Bug 42622 - Bug caused by the ftdi-sio driver
Summary: Bug caused by the ftdi-sio driver
Status: RESOLVED INVALID
Alias: None
Product: Drivers
Classification: Unclassified
Component: USB (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: Greg Kroah-Hartman
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-01-21 15:02 UTC by WZab
Modified: 2012-02-22 21:04 UTC (History)
0 users

See Also:
Kernel Version: 3.1.6, 3.2.1, 3.2.2
Subsystem:
Regression: No
Bisected commit-id:

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Description WZab 2012-01-21 15:02:43 UTC 
When I connected the FT2232H based device to my laptop, I got the following messages in my /var/log/messages (afterwards I had to reboot my system):

Jan 16 10:28:58 WZLap kernel: [  126.692754] usb 4-1.3.4: new high speed USB device number 5 using ehci_hcd
Jan 16 10:28:58 WZLap kernel: [  126.784754] usb 4-1.3.4: New USB device found, idVendor=0403, idProduct=6010
Jan 16 10:28:58 WZLap kernel: [  126.784760] usb 4-1.3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 16 10:28:58 WZLap kernel: [  126.784763] usb 4-1.3.4: Product: Dual RS232-HS
Jan 16 10:28:58 WZLap kernel: [  126.784765] usb 4-1.3.4: Manufacturer: FTDI
Jan 16 10:28:58 WZLap mtp-probe: checking bus 4, device 5: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.4"
Jan 16 10:28:58 WZLap mtp-probe: bus: 4, device: 5 was not an MTP device
Jan 16 10:28:59 WZLap kernel: [  126.928126] usbcore: registered new interface driver usbserial
Jan 16 10:28:59 WZLap kernel: [  126.928153] USB Serial support registered for generic
Jan 16 10:28:59 WZLap kernel: [  126.928198] usbcore: registered new interface driver usbserial_generic
Jan 16 10:28:59 WZLap kernel: [  126.928200] usbserial: USB Serial Driver core
Jan 16 10:28:59 WZLap kernel: [  126.930015] USB Serial support registered for FTDI USB Serial Device
Jan 16 10:28:59 WZLap kernel: [  126.930078] ftdi_sio 4-1.3.4:1.0: FTDI USB Serial Device converter detected
Jan 16 10:28:59 WZLap kernel: [  126.930116] usb 4-1.3.4: Detected FT2232H
Jan 16 10:28:59 WZLap kernel: [  126.930118] usb 4-1.3.4: Number of endpoints 2
Jan 16 10:28:59 WZLap kernel: [  126.930121] usb 4-1.3.4: Endpoint 1 MaxPacketSize 512
Jan 16 10:28:59 WZLap kernel: [  126.930123] usb 4-1.3.4: Endpoint 2 MaxPacketSize 512
Jan 16 10:28:59 WZLap kernel: [  126.930126] usb 4-1.3.4: Setting MaxPacketSize 512
Jan 16 10:28:59 WZLap kernel: [  126.930496] usb 4-1.3.4: FTDI USB Serial Device converter now attached to ttyUSB0
Jan 16 10:28:59 WZLap kernel: [  126.930506] ftdi_sio 4-1.3.4:1.1: FTDI USB Serial Device converter detected
Jan 16 10:28:59 WZLap kernel: [  126.930527] usb 4-1.3.4: Detected FT2232H
Jan 16 10:28:59 WZLap kernel: [  126.930529] usb 4-1.3.4: Number of endpoints 2
Jan 16 10:28:59 WZLap kernel: [  126.930530] usb 4-1.3.4: Endpoint 1 MaxPacketSize 512
Jan 16 10:28:59 WZLap kernel: [  126.930531] usb 4-1.3.4: Endpoint 2 MaxPacketSize 512
Jan 16 10:28:59 WZLap kernel: [  126.930533] usb 4-1.3.4: Setting MaxPacketSize 512
Jan 16 10:28:59 WZLap kernel: [  126.930822] usb 4-1.3.4: FTDI USB Serial Device converter now attached to ttyUSB1
Jan 16 10:28:59 WZLap kernel: [  126.930841] usbcore: registered new interface driver ftdi_sio
Jan 16 10:28:59 WZLap kernel: [  126.930843] ftdi_sio: v1.6.0:USB FTDI Serial Converters Driver
Jan 16 10:29:59 WZLap kernel: [  186.822442] ADDRCONF(NETDEV_UP): eth3: link is not ready
Jan 16 10:32:32 WZLap kernel: [  339.674850] usb 4-1.3.3: new high speed USB device number 6 using ehci_hcd
Jan 16 10:32:32 WZLap mtp-probe: checking bus 4, device 6: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.3"
Jan 16 10:32:32 WZLap kernel: [  339.766479] usb 4-1.3.3: New USB device found, idVendor=03fd, idProduct=0013
Jan 16 10:32:32 WZLap kernel: [  339.766485] usb 4-1.3.3: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Jan 16 10:32:32 WZLap mtp-probe: bus: 4, device: 6 was not an MTP device
Jan 16 10:32:32 WZLap kernel: [  339.989054] usb 4-1.3.3: USB disconnect, device number 6
Jan 16 10:32:53 WZLap kernel: [  360.848348] ftdi_sio ttyUSB1: FTDI USB Serial Device converter now disconnected from ttyUSB1
Jan 16 10:32:53 WZLap kernel: [  360.848362] ftdi_sio 4-1.3.4:1.1: device disconnected
Jan 16 10:33:52 WZLap kernel: [  420.118176] r8169 0000:04:00.0: eth0: link down
Jan 16 10:33:57 WZLap kernel: [  424.958472] r8169 0000:04:00.0: eth0: link down
Jan 16 10:33:57 WZLap kernel: [  424.959235] ADDRCONF(NETDEV_UP): eth0: link is not ready
Jan 16 10:34:37 WZLap kernel: [  464.754920] usb 4-1.3.4: USB disconnect, device number 5
Jan 16 10:34:37 WZLap kernel: [  464.755080] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
Jan 16 10:34:37 WZLap kernel: [  464.755099] ftdi_sio 4-1.3.4:1.0: device disconnected
Jan 16 10:34:45 WZLap kernel: [  472.869383] usb 4-1.3.4: new high speed USB device number 7 using ehci_hcd
Jan 16 10:34:45 WZLap mtp-probe: checking bus 4, device 7: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.4"
Jan 16 10:34:45 WZLap kernel: [  472.961135] usb 4-1.3.4: New USB device found, idVendor=03fd, idProduct=0013
Jan 16 10:34:45 WZLap kernel: [  472.961140] usb 4-1.3.4: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Jan 16 10:34:45 WZLap mtp-probe: bus: 4, device: 7 was not an MTP device
Jan 16 10:34:45 WZLap kernel: [  473.191672] usb 4-1.3.4: USB disconnect, device number 7
Jan 16 10:34:47 WZLap kernel: [  474.926710] usb 4-1.3.4: new full speed USB device number 8 using ehci_hcd
Jan 16 10:34:47 WZLap kernel: [  475.018578] usb 4-1.3.4: not running at top speed; connect to a high speed hub
Jan 16 10:34:47 WZLap kernel: [  475.019827] usb 4-1.3.4: New USB device found, idVendor=03fd, idProduct=0008
Jan 16 10:34:47 WZLap kernel: [  475.019832] usb 4-1.3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 16 10:34:47 WZLap kernel: [  475.019835] usb 4-1.3.4: Product: XILINX    
