[Ftdi-usb-sio-devel] Oops errors when outputting to /dev/ttyUSB?

[jbassettCorrilan <jba...@co...>]

Hello folks

I have a Zalmand VFD LCD style device with id 040b:7000.

I have compiled ftdi_sio as a module on Gentoo 2.6.27 kernel.

"modprobe ftdi_sio vendor=0x040b product=0x7000" produces this dmesg 
output, it appears the device has been configured properly with the nodes:

[  128.579883] usbcore: registered new interface driver usbserial
[  128.581490] usbserial: USB Serial support registered for generic
[  128.582308] usbserial_generic 1-2:1.0: usb_probe_interface
[  128.582323] usbserial_generic 1-2:1.0: usb_probe_interface - got id
[  128.582713] usbserial_generic 1-2:1.2: usb_probe_interface
[  128.582724] usbserial_generic 1-2:1.2: usb_probe_interface - got id
[  128.583524] usbserial_generic 5-1:1.0: usb_probe_interface
[  128.583537] usbserial_generic 5-1:1.0: usb_probe_interface - got id
[  128.583929] usbserial_generic 5-1:1.1: usb_probe_interface
[  128.583940] usbserial_generic 5-1:1.1: usb_probe_interface - got id
[  128.584405] usbcore: registered new interface driver usbserial_generic
[  128.584415] usbserial: USB Serial Driver core
[  128.597107] usbserial: USB Serial support registered for FTDI USB 
Serial Device
[  128.597453] ftdi_sio 5-1:1.0: usb_probe_interface
[  128.597476] ftdi_sio 5-1:1.0: usb_probe_interface - got id
[  128.597920] ftdi_sio 5-1:1.0: FTDI USB Serial Device converter detected
[  128.598174] ftdi_sio: Detected FT2232C
[  128.598479] usb 5-1: FTDI USB Serial Device converter now attached to 
ttyUSB0
[  128.598711] ftdi_sio 5-1:1.1: usb_probe_interface
[  128.598735] ftdi_sio 5-1:1.1: usb_probe_interface - got id
[  128.599035] ftdi_sio 5-1:1.1: FTDI USB Serial Device converter detected
[  128.599223] ftdi_sio: Detected FT2232C
[  128.599487] usb 5-1: FTDI USB Serial Device converter now attached to 
ttyUSB1
[  128.599682] usbcore: registered new interface driver ftdi_sio
[  128.599694] ftdi_sio: v1.4.3:USB FTDI Serial Converters Driver


Upon attempting to use the nodes at all (such as echo "Hello" > 
/dev/ttyUSB0 or 1) I receive the following errors in dmesg output and 
that particular console effectively locks up:

[  248.073129] ftdi_sio: ftdi_set_termios FAILED to set 
databits/stopbits/parity
[  248.074131] ftdi_sio: ftdi_set_termios urb failed to set baudrate
[  248.075130] ftdi_sio: urb failed to clear flow control
[  248.076133] ftdi_sio: update_mctrl Error from MODEM_CTRL urb: DTR 
HIGH, RTS HIGH
[  248.076151] BUG: unable to handle kernel NULL pointer dereference at 
00000028
[  248.076158] IP: [<f9230446>] :ftdi_sio:ftdi_open+0x144/0x191
[  248.076191] *pde = 00000000
[  248.076198] Oops: 0002 [#1] SMP
[  248.076213] Modules linked in: ftdi_sio usbserial i915 snd_pcm_oss 
snd_mixer_oss mt352 saa7134_alsa saa7134_dvb videobuf_dvb dvb_core 
saa7134 tuner tuner_xc2028 snd_hda_intel ir_common videodev intelfb 
snd_pcm v4l1_compat compat_ioctl32 v4l2_common snd_timer videobuf_dma_sg 
snd_page_alloc snd_hwdep videobuf_core i2c_algo_bit lirc_mceusb2 snd 
tveeprom ohci1394 lirc_dev usbhid ieee1394 soundcore
[  248.076305]
[  248.076314] Pid: 6328, comm: bash Not tainted (2.6.27-gentoo-r8 #26)
[  248.076325] EIP: 0060:[<f9230446>] EFLAGS: 00010246 CPU: 0
[  248.076342] EIP is at ftdi_open+0x144/0x191 [ftdi_sio]
[  248.076353] EAX: 00000002 EBX: f70b5000 ECX: 00000000 EDX: 00000000
[  248.076363] ESI: f71e7540 EDI: efd71000 EBP: efe23e4c ESP: efe23e34
[  248.076374]  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[  248.076385] Process bash (pid: 6328, ti=efe22000 task=efd953f0 
task.ti=efe22000)
[  248.076392] Stack: efdb5400 f70b5000 efd71000 f9239a60 efd71000 
f6c11840 efe23e6c f9227e72
[  248.076412]        f73d7f00 efdb5400 efd7104c f9227d93 f73d7f00 
0bc00001 efe23e90 c0359792
[  248.076431]        00008241 00000000 00000001 efdb5400 00000000 
f71e7f04 00000000 efe23eb0
[  248.076449] Call Trace:
[  248.076462]  [<f9227e72>] ? serial_open+0xdf/0x138 [usbserial]
[  248.076481]  [<f9227d93>] ? serial_open+0x0/0x138 [usbserial]
[  248.076498]  [<c0359792>] ? tty_open+0x167/0x2ab
[  248.076513]  [<c027c25d>] ? chrdev_open+0x11f/0x158
[  248.076527]  [<c0278509>] ? __dentry_open+0x10e/0x1fc
[  248.076539]  [<c0278616>] ? nameidata_to_filp+0x1f/0x33
[  248.076552]  [<c027c13e>] ? chrdev_open+0x0/0x158
[  248.076564]  [<c0282ffc>] ? do_filp_open+0x344/0x5ed
[  248.076577]  [<c02665b0>] ? handle_mm_fault+0x4fa/0x54e
[  248.076591]  [<c028b6fa>] ? alloc_fd+0x5c/0xd4
[  248.076603]  [<c0278327>] ? do_sys_open+0x44/0xb9
[  248.076615]  [<c02783de>] ? sys_open+0x1e/0x26
[  248.076627]  [<c02038b6>] ? syscall_call+0x7/0xb
[  248.076640]  =======================
[  248.076648] Code: 34 c7 80 66 2a fc 89 c2 89 d8 e8 92 44 34 c7 c7 46 
74 00 00 00 00 8b 5d ec 0f b6 8f 88 00 00 00 8b 97 84 00 00 00 8b 03 c1 
e1 0f <89> 5a 28 c7 42 68 5f 0a 23 f9 c1 e0 08 0d 80 00 00 c0 09 c1 89
[  248.076724] EIP: [<f9230446>] ftdi_open+0x144/0x191 [ftdi_sio] SS:ESP 
0068:efe23e34
[  248.076749] ---[ end trace 8622a1ddfc18a9dc ]---

