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    Subject2.4.22: OOPS on disconnect PL2303 adapter - see also 2.6.0-test4 - PL2303 annoyances
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    After the troubles with 2.6, rebooted with 2.4.22, First use of USB
    with 2.4.22 ;)

    Behaviour same + an oops...

    Sorry, the call trace DOES not make sense - I checked that I use the correct symbols ;

    Regards
    Michael

    Sep 1 18:49:03 mhfl2 kernel: Linux version 2.4.22-mhf58 (root@mhfl4) (gcc version 2.95.3 20010315 (release)) #12 Mon Sep 1 18:17:25 HKT 2003

    []

    Sep 1 18:50:10 mhfl2 kernel: usb.c: registered new driver usbdevfs
    Sep 1 18:50:10 mhfl2 kernel: usb.c: registered new driver hub
    Sep 1 18:50:10 mhfl2 kernel: SCSI subsystem driver Revision: 1.00
    Sep 1 18:50:10 mhfl2 kernel: Initializing USB Mass Storage driver...
    Sep 1 18:50:10 mhfl2 kernel: usb.c: registered new driver usb-storage
    Sep 1 18:50:10 mhfl2 kernel: USB Mass Storage support registered.
    Sep 1 18:50:11 mhfl2 kernel: usb.c: registered new driver serial
    Sep 1 18:50:11 mhfl2 kernel: usbserial.c: USB Serial Driver core v1.4
    Sep 1 18:50:11 mhfl2 kernel: usbserial.c: USB Serial support registered for PL-2303
    Sep 1 18:50:11 mhfl2 kernel: pl2303.c: Prolific PL2303 USB to serial adaptor driver v0.9
    Sep 1 18:50:11 mhfl2 modprobe: modprobe: Can't locate module parport_lowlevel
    Sep 1 18:50:11 mhfl2 kernel: lp: driver loaded but no devices found
    Sep 1 18:50:24 mhfl2 kernel: usb-ohci.c: USB OHCI at membase 0xcf958000, IRQ 11
    Sep 1 18:50:24 mhfl2 kernel: usb-ohci.c: usb-00:14.0, ALi Corporation USB 1.1 Controller
    Sep 1 18:50:24 mhfl2 kernel: usb.c: new USB bus registered, assigned bus number 1
    Sep 1 18:50:24 mhfl2 kernel: Product: USB OHCI Root Hub
    Sep 1 18:50:24 mhfl2 kernel: SerialNumber: cf958000
    Sep 1 18:50:24 mhfl2 kernel: hub.c: USB hub found
    Sep 1 18:50:24 mhfl2 kernel: hub.c: 2 ports detected
    Sep 1 18:50:25 mhfl2 /sbin/hotplug: arguments (usb) env (DEVFS=/proc/bus/usb OLDPWD=/ PATH=/bin:/sbin:/usr/sbin:/usr/bin ACTION=add PWD=/etc/hotplug SHLVL=1 HOME=/ DEVICE=/proc/bus/usb/001/001 PRODUCT=0/0/0 TYPE=9/0/0 DEBUG=kernel _=/bin/env)
    Sep 1 18:50:25 mhfl2 kernel: hub.c: new USB device 00:14.0-2, assigned address 2
    Sep 1 18:50:25 mhfl2 kernel: usbserial.c: PL-2303 converter detected
    Sep 1 18:50:25 mhfl2 kernel: usbserial.c: PL-2303 converter now attached to ttyUSB0 (or usb/tts/0 for devfs)
    Sep 1 18:50:25 mhfl2 /sbin/hotplug: invoke /etc/hotplug/usb.agent ()
    Sep 1 18:50:25 mhfl2 /sbin/hotplug: arguments (usb) env (DEVFS=/proc/bus/usb OLDPWD=/ PATH=/bin:/sbin:/usr/sbin:/usr/bin ACTION=add PWD=/etc/hotplug SHLVL=1 HOME=/ DEVICE=/proc/bus/usb/001/002 INTERFACE=255/0/0 PRODUCT=67b/2303/200 TYPE=0/0/0 DEBUG=kernel _=/bin/env)
