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    Subject2.6.31.2 : error when ending apcupsd
    From
    Hi,

    With kernel 2.6.31.2 I get the following error when I ending apcupsd:

    Oct 6 21:00:46 server apcupsd[5238]: apcupsd exiting, signal 15
    Oct 6 21:00:46 server BUG: unable to handle kernel paging request at
    ffff880130a6d858
    Oct 6 21:00:46 server IP: [<ffffffff8124ba55>]
    tty_port_close_start+0xc5/0x1d0
    Oct 6 21:00:46 server PGD 1002063 PUD 14067 PMD 0
    Oct 6 21:00:46 server Oops: 0002 [#1] PREEMPT SMP
    Oct 6 21:00:46 server last sysfs file:
    /sys/devices/pci0000:00/0000:00:1f.2/host2/target2:0:0/2:0:0:0/block/sdb/size
    Oct 6 21:00:46 server CPU 2
    Oct 6 21:00:46 server Modules linked in: capifs nvidia(P) [last unloaded:
    kernelcapi]
    Oct 6 21:00:46 server Pid: 5238, comm: apcupsd Tainted: P
    2.6.31.2server
    #1 P5QL-E
    Oct 6 21:00:46 server RIP: 0010:[<ffffffff8124ba55>] [<ffffffff8124ba55>]
    tty_port_close_start+0xc5/0x1d0
    Oct 6 21:00:46 server RSP: 0018:ffff88012e3abdb8 EFLAGS: 00010046
    Oct 6 21:00:46 server RAX: ffff880130a6d858 RBX: ffff88012f90e900 RCX:
    0000000000000000
    Oct 6 21:00:46 server RDX: 0000000000001717 RSI: 0000000000000000 RDI:
    ffff88012f90e900
    Oct 6 21:00:46 server RBP: ffff88012fa6d808 R08: 0000000000000000 R09:
    0000000000000000
    Oct 6 21:00:46 server R10: 0000000000000000 R11: 0000000000000206 R12:
    ffff88012e366000
    Oct 6 21:00:46 server R13: ffff88012fa6d818 R14: 0000000000000296 R15:
    0000000000000000
    Oct 6 21:00:46 server FS: 00007ffecc5ec6f0(0000) GS:ffff880028054000(0000)
    knlGS:0000000000000000
    Oct 6 21:00:46 server CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
    Oct 6 21:00:46 server CR2: ffff880130a6d858 CR3: 000000012e397000 CR4:
    00000000000006e0
    Oct 6 21:00:46 server DR0: 0000000000000000 DR1: 0000000000000000 DR2:
    0000000000000000
    Oct 6 21:00:46 server DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
    0000000000000400
    Oct 6 21:00:46 server Process apcupsd (pid: 5238, threadinfo
    ffff88012e3aa000, task
    ffff88012fa0d910)
    Oct 6 21:00:46 server Stack:
    Oct 6 21:00:46 server ffff88012e366000 ffff88012f90e900 ffff88012fa6d808
    ffff88012fa6d800
    Oct 6 21:00:46 server <0> 0000000000000000 ffffffff81305932 0000000000000292
    ffff88012e366000
    Oct 6 21:00:46 server <0> ffff88012f90e900 0000000000000000 ffff88012f90e900
    ffffffff81244d98
    Oct 6 21:00:46 server Call Trace:
    Oct 6 21:00:46 server [<ffffffff81305932>] ? serial_close+0x72/0xe0
    Oct 6 21:00:46 server [<ffffffff81244d98>] ? tty_release_dev+0x198/0x590
    Oct 6 21:00:46 server [<ffffffff810afc3f>] ? vfs_ioctl+0x2f/0xb0
    Oct 6 21:00:46 server [<ffffffff812451a1>] ? tty_release+0x11/0x20
    Oct 6 21:00:46 server [<ffffffff810a27ad>] ? __fput+0xcd/0x1e0
    Oct 6 21:00:46 server [<ffffffff8109ef2b>] ? filp_close+0x5b/0x90
    Oct 6 21:00:46 server [<ffffffff8109f011>] ? sys_close+0xb1/0x120
    Oct 6 21:00:46 server [<ffffffff8100b3ab>] ? system_call_fastpath+0x16/0x1b
    Oct 6 21:00:46 server Code: 18 4c 8b 74 24 20 48 83 c4 28 c3 0f 1f 00 8b
    75 18 83
    fe 01 0f 85 f3 00 00 00 ff 4d 18 8b 75 18 85 f6 75 a9 48 8d 85 50 00 00 01
    <f0> 80
    8d 50 00 00 01 01 41 80 8c 24 fc 01 00 00 20 4c 89 f6 4c
    Oct 6 21:00:46 server RIP [<ffffffff8124ba55>]
    tty_port_close_start+0xc5/0x1d0
    Oct 6 21:00:46 server RSP <ffff88012e3abdb8>
    Oct 6 21:00:46 server CR2: ffff880130a6d858
    Oct 6 21:00:46 server ---[ end trace ed2ac2b5c302fe3c ]---
    Oct 6 21:00:46 server note: apcupsd[5238] exited with preempt_count 2

    With 2.6.31.1 everything worked flawlessly.
    I use an usb to serial converter, here the output from lspci -v for the
    converter:

    Bus 006 Device 002: ID 067b:2303 Prolific Technology, Inc. PL2303 Serial Port
    Device Descriptor:
    bLength 18
    bDescriptorType 1
    bcdUSB 1.10
    bDeviceClass 0 (Defined at Interface level)
    bDeviceSubClass 0
    bDeviceProtocol 0
    bMaxPacketSize0 64
    idVendor 0x067b Prolific Technology, Inc.
    idProduct 0x2303 PL2303 Serial Port
    bcdDevice 4.00
    iManufacturer 1 Prolific Technology Inc.
    iProduct 2 USB-Serial Controller D
    iSerial 0
    bNumConfigurations 1
    Configuration Descriptor:
    bLength 9
    bDescriptorType 2
    wTotalLength 39
    bNumInterfaces 1
    bConfigurationValue 1
    iConfiguration 0
    bmAttributes 0xa0
    (Bus Powered)
    Remote Wakeup
    MaxPower 100mA
    Interface Descriptor:
    bLength 9
    bDescriptorType 4
    bInterfaceNumber 0
    bAlternateSetting 0
    bNumEndpoints 3
    bInterfaceClass 255 Vendor Specific Class
    bInterfaceSubClass 0
    bInterfaceProtocol 0
    iInterface 0
    Endpoint Descriptor:
    bLength 7
    bDescriptorType 5
    bEndpointAddress 0x81 EP 1 IN
    bmAttributes 3
    Transfer Type Interrupt
    Synch Type None
    Usage Type Data
    wMaxPacketSize 0x000a 1x 10 bytes
    bInterval 1
    Endpoint Descriptor:
    bLength 7
    bDescriptorType 5
    bEndpointAddress 0x02 EP 2 OUT
    bmAttributes 2
    Transfer Type Bulk
    Synch Type None
    Usage Type Data
    wMaxPacketSize 0x0040 1x 64 bytes
    bInterval 0
    Endpoint Descriptor:
    bLength 7
    bDescriptorType 5
    bEndpointAddress 0x83 EP 3 IN
    bmAttributes 2
    Transfer Type Bulk
    Synch Type None
    Usage Type Data
    wMaxPacketSize 0x0040 1x 64 bytes
    bInterval 0
    Device Status: 0x0000
    (Bus Powered)

    Thanks in advance
    Bye,
    David Arendt



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