Here is my lsmod output:

Module                  Size  Used by
ftdi_sio               44808  1
usbserial              26600  3 ftdi_sio
i915                   26112  3
snd_pcm_oss            33312  0
snd_mixer_oss          12800  1 snd_pcm_oss
mt352                   5892  2
saa7134_alsa           10432  0
saa7134_dvb            18444  32
videobuf_dvb            4740  1 saa7134_dvb
dvb_core               64896  2 saa7134_dvb,videobuf_dvb
saa7134               127444  2 saa7134_alsa,saa7134_dvb
tuner                  20936  0
tuner_xc2028           17840  4
snd_hda_intel         253324  0
ir_common              35076  1 saa7134
videodev               30336  2 saa7134,tuner
intelfb                31396  0
snd_pcm                57988  3 snd_pcm_oss,saa7134_alsa,snd_hda_intel
v4l1_compat            12548  1 videodev
compat_ioctl32          1536  1 saa7134
v4l2_common             9216  2 saa7134,tuner
snd_timer              16904  1 snd_pcm
videobuf_dma_sg        10244  3 saa7134_alsa,saa7134_dvb,saa7134
snd_page_alloc          7176  2 snd_hda_intel,snd_pcm
snd_hwdep               6532  1 snd_hda_intel
videobuf_core          14340  3 videobuf_dvb,saa7134,videobuf_dma_sg
i2c_algo_bit            5380  1 intelfb
lirc_mceusb2           12416  1
snd                    41764  7 
snd_pcm_oss,snd_mixer_oss,saa7134_alsa,snd_hda_intel,snd_pcm,snd_timer,snd_hwdep
tveeprom               11012  1 saa7134
ohci1394               25776  0
lirc_dev                9752  3 lirc_mceusb2
usbhid                 23680  0
ieee1394               67648  1 ohci1394
soundcore               5856  1 snd

And here is my lsusb output:

Bus 003 Device 002: ID 179d:0010 
Bus 003 Device 001: ID 1d6b:0001 
Bus 004 Device 001: ID 1d6b:0001 
Bus 005 Device 002: ID 040b:7000 Weltrend Semiconductor
Bus 005 Device 001: ID 1d6b:0001 
Bus 002 Device 002: ID 0c16:0001 Gyration, Inc.
Bus 002 Device 001: ID 1d6b:0001 
Bus 001 Device 004: ID 0aec:3260 Neodio Technologies Corp. 7-in-1 Card 
Reader
Bus 001 Device 003: ID 03f0:4e11 Hewlett-Packard
Bus 001 Device 001: ID 1d6b:0002 


Any finally the output of cat /proc/bus/usb/devices for the Weltrend 
device after modprobing the ftdi_sio module:

T:  Bus=05 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=12  MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=040b ProdID=7000 Rev= 0.00
S:  Manufacturer=AOpen Inc.
S:  Product=AOpen Inc.
C:* #Ifs= 2 Cfg#= 1 Atr=a0 MxPwr= 64mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=03(HID  ) Sub=00 Prot=00 Driver=ftdi_sio
E:  Ad=81(I) Atr=03(Int.) MxPS=  64 Ivl=36ms
E:  Ad=03(O) Atr=03(Int.) MxPS=  64 Ivl=10ms
I:* If#= 1 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=01 Driver=ftdi_sio
E:  Ad=82(I) Atr=03(Int.) MxPS=  64 Ivl=36ms

Does anyone know what may be the problem or of any fixes?  Any 
help/advice greatly appreciated.

Thankyou

Jason