Jan 16 10:34:47 WZLap kernel: [  475.019838] usb 4-1.3.4: Manufacturer: XILINX 
Jan 16 10:34:47 WZLap mtp-probe: checking bus 4, device 8: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.4"
Jan 16 10:34:47 WZLap mtp-probe: bus: 4, device: 8 was not an MTP device
Jan 16 10:34:50 WZLap kernel: [  477.793974] usb 4-1.3.4: USB disconnect, device number 8
Jan 16 10:34:52 WZLap kernel: [  479.528854] usb 4-1.3.4: new high speed USB device number 9 using ehci_hcd
Jan 16 10:34:52 WZLap kernel: [  479.621225] usb 4-1.3.4: New USB device found, idVendor=03fd, idProduct=0008
Jan 16 10:34:52 WZLap kernel: [  479.621231] usb 4-1.3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 16 10:34:52 WZLap kernel: [  479.621234] usb 4-1.3.4: Product: XILINX    
Jan 16 10:34:52 WZLap kernel: [  479.621236] usb 4-1.3.4: Manufacturer: XILINX 
Jan 16 10:34:52 WZLap mtp-probe: checking bus 4, device 9: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.4"
Jan 16 10:34:52 WZLap mtp-probe: bus: 4, device: 9 was not an MTP device
Jan 16 10:35:29 WZLap kernel: [  516.399929] usb 4-1.3.4: USB disconnect, device number 9
Jan 16 10:48:56 WZLap kernel: [ 1322.962773] usb 4-1.3.4: new high speed USB device number 10 using ehci_hcd
Jan 16 10:48:56 WZLap mtp-probe: checking bus 4, device 10: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.4"
Jan 16 10:48:56 WZLap kernel: [ 1323.054526] usb 4-1.3.4: New USB device found, idVendor=03fd, idProduct=0013
Jan 16 10:48:56 WZLap kernel: [ 1323.054532] usb 4-1.3.4: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Jan 16 10:48:56 WZLap mtp-probe: bus: 4, device: 10 was not an MTP device
Jan 16 10:48:57 WZLap kernel: [ 1323.287089] usb 4-1.3.4: USB disconnect, device number 10
Jan 16 10:48:58 WZLap kernel: [ 1325.020223] usb 4-1.3.4: new full speed USB device number 11 using ehci_hcd
Jan 16 10:48:59 WZLap kernel: [ 1325.451507] usb 4-1.3.4: new full speed USB device number 12 using ehci_hcd
Jan 16 10:48:59 WZLap kernel: [ 1325.875111] usb 4-1.3.4: new full speed USB device number 13 using ehci_hcd
Jan 16 10:49:00 WZLap kernel: [ 1326.354479] usb 4-1.3.4: new full speed USB device number 14 using ehci_hcd
Jan 16 10:59:39 WZLap kernel: [ 1964.655001] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Jan 16 11:00:16 WZLap kernel: [ 2001.546261] cfg80211: Calling CRDA for country: PL
Jan 16 11:03:53 WZLap kernel: [ 2218.809519] cfg80211: Calling CRDA for country: PL
Jan 16 11:06:04 WZLap kernel: [ 2349.540181] usb 4-1.3.4: new full speed USB device number 15 using ehci_hcd
Jan 16 11:06:04 WZLap kernel: [ 2349.631933] usb 4-1.3.4: not running at top speed; connect to a high speed hub
Jan 16 11:06:04 WZLap kernel: [ 2349.633181] usb 4-1.3.4: New USB device found, idVendor=03fd, idProduct=0008
Jan 16 11:06:04 WZLap kernel: [ 2349.633187] usb 4-1.3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 16 11:06:04 WZLap kernel: [ 2349.633190] usb 4-1.3.4: Product: XILINX    
Jan 16 11:06:04 WZLap kernel: [ 2349.633192] usb 4-1.3.4: Manufacturer: XILINX 
Jan 16 11:06:04 WZLap mtp-probe: checking bus 4, device 15: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.4"
Jan 16 11:06:04 WZLap mtp-probe: bus: 4, device: 15 was not an MTP device
Jan 16 11:06:07 WZLap kernel: [ 2352.349904] usb 4-1.3.4: USB disconnect, device number 15
Jan 16 11:06:09 WZLap kernel: [ 2354.082288] usb 4-1.3.4: new high speed USB device number 16 using ehci_hcd
Jan 16 11:06:09 WZLap kernel: [ 2354.174751] usb 4-1.3.4: New USB device found, idVendor=03fd, idProduct=0008
Jan 16 11:06:09 WZLap kernel: [ 2354.174759] usb 4-1.3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 16 11:06:09 WZLap kernel: [ 2354.174764] usb 4-1.3.4: Product: XILINX    
Jan 16 11:06:09 WZLap kernel: [ 2354.174768] usb 4-1.3.4: Manufacturer: XILINX 
Jan 16 11:06:09 WZLap mtp-probe: checking bus 4, device 16: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.4"
Jan 16 11:06:09 WZLap mtp-probe: bus: 4, device: 16 was not an MTP device
Jan 16 11:06:10 WZLap kernel: [ 2354.989103] usb 4-1.3.4: reset high speed USB device number 16 using ehci_hcd
Jan 16 11:06:16 WZLap kernel: [ 2361.005244] usb 4-1.3.4: reset high speed USB device number 16 using ehci_hcd
Jan 16 11:06:16 WZLap kernel: [ 2361.164185] usb 4-1.3.4: usbfs: process 4529 (_impact4) did not claim interface 0 before use
Jan 16 11:06:27 WZLap kernel: [ 2372.036445] usb 4-1.3.4: USB disconnect, device number 16
Jan 16 11:06:29 WZLap kernel: [ 2374.024496] usb 4-1.3.4: new high speed USB device number 17 using ehci_hcd
Jan 16 11:06:29 WZLap mtp-probe: checking bus 4, device 17: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.4"
Jan 16 11:06:29 WZLap kernel: [ 2374.116248] usb 4-1.3.4: New USB device found, idVendor=03fd, idProduct=0013
Jan 16 11:06:29 WZLap kernel: [ 2374.116253] usb 4-1.3.4: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Jan 16 11:06:29 WZLap mtp-probe: bus: 4, device: 17 was not an MTP device
Jan 16 11:06:29 WZLap kernel: [ 2374.337329] usb 4-1.3.4: USB disconnect, device number 17
Jan 16 11:06:31 WZLap kernel: [ 2376.069840] usb 4-1.3.4: new full speed USB device number 18 using ehci_hcd
Jan 16 11:06:31 WZLap kernel: [ 2376.161707] usb 4-1.3.4: not running at top speed; connect to a high speed hub
Jan 16 11:06:31 WZLap kernel: [ 2376.163043] usb 4-1.3.4: New USB device found, idVendor=03fd, idProduct=0008
Jan 16 11:06:31 WZLap kernel: [ 2376.163048] usb 4-1.3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 16 11:06:31 WZLap kernel: [ 2376.163051] usb 4-1.3.4: Product: XILINX    
Jan 16 11:06:31 WZLap kernel: [ 2376.163053] usb 4-1.3.4: Manufacturer: XILINX 
Jan 16 11:06:31 WZLap mtp-probe: checking bus 4, device 18: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.4"
Jan 16 11:06:31 WZLap mtp-probe: bus: 4, device: 18 was not an MTP device