    Sep 1 18:50:25 mhfl2 /sbin/hotplug: invoke /etc/hotplug/usb.agent ()
    Sep 1 18:50:31 mhfl2 /etc/hotplug/usb.agent: Setup pl2303 for USB product 67b/2303/200
    Sep 1 18:50:32 mhfl2 /etc/hotplug/usb.agent: ... no modules for USB product 0/0/0
    Sep 1 18:53:09 mhfl2 kernel: usb.c: USB disconnect on device 00:14.0-2 address 2
    Sep 1 18:53:09 mhfl2 kernel: usbserial.c: PL-2303 converter now disconnected from ttyUSB0
    Sep 1 18:53:09 mhfl2 /sbin/hotplug: arguments (usb) env (DEVFS=/proc/bus/usb OLDPWD=/ PATH=/bin:/sbin:/usr/sbin:/usr/bin ACTION=remove PWD=/etc/hotplug SHLVL=1 HOME=/ DEVICE=/proc/bus/usb/001/002 INTERFACE=255/0/0 PRODUCT=67b/2303/200 TYPE=0/0/0 DEBUG=kernel _=/bin/env)
    Sep 1 18:53:09 mhfl2 /sbin/hotplug: invoke /etc/hotplug/usb.agent ()
    Sep 1 18:53:13 mhfl2 kernel: hub.c: new USB device 00:14.0-2, assigned address 3
    Sep 1 18:53:13 mhfl2 kernel: usbserial.c: PL-2303 converter detected
    Sep 1 18:53:13 mhfl2 kernel: usbserial.c: PL-2303 converter now attached to ttyUSB0 (or usb/tts/0 for devfs)
    Sep 1 18:53:13 mhfl2 /sbin/hotplug: arguments (usb) env (DEVFS=/proc/bus/usb OLDPWD=/ PATH=/bin:/sbin:/usr/sbin:/usr/bin ACTION=add PWD=/etc/hotplug SHLVL=1 HOME=/ DEVICE=/proc/bus/usb/001/003 INTERFACE=255/0/0 PRODUCT=67b/2303/200 TYPE=0/0/0 DEBUG=kernel _=/bin/env)
    Sep 1 18:53:13 mhfl2 /sbin/hotplug: invoke /etc/hotplug/usb.agent ()
    Sep 1 18:53:17 mhfl2 /etc/hotplug/usb.agent: Setup pl2303 for USB product 67b/2303/200
    Sep 1 18:53:39 mhfl2 kernel: usb.c: USB disconnect on device 00:14.0-2 address 3
    Sep 1 18:53:39 mhfl2 kernel: usbserial.c: PL-2303 converter now disconnected from ttyUSB0
    Sep 1 18:53:39 mhfl2 /sbin/hotplug: arguments (usb) env (DEVFS=/proc/bus/usb OLDPWD=/ PATH=/bin:/sbin:/usr/sbin:/usr/bin ACTION=remove PWD=/etc/hotplug SHLVL=1 HOME=/ DEVICE=/proc/bus/usb/001/003 INTERFACE=255/0/0 PRODUCT=67b/2303/200 TYPE=0/0/0 DEBUG=kernel _=/bin/env)
    Sep 1 18:53:39 mhfl2 /sbin/hotplug: invoke /etc/hotplug/usb.agent ()
    Sep 1 18:53:42 mhfl2 kernel: hub.c: new USB device 00:14.0-2, assigned address 4
    Sep 1 18:53:42 mhfl2 kernel: usbserial.c: PL-2303 converter detected
    Sep 1 18:53:42 mhfl2 kernel: usbserial.c: PL-2303 converter now attached to ttyUSB0 (or usb/tts/0 for devfs)
    Sep 1 18:53:42 mhfl2 /sbin/hotplug: arguments (usb) env (DEVFS=/proc/bus/usb OLDPWD=/ PATH=/bin:/sbin:/usr/sbin:/usr/bin ACTION=add PWD=/etc/hotplug SHLVL=1 HOME=/ DEVICE=/proc/bus/usb/001/004 INTERFACE=255/0/0 PRODUCT=67b/2303/200 TYPE=0/0/0 DEBUG=kernel _=/bin/env)
    Sep 1 18:53:42 mhfl2 /sbin/hotplug: invoke /etc/hotplug/usb.agent ()
    Sep 1 18:53:46 mhfl2 /etc/hotplug/usb.agent: Setup pl2303 for USB product 67b/2303/200
    Sep 1 18:54:00 mhfl2 kernel: usb.c: USB disconnect on device 00:14.0-2 address 4
