+0x55/0xb0
Apr 13 20:26:46 iris kernel: eax: e09e9640   ebx: d51d9e40   ecx: c036459b  
edx: c036118b
Apr 13 20:26:46 iris kernel: esi: d456e0cd   edi: d0ef0680   ebp: 00000000  
esp: d595fd80
Apr 13 20:26:46 iris kernel: ds: 007b   es: 007b   ss: 0068
Apr 13 20:26:46 iris kernel: Process cat (pid: 4583, threadinfo=d595e000
task=d0d51280)
Apr 13 20:26:46 iris kernel: Stack: 000000ff d456ff00 d456e0a6 d456ff00 c01b4b07
d456e0a6 2ba91f5a c03547cc 
Apr 13 20:26:46 iris kernel:        d595fdd4 c01b4b2f d0ef0680 d456e0cd d51d9e40
c027ddc5 d456e0cd d456ff00 
Apr 13 20:26:46 iris kernel:        d0ef0680 00000000 d0ef0680 00000001 d456e0cd
d456ff00 c027df14 00000002 
Apr 13 20:26:46 iris kernel: Call Trace:
Apr 13 20:26:46 iris kernel:  [vsprintf+39/48] vsprintf+0x27/0x30
Apr 13 20:26:46 iris kernel:  [sprintf+31/48] sprintf+0x1f/0x30
Apr 13 20:26:46 iris kernel:  [usb_dump_interface+53/128]
usb_dump_interface+0x35/0x80
Apr 13 20:26:46 iris kernel:  [usb_dump_config+148/224] usb_dump_config+0x94/0xe0
Apr 13 20:26:46 iris kernel:  [usb_dump_desc+170/192] usb_dump_desc+0xaa/0xc0
Apr 13 20:26:46 iris kernel:  [usb_device_dump+296/832] usb_device_dump+0x128/0x340
Apr 13 20:26:46 iris kernel:  [usb_device_dump+603/832] usb_device_dump+0x25b/0x340
Apr 13 20:26:46 iris kernel:  [usb_device_dump+603/832] usb_device_dump+0x25b/0x340
Apr 13 20:26:46 iris kernel:  [usb_device_read+194/272] usb_device_read+0xc2/0x110
Apr 13 20:26:46 iris kernel:  [vfs_read+188/304] vfs_read+0xbc/0x130
Apr 13 20:26:46 iris kernel:  [sys_read+62/96] sys_read+0x3e/0x60
Apr 13 20:26:46 iris kernel:  [syscall_call+7/11] syscall_call+0x7/0xb
Apr 13 20:26:46 iris kernel: 
Apr 13 20:26:46 iris kernel: Code: 8b 50 04 89 54 24 24 0f b6 43 07 89 44 24 20
0f b6 43 06 89