Jan 16 11:06:34 WZLap kernel: [ 2378.939350] usb 4-1.3.4: USB disconnect, device number 18
Jan 16 11:06:35 WZLap kernel: [ 2380.671982] usb 4-1.3.4: new high speed USB device number 19 using ehci_hcd
Jan 16 11:06:35 WZLap kernel: [ 2380.764354] usb 4-1.3.4: New USB device found, idVendor=03fd, idProduct=0008
Jan 16 11:06:35 WZLap kernel: [ 2380.764359] usb 4-1.3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 16 11:06:35 WZLap kernel: [ 2380.764363] usb 4-1.3.4: Product: XILINX    
Jan 16 11:06:35 WZLap kernel: [ 2380.764365] usb 4-1.3.4: Manufacturer: XILINX 
Jan 16 11:06:35 WZLap mtp-probe: checking bus 4, device 19: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.4"
Jan 16 11:06:35 WZLap mtp-probe: bus: 4, device: 19 was not an MTP device
Jan 16 11:06:42 WZLap kernel: [ 2387.575012] usb 4-1.3.2: new high speed USB device number 20 using ehci_hcd
Jan 16 11:06:42 WZLap kernel: [ 2387.667133] usb 4-1.3.2: New USB device found, idVendor=0403, idProduct=6010
Jan 16 11:06:42 WZLap kernel: [ 2387.667139] usb 4-1.3.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 16 11:06:42 WZLap kernel: [ 2387.667142] usb 4-1.3.2: Product: Dual RS232-HS
Jan 16 11:06:42 WZLap kernel: [ 2387.667144] usb 4-1.3.2: Manufacturer: FTDI
Jan 16 11:06:42 WZLap kernel: [ 2387.667555] ftdi_sio 4-1.3.2:1.0: FTDI USB Serial Device converter detected
Jan 16 11:06:42 WZLap kernel: [ 2387.667595] usb 4-1.3.2: Detected FT2232H
Jan 16 11:06:42 WZLap kernel: [ 2387.667597] usb 4-1.3.2: Number of endpoints 2
Jan 16 11:06:42 WZLap kernel: [ 2387.667599] usb 4-1.3.2: Endpoint 1 MaxPacketSize 512
Jan 16 11:06:42 WZLap kernel: [ 2387.667602] usb 4-1.3.2: Endpoint 2 MaxPacketSize 512
Jan 16 11:06:42 WZLap kernel: [ 2387.667604] usb 4-1.3.2: Setting MaxPacketSize 512
Jan 16 11:06:42 WZLap kernel: [ 2387.667946] usb 4-1.3.2: FTDI USB Serial Device converter now attached to ttyUSB0
Jan 16 11:06:42 WZLap kernel: [ 2387.668147] ftdi_sio 4-1.3.2:1.1: FTDI USB Serial Device converter detected
Jan 16 11:06:42 WZLap kernel: [ 2387.668180] usb 4-1.3.2: Detected FT2232H
Jan 16 11:06:42 WZLap kernel: [ 2387.668182] usb 4-1.3.2: Number of endpoints 2
Jan 16 11:06:42 WZLap kernel: [ 2387.668184] usb 4-1.3.2: Endpoint 1 MaxPacketSize 512
Jan 16 11:06:42 WZLap kernel: [ 2387.668187] usb 4-1.3.2: Endpoint 2 MaxPacketSize 512
Jan 16 11:06:42 WZLap kernel: [ 2387.668189] usb 4-1.3.2: Setting MaxPacketSize 512
Jan 16 11:06:42 WZLap kernel: [ 2387.668547] usb 4-1.3.2: FTDI USB Serial Device converter now attached to ttyUSB1
Jan 16 11:06:42 WZLap mtp-probe: checking bus 4, device 20: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.2"
Jan 16 11:06:42 WZLap mtp-probe: bus: 4, device: 20 was not an MTP device
Jan 16 11:06:48 WZLap kernel: [ 2392.880138] usb 4-1.3.4: reset high speed USB device number 19 using ehci_hcd
Jan 16 11:06:48 WZLap kernel: [ 2393.040873] usb 4-1.3.4: usbfs: process 4529 (_impact4) did not claim interface 0 before use
Jan 16 11:07:17 WZLap kernel: [ 2422.147073] usb 4-1.3.2: USB disconnect, device number 20
Jan 16 11:07:17 WZLap kernel: [ 2422.147242] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
Jan 16 11:07:17 WZLap kernel: [ 2422.147261] ftdi_sio 4-1.3.2:1.0: device disconnected
Jan 16 11:07:17 WZLap kernel: [ 2422.147380] ftdi_sio ttyUSB1: FTDI USB Serial Device converter now disconnected from ttyUSB1
Jan 16 11:07:17 WZLap kernel: [ 2422.147395] ftdi_sio 4-1.3.2:1.1: device disconnected
Jan 16 11:08:25 WZLap kernel: [ 2490.514061] usb 4-1.3.4: reset high speed USB device number 19 using ehci_hcd
Jan 16 11:08:25 WZLap kernel: [ 2490.605455] usb 4-1.3.4: device firmware changed
Jan 16 11:08:25 WZLap kernel: [ 2490.606942] usb 4-1.3.4: USB disconnect, device number 19
Jan 16 11:08:25 WZLap kernel: [ 2490.681767] usb 4-1.3.4: new high speed USB device number 21 using ehci_hcd
Jan 16 11:08:26 WZLap kernel: [ 2490.774495] usb 4-1.3.4: New USB device found, idVendor=0547, idProduct=1002
Jan 16 11:08:26 WZLap kernel: [ 2490.774501] usb 4-1.3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 16 11:08:26 WZLap kernel: [ 2490.774504] usb 4-1.3.4: Product: EZ-USB FX2
Jan 16 11:08:26 WZLap kernel: [ 2490.774506] usb 4-1.3.4: Manufacturer: Cypress
Jan 16 11:08:26 WZLap mtp-probe: checking bus 4, device 21: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.4"
Jan 16 11:08:26 WZLap mtp-probe: bus: 4, device: 21 was not an MTP device
Jan 16 11:11:10 WZLap kernel: [ 2654.804851] usb 4-1.3.4: USB disconnect, device number 21
Jan 16 11:11:13 WZLap kernel: [ 2657.562151] usb 4-1.3.4: new high speed USB device number 22 using ehci_hcd
Jan 16 11:11:13 WZLap mtp-probe: checking bus 4, device 22: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.4"
Jan 16 11:11:13 WZLap kernel: [ 2657.653779] usb 4-1.3.4: New USB device found, idVendor=03fd, idProduct=0013
Jan 16 11:11:13 WZLap kernel: [ 2657.653785] usb 4-1.3.4: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Jan 16 11:11:13 WZLap mtp-probe: bus: 4, device: 22 was not an MTP device
Jan 16 11:11:13 WZLap kernel: [ 2657.872862] usb 4-1.3.4: USB disconnect, device number 22
Jan 16 11:11:15 WZLap kernel: [ 2659.607494] usb 4-1.3.4: new full speed USB device number 23 using ehci_hcd
Jan 16 11:11:15 WZLap kernel: [ 2659.699237] usb 4-1.3.4: not running at top speed; connect to a high speed hub
Jan 16 11:11:15 WZLap kernel: [ 2659.700486] usb 4-1.3.4: New USB device found, idVendor=03fd, idProduct=0008
Jan 16 11:11:15 WZLap kernel: [ 2659.700492] usb 4-1.3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 16 11:11:15 WZLap kernel: [ 2659.700495] usb 4-1.3.4: Product: XILINX    
Jan 16 11:11:15 WZLap kernel: [ 2659.700497] usb 4-1.3.4: Manufacturer: XILINX 
Jan 16 11:11:15 WZLap mtp-probe: checking bus 4, device 23: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3/4-1.3.4"
Jan 16 11:11:15 WZLap mtp-probe: bus: 4, device: 23 was not an MTP device
