Public bug reported:
I'm using a USB-to-serial cable containing an FTDI chip (FT232RL) that
uses the ftdio_sio driver, which depends on the usbserial driver. Upon
boot, the device shows up normally as /dev/ttyUSB0 and works fine.
However, if I unplug it and plug it back in again, the usbserial driver
crashes, as shown in /var/log/syslog. The device still mounts as
/dev/ttyUSB0 but when my program tries to access it, it receives no
data. Doing "rmmod ftdi_sio usbserial" and then plugging the device back
in fixes the problem.
The crash report from /var/log/syslog appears below:
Jan 22 03:29:18 tekkotsu-calliope1 kernel: [ 1426.840198] usb 2-1: new full
speed USB device using uhci_hcd and address 7
Jan 22 03:29:18 tekkotsu-calliope1 kernel: [ 1427.040438] usb 2-1:
configuration #1 chosen from 1 choice
Jan 22 03:29:18 tekkotsu-calliope1 kernel: [ 1427.047507] ftdi_sio 2-1:1.0:
FTDI USB Serial Device converter detected
Jan 22 03:29:18 tekkotsu-calliope1 kernel: [ 1427.047767] usb 2-1: Detected
FT232RL
Jan 22 03:29:18 tekkotsu-calliope1 kernel: [ 1427.047781] usb 2-1: Number of
endpoints 2
Jan 22 03:29:18 tekkotsu-calliope1 kernel: [ 1427.047793] usb 2-1: Endpoint 1
MaxPacketSize 64
Jan 22 03:29:18 tekkotsu-calliope1 kernel: [ 1427.047805] usb 2-1: Endpoint 2
MaxPacketSize 64
Jan 22 03:29:18 tekkotsu-calliope1 kernel: [ 1427.047816] usb 2-1: Setting
MaxPacketSize 64
Jan 22 03:29:18 tekkotsu-calliope1 kernel: [ 1427.048514] usb 2-1: FTDI USB
Serial Device converter now attached to ttyUSB0
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538142] ------------[ cut
here ]------------
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538180] WARNING: at
/build/buildd/linux-2.6.32/drivers/usb/serial/usb-serial.c:440
serial_unthrottle+0x8c/0x90 [usbserial]()
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538196] Hardware name: 1015PX
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538204] Modules linked in:
ftdi_sio usbserial joydev binfmt_misc ppdev snd
_hda_codec_realtek fbcon tileblit font bitblit softcursor vga16fb vgastate
snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss
snd_mixer_oss arc4 snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi
snd_seq_midi_event snd_seq ath9k snd_timer i9
15 mac80211 snd_seq_device uvcvideo ath videodev v4l1_compat drm_kms_helper snd
cfg80211 v4l2_compat_ioctl32 psmouse serio_r
aw atl1c drm led_class intel_agp i2c_algo_bit soundcore snd_page_alloc video
output lp parport ahci [last unloaded: usbserial]
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538403] Pid: 2049, comm:
tekkotsu-CREATE Not tainted 2.6.32-37-generic #81-Ubuntu
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538412] Call Trace:
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538435] [<ffffffff810665ab>]
warn_slowpath_common+0x7b/0xc0
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538449] [<ffffffff81066604>]
warn_slowpath_null+0x14/0x20
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538467] [<ffffffffa03a46ac>]
serial_unthrottle+0x8c/0x90 [usbserial]
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538483] [<ffffffff813332c9>]
tty_unthrottle+0x49/0x60
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538497] [<ffffffff81331021>]
reset_buffer_flags+0xd1/0x100
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538510] [<ffffffff8133106d>]
n_tty_flush_buffer+0x1d/0x90
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538522] [<ffffffff8133440f>]
? tty_ldisc_try+0x4f/0x60
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538535] [<ffffffff81334c37>]
tty_ldisc_flush+0x37/0x60
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538549] [<ffffffff81335eae>]
tty_port_close_end+0x2e/0x100
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538566] [<ffffffffa03a4d09>]
serial_close+0x89/0xc0 [usbserial]
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538579] [<ffffffff8132e413>]
tty_release_dev+0x163/0x5e0
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538595] [<ffffffff810fc81d>]
? free_hot_page+0x2d/0x60
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538626] [<ffffffffa00f5ba8>]
? snd_card_file_remove+0x88/0x180 [snd]
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538640] [<ffffffff8132e8ae>]
tty_release+0x1e/0x30
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538655] [<ffffffff81145e65>]
__fput+0xf5/0x210
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538668] [<ffffffff81145fa5>]
fput+0x25/0x30
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538681] [<ffffffff811420cd>]
filp_close+0x5d/0x90
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538695] [<ffffffff810686af>]
put_files_struct+0x7f/0xf0
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538709] [<ffffffff81068774>]
exit_files+0x54/0x70
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538723] [<ffffffff8106acdb>]
do_exit+0x15b/0x390
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538736] [<ffffffff8106af65>]
do_group_exit+0x55/0xd0
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538751] [<ffffffff8107b9a7>]
get_signal_to_deliver+0x1d7/0x3d0
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538768] [<ffffffff81011a25>]
do_signal+0x75/0x1c0
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538781] [<ffffffff810964f2>]
? futex_wake+0x112/0x130
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538794] [<ffffffff810989e8>]
? do_futex+0xb8/0x1b0
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538808] [<ffffffff81011bcd>]
do_notify_resume+0x5d/0x80
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538822] [<ffffffff8101247e>]
int_signal+0x12/0x17
Jan 22 03:29:36 tekkotsu-calliope1 kernel: [ 1444.538832] ---[ end trace
be32863c670c039f ]---
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-37-generic 2.6.32-37.81 [modified:
lib/modules/2.6.32-37-generic/kernel/drivers/media/video/gspca/gspca_main.ko
lib/modules/2.6.32-37-generic/kernel/drivers/media/video/gspca/gspca_ov534.ko]
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-37.81-generic 2.6.32.49+drm33.21
Uname: Linux 2.6.32-37-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: user 1206 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf7cf8000 irq 22'
Mixer name : 'Realtek ALC269'
Components : 'HDA:10ec0269,10438437,00100100'
Controls : 12
Simple ctrls : 7
Date: Sun Jan 22 03:39:00 2012
HibernationDevice: RESUME=UUID=e13006da-8ef0-40c5-b369-e6c616d36d5b
InstallationMedia: Ubuntu 10.04.3 LTS "Lucid Lynx" - Release amd64 (20110720.1)
MachineType: ASUSTeK Computer INC. 1015PX
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-37-generic
root=UUID=1c28a6c4-ece0-4791-8992-e76c83e580d8 ro quiet splash
ProcEnviron:
PATH=(custom, no username)
LANG=en_US.UTF-8
SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34.7
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
dmi.bios.date: 02/18/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1101
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1015PE
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer INC.
dmi.chassis.version: x.x
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1101:bd02/18/2011:svnASUSTeKComputerINC.:pn1015PX:pvrx.x:rvnASUSTeKComputerINC.:rn1015PE:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x:
dmi.product.name: 1015PX
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug lucid needs-upstream-testing regression-potential
usbserial
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https://bugs.launchpad.net/bugs/919925
Title:
usbserial driver crashes when FTDI device is removed and reinserted
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