Some icky stuff happened while I was testing owfs for how it responds
when a OneWire sensor is shorted (DQ to ground).
In my case, the sensor is two DS2409 switches below the OneWire net
root. The adapter is a standard DS2480B which is accessed through a USB
to Serial adapter.
I tried to start owserver in the shorted condition. This mayhem followed.
Should this be reported to the USB maintainer or other?
site135:/# service owserver status
owserver is not running
site135:/# /var/tmp/owserver.start.sh &
[3] 18764
site135:/# DEBUG: ow_daemon.c:EnterBackground(166) main thread id
= 1074667520
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(75) Avahi support:
libavahi-client loaded successfully
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(77) Avahi library
function found: avahi_client_errno
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(78) Avahi library
function found: avahi_client_free
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(79) Avahi library
function found: avahi_client_new
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(80) Avahi library
function found: avahi_client_get_domain_name
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(81) Avahi library
function found: avahi_entry_group_add_service
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(82) Avahi library
function found: avahi_entry_group_commit
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(83) Avahi library
function found: avahi_entry_group_is_empty
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(84) Avahi library
function found: avahi_entry_group_new
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(85) Avahi library
function found: avahi_entry_group_reset
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(87) Avahi library
function found: avahi_service_resolver_free
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(88) Avahi library
function found: avahi_service_resolver_new
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(89) Avahi library
function found: avahi_service_browser_free
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(90) Avahi library
function found: avahi_service_browser_new
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(102) Avahi support:
libavahi-common loaded successfully.
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(104) Avahi library
function found: avahi_simple_poll_free
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(105) Avahi library
function found: avahi_simple_poll_get
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(106) Avahi library
function found: avahi_simple_poll_loop
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(107) Avahi library
function found: avahi_simple_poll_new
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(108) Avahi library
function found: avahi_simple_poll_quit
DEBUG: ow_avahi_link.c:OW_Load_avahi_library(109) Avahi library
function found: avahi_strerror
CALL: ow_parsename.c:FS_ParsedName_anywhere(95) path=[]
DEBUG: owlib.c:SetupTemperatureLimits(79) Globals temp limits 0C
100C (for simulated adapters)
DEBUG: ow_ds9097U.c:DS2480_initialize_repeatedly(267) Attempt #0
to initialize the DS9097U
*{went boom here: but no stacktrace}*
site135:/# service owserver status
owserver is not running
*
{I then removed the adapter from the USB port. Boom Boom. It looks
like something was still trying to access it. Not owfs afaik...}*
site135:/# usb 1-1: USB disconnect, address 2
ftdi_sio ttyUSB0: usb_serial_generic_submit_read_urb - error
submitting urb: -19
ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected
from ttyUSB0
ftdi_sio 1-1:1.0: device disconnected
usb-serial ttyUSB0: ftdi_set_termios FAILED to set
databits/stopbits/parity
Unable to handle kernel NULL pointer dereference at virtual address
00000000
pgd = c1624000
[00000000] *pgd=21a90831, *pte=00000000, *ppte=00000000
Internal error: Oops: 817 [#1]
last sysfs file: /sys/devices/platform/leds-gpio/leds/user_led/trigger
Modules linked in: fuse ipv6 ftdi_sio usbserial
CPU: 0 Not tainted (2.6.38 #2)
PC is at __mutex_lock_slowpath+0x34/0x98
LR is at mutex_lock+0x20/0x24
pc : [<c02e49c8>] lr : [<c02e4a4c>] psr: 80000013
sp : c19bfc70 ip : c19bfca8 fp : c19bfca4
r10: c1a97e40 r9 : c16c4800 r8 : c3a38af8
r7 : c3bdbe44 r6 : c3bdbe00 r5 : c1447a20 r4 : c3bdbe40
r3 : c19bfc74 r2 : 00000000 r1 : 00000000 r0 : c3bdbe40
Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
Control: 0005317f Table: 21624000 DAC: 00000015
Process owserver (pid: 18765, stack limit = 0xc19be270)
Stack: (0xc19bfc70 to 0xc19c0000)
fc60: c19bfc8c c3bdbe44 c19bfca8
c19bfc88
fc80: c01e35e4 c3bdbe40 800018b0 c3bdbe00 c399f800 c3a38af8 c19bfcb4
c19bfca8
fca0: c02e4a4c c02e49a4 c19bfd0c c19bfcb8 bf01048c c02e4a3c 00000008
0000742f
fcc0: 00000000 00000000 000003e8 c16c48e8 c19bfcec c19bfd48 c3a38a00
00000005
fce0: c19bfd2c c3a38a00 c16c4800 c19bfd48 00000000 c16c4800 c1a97e40
c1a97e6c
fd00: c19bfd2c c19bfd10 bf000a74 bf01022c c19bfd74 000008bd 00000a00
c1a97e7f
fd20: c19bfdcc c19bfd30 c01cbaa0 bf000a20 c01cd660 00000000 c19bfd8c
00000000
fd40: c16c4828 00000000 00000005 00000004 800008bd 00000a00 7f1c0300
00030415
fd60: 1a131100 170f1200 00000016 00002580 00002580 00000005 00000004
000008bd
fd80: 00000a00 7f1c0300 00030415 1a131100 170f1200 00000016 00002580
00002580
fda0: c19bfdcc c16c4800 c16c4800 becce984 c15b2fc0 becce984 00005416
c272d4c0
fdc0: c19bfe44 c19bfdd0 c01cbee4 c01cb680 00005416 c272d4c0 c19bfdf4
c19bfde8
fde0: c00463c0 c003c310 c19bfe0c c19bfdf8 c002908c c0046380 ffffffff
00000005
fe00: 00000004 800008bd 00000a00 60000013 c15b2fc0 00000000 c15b2fc0
becce960
fe20: 00005416 c272d4c0 c16c4800 00005404 becce984 c15b2fc0 c19bfe64
c19bfe48
fe40: c01cc30c c01cbc58 c19bfe84 00005404 00005404 becce984 c19bfe84
c19bfe68
fe60: c01c9058 c01cc1b8 fffffdfd fffffdfd 00005404 c16c4800 c19bff0c
c19bfe88
fe80: c01c76a8 c01c8f80 c19bfecc c19bfe98 c0046350 c00461a8 c03ed194
c38ac800
fea0: c03bc3c0 00000000 c19bfec4 c19bfeb8 c0055b78 c00559f4 c19bfed4
c19bfec8
fec0: c0055ba0 c0055b5c c19bfee4 c19bfed8 c01cd660 c0055b8c c19bff2c
c19bfee8
fee0: c01e03d0 00000003 c272d4c0 00000003 c272d4c0 becce984 c19be000
00000000
ff00: c19bff7c c19bff10 c00accfc c01c6d2c 00000000 00000001 c03db47c
0000000a
ff20: c19bff4c c19bff30 c0045c34 c01dfd5c 00000006 00000100 00000006
00000100
ff40: c19bff84 c19bff50 c0046350 c00461a8 c19bff7c 00000003 becce984
00005404
ff60: c272d4c0 c002fe88 c19be000 00000000 c19bffa4 c19bff80 c00acdc0
c00ac818
ff80: c00463c0 00000000 becce9dc 00000003 00000000 00000036 00000000
c19bffa8
ffa0: c002fce0 c00acd90 becce9dc 00000003 00000003 00005404 becce984
00000003
ffc0: becce9dc 00000003 00000000 00000036 00000005 402c8c08 00005404
00000918
ffe0: 00000010 becce960 403b5a7c 403b5a8c 40000010 00000003 00000000
00000000
Backtrace:
[<c02e4994>] (__mutex_lock_slowpath+0x0/0x98) from [<c02e4a4c>]
(mutex_lock+0x20/0x24)
r8:c3a38af8 r7:c399f800 r6:c3bdbe00 r5:800018b0 r4:c3bdbe40
[<c02e4a2c>] (mutex_lock+0x0/0x24) from [<bf01048c>]
(ftdi_set_termios+0x270/0x49c [ftdi_sio])
[<bf01021c>] (ftdi_set_termios+0x0/0x49c [ftdi_sio]) from
[<bf000a74>] (serial_set_termios+0x64/0x88 [usbserial])
[<bf000a10>] (serial_set_termios+0x0/0x88 [usbserial]) from
[<c01cbaa0>] (set_termios+0x430/0x4c0)
r6:c1a97e7f r5:00000a00 r4:000008bd
[<c01cb670>] (set_termios+0x0/0x4c0) from [<c01cbee4>]
(tty_mode_ioctl+0x29c/0x560)
[<c01cbc48>] (tty_mode_ioctl+0x0/0x560) from [<c01cc30c>]
(n_tty_ioctl_helper+0x164/0x178)
r7:c15b2fc0 r6:becce984 r5:00005404 r4:c16c4800
[<c01cc1a8>] (n_tty_ioctl_helper+0x0/0x178) from [<c01c9058>]
(n_tty_ioctl+0xe8/0xf0)
r6:becce984 r5:00005404 r4:00005404
[<c01c8f70>] (n_tty_ioctl+0x0/0xf0) from [<c01c76a8>]
(tty_ioctl+0x98c/0xa2c)
r6:c16c4800 r5:00005404 r4:fffffdfd
[<c01c6d1c>] (tty_ioctl+0x0/0xa2c) from [<c00accfc>]
(do_vfs_ioctl+0x4f4/0x578)
[<c00ac808>] (do_vfs_ioctl+0x0/0x578) from [<c00acdc0>]
(sys_ioctl+0x40/0x64)
[<c00acd80>] (sys_ioctl+0x0/0x64) from [<c002fce0>]
(ret_fast_syscall+0x0/0x2c)
r7:00000036 r6:00000000 r5:00000003 r4:becce9dc
Code: e2807004 e5803008 e50b7030 e1a04000 (e5823000)
---[ end trace bdf4d41a0d35a1aa ]---
DEBUG: ow_tcp_read.c:tcp_read(64) attempt 1 bytes Time: 5.000000
seconds
DEBUG: ow_tcp_read.c:tcp_read(114) read: 1 - 1 = 0
CONNECT: ow_com_write.c:COM_write_once(137) [Input/output error]
Trouble writing to /dev/ttyUSB0
usb 1-1: new full speed USB device using at91_ohci and address 3
ftdi_sio 1-1:1.0: FTDI USB Serial Device converter detected
usb 1-1: Detected FT232BM
usb 1-1: Number of endpoints 2
usb 1-1: Endpoint 1 MaxPacketSize 64
usb 1-1: Endpoint 2 MaxPacketSize 64
------------------------------------------------------------------------------
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