Jan 16 11:11:15 WZLap kernel: [ 2660.173874] usb 4-1.3.4: USB disconnect, device number 23
Jan 16 11:11:18 WZLap kernel: [ 2663.138309] usb 1-2: new high speed USB device number 2 using xhci_hcd
Jan 16 11:11:18 WZLap kernel: [ 2663.156011] usb 1-2: New USB device found, idVendor=03fd, idProduct=0013
Jan 16 11:11:18 WZLap kernel: [ 2663.156016] usb 1-2: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Jan 16 11:11:18 WZLap mtp-probe: checking bus 1, device 2: "/sys/devices/pci0000:00/0000:00:1c.2/0000:03:00.0/usb1/1-2"
Jan 16 11:11:18 WZLap mtp-probe: bus: 1, device: 2 was not an MTP device
Jan 16 11:11:18 WZLap kernel: [ 2663.274459] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint
Jan 16 11:11:18 WZLap kernel: [ 2663.331011] usb 1-2: USB disconnect, device number 2
Jan 16 11:11:20 WZLap kernel: [ 2665.095779] usb 1-2: new full speed USB device number 3 using xhci_hcd
Jan 16 11:11:20 WZLap kernel: [ 2665.120786] usb 1-2: not running at top speed; connect to a high speed hub
Jan 16 11:11:20 WZLap kernel: [ 2665.128763] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
Jan 16 11:11:20 WZLap kernel: [ 2665.131737] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
Jan 16 11:11:20 WZLap kernel: [ 2665.134741] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
Jan 16 11:11:20 WZLap kernel: [ 2665.135739] usb 1-2: New USB device found, idVendor=03fd, idProduct=0008
Jan 16 11:11:20 WZLap kernel: [ 2665.135746] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 16 11:11:20 WZLap kernel: [ 2665.135750] usb 1-2: Product: XILINX    
Jan 16 11:11:20 WZLap kernel: [ 2665.135753] usb 1-2: Manufacturer: XILINX 
Jan 16 11:11:20 WZLap mtp-probe: checking bus 1, device 3: "/sys/devices/pci0000:00/0000:00:1c.2/0000:03:00.0/usb1/1-2"
Jan 16 11:11:20 WZLap mtp-probe: bus: 1, device: 3 was not an MTP device
Jan 16 11:11:23 WZLap kernel: [ 2667.755365] usb 1-2: USB disconnect, device number 3
Jan 16 11:11:25 WZLap kernel: [ 2669.518075] usb 1-2: new high speed USB device number 4 using xhci_hcd
Jan 16 11:11:25 WZLap kernel: [ 2669.535827] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
Jan 16 11:11:25 WZLap kernel: [ 2669.536201] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
Jan 16 11:11:25 WZLap kernel: [ 2669.536575] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
Jan 16 11:11:25 WZLap kernel: [ 2669.536714] usb 1-2: New USB device found, idVendor=03fd, idProduct=0008
Jan 16 11:11:25 WZLap kernel: [ 2669.536719] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Jan 16 11:11:25 WZLap kernel: [ 2669.536723] usb 1-2: Product: XILINX    
Jan 16 11:11:25 WZLap kernel: [ 2669.536725] usb 1-2: Manufacturer: XILINX 
Jan 16 11:11:25 WZLap mtp-probe: checking bus 1, device 4: "/sys/devices/pci0000:00/0000:00:1c.2/0000:03:00.0/usb1/1-2"
Jan 16 11:11:25 WZLap mtp-probe: bus: 1, device: 4 was not an MTP device
Jan 16 11:12:09 WZLap kernel: [ 2713.781432] usb 1-2: reset high speed USB device number 4 using xhci_hcd
Jan 16 11:12:09 WZLap kernel: [ 2713.797931] xhci_hcd 0000:03:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801e06274c0
Jan 16 11:12:09 WZLap kernel: [ 2713.797937] xhci_hcd 0000:03:00.0: xHCI xhci_drop_endpoint called with disabled ep ffff8801e0627500
Jan 16 11:12:09 WZLap kernel: [ 2713.900904] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint
Jan 16 11:19:13 WZLap kernel: [ 3137.415378] usb 1-2: USB disconnect, device number 4
Jan 16 11:19:17 WZLap kernel: [ 3141.116612] usb 1-2: new high speed USB device number 5 using xhci_hcd
Jan 16 11:19:17 WZLap kernel: [ 3141.134394] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
Jan 16 11:19:17 WZLap kernel: [ 3141.134892] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
Jan 16 11:19:17 WZLap kernel: [ 3141.135393] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
Jan 16 11:19:17 WZLap kernel: [ 3141.136613] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
Jan 16 11:19:17 WZLap kernel: [ 3141.136788] usb 1-2: New USB device found, idVendor=0403, idProduct=6010
Jan 16 11:19:17 WZLap kernel: [ 3141.136793] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Jan 16 11:19:17 WZLap kernel: [ 3141.136796] usb 1-2: SerialNumber: FTV6ID2D
Jan 16 11:19:17 WZLap kernel: [ 3141.138125] xhci_hcd 0000:03:00.0: WARN: short transfer on control ep
Jan 16 11:19:17 WZLap kernel: [ 3141.138463] PGD 0 
Jan 16 11:19:17 WZLap kernel: [ 3141.138523] CPU 0 
Jan 16 11:19:17 WZLap kernel: [ 3141.138543] Modules linked in: isofs ftdi_sio usbserial hidp hid acpi_cpufreq mperf tun cpufreq_conservative cpufreq_userspace cpufreq_stats cpufreq_powersave ipx p8023 parport_pc ppdev lp parport rfcomm bnep binfmt_misc uinput fuse nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc ip6table_filter ip6_tables nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack xt_tcpudp xt_owner iptable_filter ip_tables x_tables loop sha256_generic cbc dm_crypt kvm_intel kvm snd_hda_codec_realtek joydev arc4 uvcvideo nouveau videodev snd_hda_intel i915 snd_hda_codec snd_hwdep snd_pcm_oss ttm snd_mixer_oss drm_kms_helper media snd_pcm iwlagn cryptd v4l2_compat_ioctl32 psmouse drm snd_seq_midi snd_rawmidi snd_seq_midi_event aes_x86_64 aes_generic snd_seq mac80211 snd_timer snd_seq_device ecb mxm_wmi dell_laptop iTCO_wdt dell_wmi btusb i2c_algo_bit cfg80211 bluetooth snd iTCO_vendor_support rfkill sparse_keymap i2c_i801 serio_raw evdev i2c_core pcspkr battery ac wmi intel_agp intel_gtt agpgart vi
Jan 16 11:19:17 WZLap kernel: deo dcdbas processor power_supply soundcore snd_page_alloc button ext4 mbcache jbd2 crc16 dm_mod ums_realtek usb_storage uas sr_mod sd_mod cdrom crc_t10dif ehci_hcd ahci libahci r8169 libata mii thermal scsi_mod thermal_sys xhci_hcd usbcore [last unloaded: scsi_wait_scan]
Jan 16 11:19:17 WZLap kernel: [ 3141.139867] 
Jan 16 11:19:17 WZLap kernel: [ 3141.139884] Pid: 139, comm: khubd Not tainted 3.1.6 #1 Dell Inc.          Dell System Vostro 3750/0VP036