    Sep 1 18:54:00 mhfl2 kernel: usbserial.c: PL-2303 converter now disconnected from ttyUSB0
    Sep 1 18:54:00 mhfl2 /sbin/hotplug: arguments (usb) env (DEVFS=/proc/bus/usb OLDPWD=/ PATH=/bin:/sbin:/usr/sbin:/usr/bin ACTION=remove PWD=/etc/hotplug SHLVL=1 HOME=/ DEVICE=/proc/bus/usb/001/004 INTERFACE=255/0/0 PRODUCT=67b/2303/200 TYPE=0/0/0 DEBUG=kernel _=/bin/env)
    Sep 1 18:54:00 mhfl2 /sbin/hotplug: invoke /etc/hotplug/usb.agent ()
    Sep 1 18:54:03 mhfl2 kernel: hub.c: new USB device 00:14.0-2, assigned address 5
    Sep 1 18:54:03 mhfl2 kernel: usbserial.c: PL-2303 converter detected
    Sep 1 18:54:03 mhfl2 kernel: usbserial.c: PL-2303 converter now attached to ttyUSB0 (or usb/tts/0 for devfs)
    Sep 1 18:54:03 mhfl2 /sbin/hotplug: arguments (usb) env (DEVFS=/proc/bus/usb OLDPWD=/ PATH=/bin:/sbin:/usr/sbin:/usr/bin ACTION=add PWD=/etc/hotplug SHLVL=1 HOME=/ DEVICE=/proc/bus/usb/001/005 INTERFACE=255/0/0 PRODUCT=67b/2303/200 TYPE=0/0/0 DEBUG=kernel _=/bin/env)
    Sep 1 18:54:03 mhfl2 /sbin/hotplug: invoke /etc/hotplug/usb.agent ()
    Sep 1 18:54:07 mhfl2 /etc/hotplug/usb.agent: Setup pl2303 for USB product 67b/2303/200
    Sep 1 18:54:10 mhfl2 kernel: usb.c: USB disconnect on device 00:14.0-2 address 5
    Sep 1 18:54:10 mhfl2 kernel: Unable to handle kernel NULL pointer dereference at virtual address 000009a4
    Sep 1 18:54:10 mhfl2 kernel: printing eip:
    Sep 1 18:54:10 mhfl2 kernel: cf944de4
    Sep 1 18:54:10 mhfl2 kernel: *pde = 00000000
    Sep 1 18:54:10 mhfl2 kernel: Oops: 0002
    Sep 1 18:54:10 mhfl2 kernel: CPU: 0
    Sep 1 18:54:10 mhfl2 kernel: EIP: 1010:[<cf944de4>] Not tainted
    Sep 1 18:54:10 mhfl2 kernel: EFLAGS: 00010246
    Sep 1 18:54:10 mhfl2 kernel: eax: 00000000 ebx: cc96541c ecx: cb783efc edx: 00000286
    Sep 1 18:54:10 mhfl2 kernel: esi: 00000001 edi: cc965400 ebp: 00000000 esp: cb783f38
    Sep 1 18:54:10 mhfl2 kernel: ds: 1018 es: 1018 ss: 1018
    Sep 1 18:54:10 mhfl2 kernel: Process khubd (pid: 2440, stackpage=cb783000)
    Sep 1 18:54:10 mhfl2 kernel: Stack: cf945fc0 cb057fc0 cf945fe0 cf8fb0ba ca743000 cc965400 00000002 00000100
    Sep 1 18:54:10 mhfl2 kernel: cdadde00 00000002 00000000 ca743000 cf8fd7d4 cdaddf14 00000002 00000001
    Sep 1 18:54:10 mhfl2 kernel: cdadde00 cb6a62c0 00000004 cdaddf10 c0306443 00003246 0000000a cf8fdb06
    Sep 1 18:54:10 mhfl2 kernel: Call Trace: [<cf945fc0>] [<cf945fe0>] [<cf8fb0ba>] [<cf8fd7d4>] [<cf8fdb06>]
    Sep 1 18:54:10 mhfl2 kernel: [<cf905f20>] [<cf8fdcac>] [<c01066c0>]
    Sep 1 18:54:10 mhfl2 kernel:
    Sep 1 18:54:10 mhfl2 kernel: Code: c7 80 a4 09 00 00 00 00 00 00 8d 4b 5c ff 43 5c 0f 8e a0 03
    Sep 1 18:55:45 mhfl2 kernel: <7>usb-storage: usb_stor_exit() called
    Sep 1 18:55:45 mhfl2 kernel: usb.c: deregistering driver usb-storage
    Sep 1 18:55:45 mhfl2 kernel: usbserial.c: USB Serial deregistering driver PL-2303

