Re: [2.6.39] crash in acm_ctrl_msg+0x16/0x59

[Riccardo Magliocchetti]

Il 30/05/2011 11:19, Riccardo Magliocchetti ha scritto:
> Hi,
>
> Il 30/05/2011 07:54, Oliver Neukum ha scritto:
> > Am Sonntag, 29. Mai 2011, 16:04:02 schrieb Riccardo Magliocchetti:
> >
> > > mtp-probe: bus: 6, device: 4 was not an MTP device
> > > [20462.901834] cdc_acm 6-1:1.0: ttyACM0: USB ACM device
> > > [20462.904417] usbcore: registered new interface driver cdc_acm
> > > [20462.904420] cdc_acm: v0.26:USB Abstract Control Model driver for USB
> > > modems and ISDN adapters
> > > [20463.624142] usb 6-1: USB disconnect, device number 4
> > > [20463.641859] CPU 0
> > >
> > > This is the stracktrace:
> > >
> > > acm_ctrl_msg+0x16/0x59
> > > mutex_lock+0x13/0x2a
> > > acm_port_down+0x4c/0xcb
> > > acm_tty_close+0x75/0x93
> > > tty_release+0x1b5/0x47c
> > > ? compat_do_readv_write+0x199/0x1ae
> > > fput+0xf8/0x1ad
> > > filp_close+0x69/0x75
> > > sys_close+0x8a/0xea
> > > sysenter_dispatch+0x07/0x32
> >
> > So we are trying to talk to a device that is already gone.
> > Is there anything unusual about your device? Could you
> > post "lsusb -v"?
>
> Yes, the unusual thing is that is very prone to freezing when booting,
> in fact it freezed when i got the crash in the laptop. Will post lsusb
> output later in the day.

Here's the lsusb -v

Bus 006 Device 003: ID 1457:5122 First International Computer, Inc. 
OpenMoko Neo1973 / Neo Freerunner kernel cdc_ether USB network
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            2 Communications
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x1457 First International Computer, Inc.
  idProduct          0x5122 OpenMoko Neo1973 / Neo Freerunner kernel 
cdc_ether USB network
  bcdDevice            3.12
  iManufacturer           1 Linux 2.6.29-20100313.git973a41fc with 
s3c2410_ud
  iProduct                2 RNDIS/Ethernet Gadget
  iSerial                 0
  bNumConfigurations      2
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           67
    bNumInterfaces          2
    bConfigurationValue     2
    iConfiguration          0
    bmAttributes         0xc0
      Self Powered
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         2 Communications
      bInterfaceSubClass      2 Abstract (modem)
      bInterfaceProtocol    255 Vendor Specific (MSFT RNDIS?)
      iInterface              3 RNDIS Communications Control
      CDC Header:
        bcdCDC               1.10
      CDC Call Management:
        bmCapabilities       0x00
        bDataInterface          1
      CDC ACM:
        bmCapabilities       0x00
      CDC Union:
        bMasterInterface        0
        bSlaveInterface         1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0008  1x 8 bytes
        bInterval              32
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0
      iInterface              4 RNDIS Ethernet Data
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        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     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           80
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0xc0
      Self Powered
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         2 Communications
      bInterfaceSubClass      6 Ethernet Networking
      bInterfaceProtocol      0
      iInterface              5 CDC Ethernet Control Model (ECM)
      CDC Header:
        bcdCDC               1.10
      CDC Union:
        bMasterInterface        0
        bSlaveInterface         1
      CDC Ethernet:
        iMacAddress                      7 DA51BC59708F
        bmEthernetStatistics    0x00000000
        wMaxSegmentSize               1514
        wNumberMCFilters            0x0000
        bNumberPowerFilters              0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0010  1x 16 bytes
        bInterval              32
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           0
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0
      iInterface              0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           2
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0
      iInterface              6 CDC Ethernet Data
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        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     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
Device Status:     0x0001
  Self Powered

thanks,
riccardo
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