Jan 16 11:19:17 WZLap kernel: [ 3141.139979] RIP: 0010:[<ffffffff8119e088>]  [<ffffffff8119e088>] strcmp+0x2/0x1a
Jan 16 11:19:17 WZLap kernel: [ 3141.140052] RSP: 0018:ffff88022fb598c8  EFLAGS: 00010246
Jan 16 11:19:17 WZLap kernel: [ 3141.140101] RAX: 0000000000000000 RBX: ffff88021515f800 RCX: 0000000060106010
Jan 16 11:19:17 WZLap kernel: [ 3141.140167] RDX: 0000000000000000 RSI: ffffffffa07620f3 RDI: 0000000000000000
Jan 16 11:19:17 WZLap kernel: [ 3141.140233] RBP: ffff8801ffb68000 R08: ffff8801ffb68000 R09: ffff8802167d1c30
Jan 16 11:19:17 WZLap kernel: [ 3141.140299] R10: ffff8802167d1c30 R11: ffff8802167d1c30 R12: ffff8801ffb68088
Jan 16 11:19:17 WZLap kernel: [ 3141.140364] R13: ffffffffa0763288 R14: ffff8802167d1c00 R15: ffff8802167d1c00
Jan 16 11:19:17 WZLap kernel: [ 3141.140431] FS:  0000000000000000(0000) GS:ffff88023fa00000(0000) knlGS:0000000000000000
Jan 16 11:19:17 WZLap kernel: [ 3141.140506] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Jan 16 11:19:17 WZLap kernel: [ 3141.140559] CR2: 0000000000000000 CR3: 0000000001605000 CR4: 00000000000406f0
Jan 16 11:19:17 WZLap kernel: [ 3141.140624] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Jan 16 11:19:17 WZLap kernel: [ 3141.140691] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Jan 16 11:19:17 WZLap kernel: [ 3141.140757] Process khubd (pid: 139, threadinfo ffff88022fb58000, task ffff88022fc6e080)
Jan 16 11:19:17 WZLap kernel: [ 3141.140850]  ffffffffa075f30c ffffffffa0763288 ffff88021515f800 ffffffffa0763288
Jan 16 11:19:17 WZLap kernel: [ 3141.140929]  ffffffffa075f095 0000000060106010 ffff88021515f800 ffffffffa0766c80
Jan 16 11:19:17 WZLap kernel: [ 3141.141006]  ffffffffa0742459 0000000000000001 ffffffff81199071 ffff880200000001
Jan 16 11:19:17 WZLap kernel: [ 3141.141112]  [<ffffffffa075f30c>] ? ftdi_8u2232c_probe+0x41/0x56 [ftdi_sio]
Jan 16 11:19:17 WZLap kernel: [ 3141.141178]  [<ffffffffa075f095>] ? ftdi_sio_probe+0x1c/0x31 [ftdi_sio]
Jan 16 11:19:17 WZLap kernel: [ 3141.141242]  [<ffffffffa0742459>] ? usb_serial_probe+0x182/0xe09 [usbserial]
Jan 16 11:19:17 WZLap kernel: [ 3141.141310]  [<ffffffff81199071>] ? idr_get_empty_slot+0x17b/0x267
Jan 16 11:19:17 WZLap kernel: [ 3141.141369]  [<ffffffff81199251>] ? ida_get_new_above+0xf4/0x198
Jan 16 11:19:17 WZLap kernel: [ 3141.141428]  [<ffffffff81146aca>] ? sysfs_find_dirent+0x2f/0x44
Jan 16 11:19:17 WZLap kernel: [ 3141.141485]  [<ffffffff81146a0b>] ? sysfs_addrm_finish+0x26/0xb6
Jan 16 11:19:17 WZLap kernel: [ 3141.141545]  [<ffffffff8106fdc1>] ? arch_local_irq_save+0x11/0x17
Jan 16 11:19:17 WZLap kernel: [ 3141.141603]  [<ffffffff81324734>] ? _raw_spin_lock_irqsave+0x9/0x1f
Jan 16 11:19:17 WZLap kernel: [ 3141.141664]  [<ffffffff812361ca>] ? __pm_runtime_set_status+0x10a/0x12e
Jan 16 11:19:17 WZLap kernel: [ 3141.141727]  [<ffffffff8106fdc1>] ? arch_local_irq_save+0x11/0x17
Jan 16 11:19:17 WZLap kernel: [ 3141.141796]  [<ffffffffa000a332>] ? usb_probe_interface+0xf2/0x15d [usbcore]
Jan 16 11:19:17 WZLap kernel: [ 3141.141864]  [<ffffffff8122f301>] ? driver_probe_device+0xa8/0x138
Jan 16 11:19:17 WZLap kernel: [ 3141.141922]  [<ffffffff8122f400>] ? __driver_attach+0x6f/0x6f
Jan 16 11:19:17 WZLap kernel: [ 3141.141977]  [<ffffffff8122e38f>] ? bus_for_each_drv+0x47/0x7b
Jan 16 11:19:17 WZLap kernel: [ 3141.142032]  [<ffffffff8122f222>] ? device_attach+0x6f/0x8f
Jan 16 11:19:17 WZLap kernel: [ 3141.142085]  [<ffffffff8122eb53>] ? bus_probe_device+0x1f/0x37
Jan 16 11:19:17 WZLap kernel: [ 3141.142142]  [<ffffffff8122d4fb>] ? device_add+0x3e7/0x587
Jan 16 11:19:17 WZLap kernel: [ 3141.142206]  [<ffffffffa0008fd5>] ? usb_set_configuration+0x52f/0x584 [usbcore]
Jan 16 11:19:17 WZLap kernel: [ 3141.142275]  [<ffffffff81147417>] ? sysfs_do_create_link+0x139/0x184
Jan 16 11:19:17 WZLap kernel: [ 3141.142337]  [<ffffffff81035379>] ? should_resched+0x5/0x23
Jan 16 11:19:17 WZLap kernel: [ 3141.142402]  [<ffffffffa000fcf2>] ? generic_probe+0x45/0x73 [usbcore]
Jan 16 11:19:17 WZLap kernel: [ 3141.142463]  [<ffffffff8122f301>] ? driver_probe_device+0xa8/0x138
Jan 16 11:19:17 WZLap kernel: [ 3141.142522]  [<ffffffff8122f400>] ? __driver_attach+0x6f/0x6f
Jan 16 11:19:17 WZLap kernel: [ 3141.145457]  [<ffffffff8122e38f>] ? bus_for_each_drv+0x47/0x7b
Jan 16 11:19:17 WZLap kernel: [ 3141.148365]  [<ffffffff8122f222>] ? device_attach+0x6f/0x8f
Jan 16 11:19:17 WZLap kernel: [ 3141.151264]  [<ffffffff8122eb53>] ? bus_probe_device+0x1f/0x37
Jan 16 11:19:17 WZLap kernel: [ 3141.154175]  [<ffffffff8122d4fb>] ? device_add+0x3e7/0x587
Jan 16 11:19:17 WZLap kernel: [ 3141.157093]  [<ffffffff8122ca6a>] ? dev_printk+0x48/0x4d
Jan 16 11:19:17 WZLap kernel: [ 3141.159910]  [<ffffffffa0002fab>] ? usb_new_device+0x124/0x198 [usbcore]
Jan 16 11:19:17 WZLap kernel: [ 3141.162630]  [<ffffffffa0004034>] ? hub_thread+0x9d7/0xec6 [usbcore]
Jan 16 11:19:17 WZLap kernel: [ 3141.165224]  [<ffffffff81036db1>] ? set_next_entity+0x32/0x52
Jan 16 11:19:17 WZLap kernel: [ 3141.167701]  [<ffffffff8105e94b>] ? add_wait_queue+0x3c/0x3c
Jan 16 11:19:17 WZLap kernel: [ 3141.170066]  [<ffffffffa000365d>] ? usb_remote_wakeup+0x2f/0x2f [usbcore]
Jan 16 11:19:17 WZLap kernel: [ 3141.172328]  [<ffffffff8105e30c>] ? kthread+0x76/0x7e
Jan 16 11:19:17 WZLap kernel: [ 3141.174468]  [<ffffffff8132b074>] ? kernel_thread_helper+0x4/0x10
Jan 16 11:19:17 WZLap kernel: [ 3141.176598]  [<ffffffff8105e296>] ? kthread_worker_fn+0x139/0x139
Jan 16 11:19:17 WZLap kernel: [ 3141.178689]  [<ffffffff8132b070>] ? gs_change+0x13/0x13
Jan 16 11:19:17 WZLap kernel: [ 3141.187619]  RSP <ffff88022fb598c8>
Jan 16 11:19:17 WZLap kernel: [ 3141.256253] ---[ end trace 40fcd7299ddb3488 ]---
Jan 16 11:19:57 WZLap shutdown[4870]: shutting down for system reboot
Comment 1 WZab 2012-01-25 18:31:41 UTC 
I've noticed the same problem in the newest 3.2.1 kernel.