    [mhf@mhfl2 01:30:54 mhf]$ oops
    ksymoops 2.4.5 on i686 2.6.0-test4-mhf60. Options used
    -V (default)
    -k /proc/ksyms (default)
    -l /proc/modules (default)
    -o /lib/modules/2.4.22-mhf58 (specified)
    -m /boot/System.map-2.4.22-mhf58 (specified)

    Error (regular_file): read_ksyms stat /proc/ksyms failed
    ksymoops: No such file or directory
    No modules in ksyms, skipping objects
    No ksyms, skipping lsmod
    Sep 1 18:54:10 mhfl2 kernel: Unable to handle kernel NULL pointer dereference at virtual address 000009a4
    Sep 1 18:54:10 mhfl2 kernel: cf944de4
    Sep 1 18:54:10 mhfl2 kernel: *pde = 00000000
    Sep 1 18:54:10 mhfl2 kernel: Oops: 0002
    Sep 1 18:54:10 mhfl2 kernel: CPU: 0
    Sep 1 18:54:10 mhfl2 kernel: EIP: 1010:[<cf944de4>] Not tainted
    Using defaults from ksymoops -t elf32-i386 -a i386
    Sep 1 18:54:10 mhfl2 kernel: EFLAGS: 00010246
    Sep 1 18:54:10 mhfl2 kernel: eax: 00000000 ebx: cc96541c ecx: cb783efc edx: 00000286
    Sep 1 18:54:10 mhfl2 kernel: esi: 00000001 edi: cc965400 ebp: 00000000 esp: cb783f38
    Sep 1 18:54:10 mhfl2 kernel: ds: 1018 es: 1018 ss: 1018
    Sep 1 18:54:10 mhfl2 kernel: Process khubd (pid: 2440, stackpage=cb783000)
    Sep 1 18:54:10 mhfl2 kernel: Stack: cf945fc0 cb057fc0 cf945fe0 cf8fb0ba ca743000 cc965400 00000002 00000100
    Sep 1 18:54:10 mhfl2 kernel: cdadde00 00000002 00000000 ca743000 cf8fd7d4 cdaddf14 00000002 00000001
    Sep 1 18:54:10 mhfl2 kernel: cdadde00 cb6a62c0 00000004 cdaddf10 c0306443 00003246 0000000a cf8fdb06
    Sep 1 18:54:10 mhfl2 kernel: Call Trace: [<cf945fc0>] [<cf945fe0>] [<cf8fb0ba>] [<cf8fd7d4>] [<cf8fdb06>]
    Sep 1 18:54:10 mhfl2 kernel: [<cf905f20>] [<cf8fdcac>] [<c01066c0>]
    Sep 1 18:54:10 mhfl2 kernel: Code: c7 80 a4 09 00 00 00 00 00 00 8d 4b 5c ff 43 5c 0f 8e a0 03


    >>EIP; cf944de4 <END_OF_CODE+f5f2fcc/????> <=====

    >>ebx; cc96541c <END_OF_CODE+c613604/????>
    >>ecx; cb783efc <END_OF_CODE+b4320e4/????>
    >>edi; cc965400 <END_OF_CODE+c6135e8/????>
    >>esp; cb783f38 <END_OF_CODE+b432120/????>

    Trace; cf945fc0 <END_OF_CODE+f5f41a8/????>
    Trace; cf945fe0 <END_OF_CODE+f5f41c8/????>
    Trace; cf8fb0ba <END_OF_CODE+f5a92a2/????>
    Trace; cf8fd7d4 <END_OF_CODE+f5ab9bc/????>
    Trace; cf8fdb06 <END_OF_CODE+f5abcee/????>
    Trace; cf905f20 <END_OF_CODE+f5b4108/????>
    Trace; cf8fdcac <END_OF_CODE+f5abe94/????>
    Trace; c01066c0 <arch_kernel_thread+28/38>

    Code; cf944de4 <END_OF_CODE+f5f2fcc/????>
    00000000 <_EIP>:
    Code; cf944de4 <END_OF_CODE+f5f2fcc/????> <=====
    0: c7 80 a4 09 00 00 00 movl $0x0,0x9a4(%eax) <=====
    Code; cf944deb <END_OF_CODE+f5f2fd3/????>
    7: 00 00 00
    Code; cf944dee <END_OF_CODE+f5f2fd6/????>
    a: 8d 4b 5c lea 0x5c(%ebx),%ecx
    Code; cf944df1 <END_OF_CODE+f5f2fd9/????>
    d: ff 43 5c incl 0x5c(%ebx)
    Code; cf944df4 <END_OF_CODE+f5f2fdc/????>
    10: 0f 8e a0 03 00 00 jle 3b6 <_EIP+0x3b6>

    1 error issued. Results may not be reliable.

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