Below are the messages for /var/log/messages:

Jan 25 14:26:03 WZLap kernel: [11375.612903] usb 2-1.3.4: new high-speed USB device number 47 using ehci_hcd
Jan 25 14:26:03 WZLap kernel: [11375.707651] usb 2-1.3.4: New USB device found, idVendor=0403, idProduct=6010
Jan 25 14:26:03 WZLap kernel: [11375.707657] usb 2-1.3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Jan 25 14:26:03 WZLap kernel: [11375.707660] usb 2-1.3.4: SerialNumber: FTV6ID2D
Jan 25 14:26:03 WZLap mtp-probe: checking bus 2, device 47: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3.4"
Jan 25 14:26:03 WZLap mtp-probe: bus: 2, device: 47 was not an MTP device
Jan 25 14:26:03 WZLap kernel: [11375.819807] usbcore: registered new interface driver usbserial
Jan 25 14:26:03 WZLap kernel: [11375.819828] USB Serial support registered for generic
Jan 25 14:26:03 WZLap kernel: [11375.819875] usbcore: registered new interface driver usbserial_generic
Jan 25 14:26:03 WZLap kernel: [11375.819877] usbserial: USB Serial Driver core
Jan 25 14:26:03 WZLap kernel: [11375.821975] USB Serial support registered for FTDI USB Serial Device
Jan 25 14:26:03 WZLap kernel: [11375.822213] PGD 22e123067 PUD 1db485067 PMD 0 
Jan 25 14:26:03 WZLap kernel: [11375.822317] CPU 7 
Jan 25 14:26:03 WZLap kernel: [11375.822336] Modules linked in: ftdi_sio(+) usbserial isofs hidp hid tun acpi_cpufreq mperf cpufreq_conservative cpufreq_userspace cpufreq_stats cpufreq_powersave ipx p8023 parport_pc ppdev lp parport rfcomm bnep binfmt_misc uinput fuse nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc ip6table_filter ip6_tables nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack xt_tcpudp xt_owner iptable_filter ip_tables x_tables loop sha256_generic cryptd aes_x86_64 aes_generic cbc dm_crypt kvm_intel kvm snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep uvcvideo nouveau videodev media snd_pcm_oss snd_mixer_oss snd_pcm v4l2_compat_ioctl32 arc4 snd_seq_midi snd_rawmidi ttm snd_seq_midi_event i915 snd_seq drm_kms_helper snd_timer snd_seq_device iwlwifi snd mac80211 btusb drm bluetooth cfg80211 intel_agp i2c_i801 dell_laptop iTCO_wdt dcdbas intel_gtt agpgart psmouse dell_wmi i2c_algo_bit sparse_keymap mxm_wmi soundcore i2c_core serio_raw evdev iTCO_vendor_support pcspkr processor batt
Jan 25 14:26:03 WZLap kernel: ery ac video button power_supply rfkill snd_page_alloc wmi ext4 mbcache jbd2 crc16 dm_mod ums_realtek usb_storage uas sr_mod sd_mod cdrom crc_t10dif xhci_hcd ahci libahci libata scsi_mod r8169 mii ehci_hcd thermal thermal_sys usbcore usb_common [last unloaded: scsi_wait_scan]
Jan 25 14:26:03 WZLap kernel: [11375.823544] 
Jan 25 14:26:03 WZLap kernel: [11375.823560] Pid: 5781, comm: modprobe Not tainted 3.2.1 #2 Dell Inc.          Dell System Vostro 3750/0VP036
Jan 25 14:26:03 WZLap kernel: [11375.823650] RIP: 0010:[<ffffffff811a4f68>]  [<ffffffff811a4f68>] strcmp+0x2/0x1a
Jan 25 14:26:03 WZLap kernel: [11375.823716] RSP: 0018:ffff8801db561be0  EFLAGS: 00010246
Jan 25 14:26:03 WZLap kernel: [11375.823762] RAX: 0000000000000000 RBX: ffff88021ec90800 RCX: 0000000060106010
Jan 25 14:26:03 WZLap kernel: [11375.823820] RDX: 0000000000000000 RSI: ffffffffa076c0f3 RDI: 0000000000000000
Jan 25 14:26:03 WZLap kernel: [11375.823879] RBP: ffff88022f9e9000 R08: ffff88022f9e9000 R09: ffff8801fe6eac40
Jan 25 14:26:03 WZLap kernel: [11375.823939] R10: ffff880200c7e430 R11: ffff880200c7e430 R12: ffff88022f9e9088
Jan 25 14:26:03 WZLap kernel: [11375.824002] R13: ffffffffa076d288 R14: ffff880200c7e400 R15: ffff880200c7e400
Jan 25 14:26:03 WZLap kernel: [11375.824062] FS:  00007f917d93b700(0000) GS:ffff88023fbc0000(0000) knlGS:0000000000000000
Jan 25 14:26:03 WZLap kernel: [11375.824130] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jan 25 14:26:03 WZLap kernel: [11375.824179] CR2: 0000000000000000 CR3: 00000001e01c2000 CR4: 00000000000406e0
Jan 25 14:26:03 WZLap kernel: [11375.824238] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Jan 25 14:26:03 WZLap kernel: [11375.824305] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Jan 25 14:26:03 WZLap kernel: [11375.824376] Process modprobe (pid: 5781, threadinfo ffff8801db560000, task ffff88023129c100)
Jan 25 14:26:03 WZLap kernel: [11375.824379]  ffffffffa076930f ffffffffa076d288 ffff88021ec90800 ffffffffa076d288
Jan 25 14:26:03 WZLap kernel: [11375.824383]  ffffffffa0769095 0000000060106010 ffff88021ec90800 ffffffffa0770c80
Jan 25 14:26:03 WZLap kernel: [11375.824387]  ffffffffa0755459 0000000000000001 ffffffff8119ff39 0000000000000001
Jan 25 14:26:03 WZLap kernel: [11375.824399]  [<ffffffffa076930f>] ? ftdi_8u2232c_probe+0x41/0x56 [ftdi_sio]
Jan 25 14:26:03 WZLap kernel: [11375.824406]  [<ffffffffa0769095>] ? ftdi_sio_probe+0x1c/0x31 [ftdi_sio]
Jan 25 14:26:03 WZLap kernel: [11375.824411]  [<ffffffffa0755459>] ? usb_serial_probe+0x182/0xe09 [usbserial]
Jan 25 14:26:03 WZLap kernel: [11375.824415]  [<ffffffff8119ff39>] ? idr_get_empty_slot+0x17b/0x267
Jan 25 14:26:03 WZLap kernel: [11375.824420]  [<ffffffff811a0119>] ? ida_get_new_above+0xf4/0x198
Jan 25 14:26:03 WZLap kernel: [11375.824424]  [<ffffffff8123e0a3>] ? rpm_resume+0x411/0x452
Jan 25 14:26:03 WZLap kernel: [11375.824429]  [<ffffffff8114ab65>] ? sysfs_link_sibling+0x8f/0xd2
Jan 25 14:26:03 WZLap kernel: [11375.824433]  [<ffffffff8114b12f>] ? sysfs_addrm_finish+0x26/0x9f
Jan 25 14:26:03 WZLap kernel: [11375.824437]  [<ffffffff8114b41a>] ? __sysfs_add_one+0x8b/0xb8
Jan 25 14:26:03 WZLap kernel: [11375.824443]  [<ffffffff8106f2e9>] ? arch_local_irq_save+0x11/0x17
Jan 25 14:26:03 WZLap kernel: [11375.824447]  [<ffffffff8132a93c>] ? _raw_spin_lock_irqsave+0x9/0x22
Jan 25 14:26:03 WZLap kernel: [11375.824450]  [<ffffffff8123e696>] ? __pm_runtime_set_status+0x117/0x13b
Jan 25 14:26:03 WZLap kernel: [11375.824454]  [<ffffffff8106f2e9>] ? arch_local_irq_save+0x11/0x17
Jan 25 14:26:03 WZLap kernel: [11375.824470]  [<ffffffffa001146d>] ? usb_probe_interface+0xf2/0x15d [usbcore]
Jan 25 14:26:03 WZLap kernel: [11375.824476]  [<ffffffff81236e95>] ? driver_probe_device+0xa8/0x138
Jan 25 14:26:03 WZLap kernel: [11375.824482]  [<ffffffff81236f74>] ? __driver_attach+0x4f/0x6f
Jan 25 14:26:03 WZLap kernel: [11375.824487]  [<ffffffff81236f25>] ? driver_probe_device+0x138/0x138
Jan 25 14:26:03 WZLap kernel: [11375.824495]  [<ffffffff812361c4>] ? bus_for_each_dev+0x44/0x78
Jan 25 14:26:03 WZLap kernel: [11375.824504]  [<ffffffff8123682c>] ? bus_add_driver+0xa2/0x1f2
Jan 25 14:26:03 WZLap kernel: [11375.824509]  [<ffffffff81237399>] ? driver_register+0x8d/0xf5
Jan 25 14:26:03 WZLap kernel: [11375.824524]  [<ffffffffa00107a3>] ? usb_register_driver+0x7d/0x13a [usbcore]
Jan 25 14:26:03 WZLap kernel: [11375.824531]  [<ffffffffa0774000>] ? 0xffffffffa0773fff
Jan 25 14:26:03 WZLap kernel: [11375.824541]  [<ffffffffa07740a6>] ? ftdi_init+0xa6/0x1000 [ftdi_sio]
Jan 25 14:26:03 WZLap kernel: [11375.824547]  [<ffffffff81002085>] ? do_one_initcall+0x75/0x12c
Jan 25 14:26:03 WZLap kernel: [11375.824554]  [<ffffffffa0774000>] ? 0xffffffffa0773fff
Jan 25 14:26:03 WZLap kernel: [11375.824558]  [<ffffffff81073a89>] ? sys_init_module+0x10c/0x25b
Jan 25 14:26:03 WZLap kernel: [11375.824564]  [<ffffffff8132f8d2>] ? system_call_fastpath+0x16/0x1b
Jan 25 14:26:03 WZLap kernel: [11375.824597]  RSP <ffff8801db561be0>
Jan 25 14:26:03 WZLap kernel: [11375.898042] ---[ end trace 9cb976635b1a0aef ]---
Comment 2 WZab 2012-02-01 13:59:50 UTC 
The problem still remains in kernel 3.2.2
Below is contents from /var/log/messages
The following messages were displayed right after I connected a FT2232H based dongle to the system. Shortly after that the system became unresponsive and I had to hard-reset it.

Feb  1 14:43:02 WZLap kernel: [ 9351.696424] usb 4-1.3: new high-speed USB device number 26 using ehci_hcd
Feb  1 14:43:02 WZLap kernel: [ 9351.784301] usb 4-1.3: New USB device found, idVendor=0403, idProduct=6010
Feb  1 14:43:02 WZLap kernel: [ 9351.784307] usb 4-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Feb  1 14:43:02 WZLap kernel: [ 9351.784310] usb 4-1.3: SerialNumber: FTV6ID2D
Feb  1 14:43:02 WZLap mtp-probe: checking bus 4, device 26: "/sys/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.3"
Feb  1 14:43:02 WZLap mtp-probe: bus: 4, device: 26 was not an MTP device
Feb  1 14:43:02 WZLap kernel: [ 9351.902786] usbcore: registered new interface driver usbserial
Feb  1 14:43:02 WZLap kernel: [ 9351.902821] USB Serial support registered for generic
Feb  1 14:43:02 WZLap kernel: [ 9351.902910] usbcore: registered new interface driver usbserial_generic
Feb  1 14:43:02 WZLap kernel: [ 9351.902917] usbserial: USB Serial Driver core
Feb  1 14:43:02 WZLap kernel: [ 9351.905254] USB Serial support registered for FTDI USB Serial Device
Feb  1 14:43:02 WZLap kernel: [ 9351.905500] PGD 1b1965067 PUD 1fdb82067 PMD 0 
Feb  1 14:43:02 WZLap kernel: [ 9351.905610] CPU 1 
Feb  1 14:43:02 WZLap kernel: [ 9351.905645] Modules linked in: ftdi_sio(+) usbserial isofs hidp hid ebtable_nat ebtables acpi_cpufreq mperf tun cpufreq_conservative cpufreq_userspace cpufreq_stats cpufreq_powersave ipx p8023 parport_pc ppdev lp parport rfcomm bnep binfmt_misc uinput fuse nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc ip6table_filter ip6_tables nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack xt_tcpudp xt_owner iptable_filter ip_tables x_tables loop sha256_generic cryptd aes_x86_64 aes_generic cbc dm_crypt kvm_intel kvm snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_midi joydev arc4 snd_rawmidi snd_seq_midi_event nouveau ttm i915 uvcvideo drm_kms_helper drm snd_seq videodev media v4l2_compat_ioctl32 intel_agp intel_gtt agpgart dell_laptop dcdbas iwlwifi iTCO_wdt i2c_i801 pcspkr i2c_algo_bit i2c_core snd_timer mxm_wmi dell_wmi iTCO_vendor_support sparse_keymap evdev btusb mac80211 snd_seq_device processor battery video psmouse(O) se
Feb  1 14:43:02 WZLap kernel: rio_raw wmi button ac snd power_supply soundcore snd_page_alloc cfg80211 bluetooth rfkill ext4 mbcache jbd2 crc16 dm_mod sr_mod sd_mod cdrom crc_t10dif ums_realtek usb_storage uas ahci libahci libata scsi_mod r8169 mii xhci_hcd ehci_hcd usbcore thermal thermal_sys usb_common [last unloaded: scsi_wait_scan]
Feb  1 14:43:02 WZLap kernel: [ 9351.906829] 
Feb  1 14:43:02 WZLap kernel: [ 9351.906845] Pid: 6263, comm: modprobe Tainted: G           O 3.2.2 #1 Dell Inc.          Dell System Vostro 3750/0VP036
Feb  1 14:43:02 WZLap kernel: [ 9351.906938] RIP: 0010:[<ffffffff811ab110>]  [<ffffffff811ab110>] strcmp+0x2/0x1a
Feb  1 14:43:02 WZLap kernel: [ 9351.907000] RSP: 0018:ffff8801cf8d7be0  EFLAGS: 00010246
Feb  1 14:43:02 WZLap kernel: [ 9351.907042] RAX: 0000000000000000 RBX: ffff8801cf8f8e40 RCX: 0000000060106010
Feb  1 14:43:02 WZLap kernel: [ 9351.907097] RDX: 0000000000000000 RSI: ffffffffa07870f3 RDI: 0000000000000000
Feb  1 14:43:02 WZLap kernel: [ 9351.907151] RBP: ffff8802311f1000 R08: ffff8802311f1000 R09: ffff8801ba906ac0
Feb  1 14:43:02 WZLap kernel: [ 9351.907205] R10: ffff8801ba906ac0 R11: ffff8801ba906ac0 R12: ffff8802311f1088
Feb  1 14:43:02 WZLap kernel: [ 9351.907259] R13: ffffffffa0788288 R14: ffff88022fbe5800 R15: ffff88022fbe5800
Feb  1 14:43:02 WZLap kernel: [ 9351.907313] FS:  00007ff0735fb700(0000) GS:ffff88023fa40000(0000) knlGS:0000000000000000
Feb  1 14:43:02 WZLap kernel: [ 9351.907375] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Feb  1 14:43:02 WZLap kernel: [ 9351.907419] CR2: 0000000000000000 CR3: 00000001dbd39000 CR4: 00000000000406e0
Feb  1 14:43:02 WZLap kernel: [ 9351.907474] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Feb  1 14:43:02 WZLap kernel: [ 9351.907528] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Feb  1 14:43:02 WZLap kernel: [ 9351.907583] Process modprobe (pid: 6263, threadinfo ffff8801cf8d6000, task ffff88023322a280)
Feb  1 14:43:02 WZLap kernel: [ 9351.907663]  ffffffffa078430f ffffffffa0788288 ffff8801cf8f8e40 ffffffffa0788288
Feb  1 14:43:02 WZLap kernel: [ 9351.907729]  ffffffffa0784095 0000000060106010 ffff8801cf8f8e40 ffffffffa078bc80
Feb  1 14:43:02 WZLap kernel: [ 9351.907795]  ffffffffa076e4bf 0000000000000001 0000000100000000 ffff88022f90bf70
Feb  1 14:43:02 WZLap kernel: [ 9351.907890]  [<ffffffffa078430f>] ? ftdi_8u2232c_probe+0x41/0x56 [ftdi_sio]
Feb  1 14:43:02 WZLap kernel: [ 9351.907952]  [<ffffffffa0784095>] ? ftdi_sio_probe+0x1c/0x31 [ftdi_sio]
Feb  1 14:43:02 WZLap kernel: [ 9351.908007]  [<ffffffffa076e4bf>] ? usb_serial_probe+0x182/0xe07 [usbserial]
Feb  1 14:43:02 WZLap kernel: [ 9351.908063]  [<ffffffff811a6161>] ? ida_get_new_above+0xf4/0x198
Feb  1 14:43:02 WZLap kernel: [ 9351.908111]  [<ffffffff81244e2e>] ? rpm_resume+0x447/0x488
Feb  1 14:43:02 WZLap kernel: [ 9351.908157]  [<ffffffff8114ff01>] ? sysfs_link_sibling+0x8f/0xd2
Feb  1 14:43:02 WZLap kernel: [ 9351.908204]  [<ffffffff811504de>] ? sysfs_addrm_finish+0x26/0x9f
Feb  1 14:43:02 WZLap kernel: [ 9351.908250]  [<ffffffff811507c9>] ? __sysfs_add_one+0x8b/0xb8
Feb  1 14:43:02 WZLap kernel: [ 9351.908298]  [<ffffffff8103dbd5>] ? get_parent_ip+0x9/0x1b
Feb  1 14:43:02 WZLap kernel: [ 9351.908342]  [<ffffffff8103dbd5>] ? get_parent_ip+0x9/0x1b
Feb  1 14:43:02 WZLap kernel: [ 9351.908386]  [<ffffffff8103dbd5>] ? get_parent_ip+0x9/0x1b
Feb  1 14:43:02 WZLap kernel: [ 9351.908432]  [<ffffffff8133677d>] ? sub_preempt_count+0x83/0x94
Feb  1 14:43:02 WZLap kernel: [ 9351.908479]  [<ffffffff8103dbd5>] ? get_parent_ip+0x9/0x1b
Feb  1 14:43:02 WZLap kernel: [ 9351.908524]  [<ffffffff81336828>] ? add_preempt_count+0x9a/0x9c
Feb  1 14:43:02 WZLap kernel: [ 9351.908571]  [<ffffffff81333b5a>] ? _raw_spin_lock_irqsave+0x1c/0x3e
Feb  1 14:43:02 WZLap kernel: [ 9351.908634]  [<ffffffffa001b44f>] ? usb_probe_interface+0xf2/0x15e [usbcore]
Feb  1 14:43:02 WZLap kernel: [ 9351.908692]  [<ffffffff8123db05>] ? driver_probe_device+0xa8/0x138
Feb  1 14:43:02 WZLap kernel: [ 9351.908741]  [<ffffffff8123dbe4>] ? __driver_attach+0x4f/0x6f
Feb  1 14:43:02 WZLap kernel: [ 9351.908787]  [<ffffffff8123db95>] ? driver_probe_device+0x138/0x138
Feb  1 14:43:02 WZLap kernel: [ 9351.908840]  [<ffffffff8123ce34>] ? bus_for_each_dev+0x44/0x78
Feb  1 14:43:02 WZLap kernel: [ 9351.908891]  [<ffffffff8123d49c>] ? bus_add_driver+0xa2/0x1f2
Feb  1 14:43:02 WZLap kernel: [ 9351.908951]  [<ffffffff8123e011>] ? driver_register+0x8d/0xf5
Feb  1 14:43:02 WZLap kernel: [ 9351.909007]  [<ffffffffa001a772>] ? usb_register_driver+0x7c/0x138 [usbcore]
Feb  1 14:43:02 WZLap kernel: [ 9351.909065]  [<ffffffffa078f000>] ? 0xffffffffa078efff
Feb  1 14:43:02 WZLap kernel: [ 9351.911513]  [<ffffffffa078f0a6>] ? ftdi_init+0xa6/0x1000 [ftdi_sio]
Feb  1 14:43:02 WZLap kernel: [ 9351.913903]  [<ffffffff81002086>] ? do_one_initcall+0x76/0x12c
Feb  1 14:43:02 WZLap kernel: [ 9351.916286]  [<ffffffffa078f000>] ? 0xffffffffa078efff
Feb  1 14:43:02 WZLap kernel: [ 9351.918661]  [<ffffffff81074d9c>] ? sys_init_module+0x10c/0x25b
Feb  1 14:43:02 WZLap kernel: [ 9351.921056]  [<ffffffff81338312>] ? system_call_fastpath+0x16/0x1b
Feb  1 14:43:02 WZLap kernel: [ 9351.930495]  RSP <ffff8801cf8d7be0>
Feb  1 14:43:02 WZLap kernel: [ 9351.996045] ---[ end trace 86e34305cdd55b80 ]---
Comment 3 WZab 2012-02-02 18:25:22 UTC 
I attach the result of the "lsusb -v" for the device which triggers the reported bug:

Bus 004 Device 004: ID 0403:6010 Future Technology Devices International, Ltd FT2232C Dual USB-UART/FIFO IC
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x0403 Future Technology Devices International, Ltd
  idProduct          0x6010 FT2232C Dual USB-UART/FIFO IC
  bcdDevice            7.00
  iManufacturer           1 
  iProduct                2 
  iSerial                 3 FTV6ID2D
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           55
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              2 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              2 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0000
  (Bus Powered)

It seems, that the problem is associated with the following part of the ftdi_sio.c driver (lines 1756-1766)

static int ftdi_8u2232c_probe(struct usb_serial *serial)
{
	struct usb_device *udev = serial->dev;

	dbg("%s", __func__);

	if (strcmp(udev->manufacturer, "CALAO Systems") == 0)
		return ftdi_jtag_probe(serial);

	return 0;
}

It seems, that the device returns empty manufacturer string. May it cause problem in call to strcmp?
Comment 4 Greg Kroah-Hartman 2012-02-22 21:04:13 UTC 
All USB bugs should be sent to the linux-usb@vger.kernel.org mailing 
list, and not entered into bugzilla.  Please bring this issue up there,
if it is still a problem in the latest kernel release.
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