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SubjectRe: ftdi_sio BUG: NULL pointer dereference
On Mon, Jun 02, 2014 at 12:24:44PM -0400, Mike Remski wrote:
> On 06/02/2014 12:20 PM, Johan Hovold wrote:
> > On Mon, Jun 02, 2014 at 12:02:40PM -0400, Mike Remski wrote:
> >> On 06/02/2014 11:40 AM, Johan Hovold wrote:
> >>> [ Please avoid top-posting. ]
> >>>
> >>> On Mon, Jun 02, 2014 at 11:16:11AM -0400, Mike Remski wrote:

> >> lsusb -v cut for the device in question.
> >>
> >> Bus 005 Device 003: ID 1fdf:1001
> >> Device Descriptor:
> >> bLength 18
> >> bDescriptorType 1
> >> bcdUSB 2.00
> >> bDeviceClass 239 Miscellaneous Device
> >> bDeviceSubClass 2 ?
> >> bDeviceProtocol 1 Interface Association
> >> bMaxPacketSize0 64
> >> idVendor 0x1fdf
> >> idProduct 0x1001
> >> bcdDevice 0.03
> >> iManufacturer 1 Sepura
> >> iProduct 2 Colour Console
> >> iSerial 0
> >> bNumConfigurations 1
> >> Configuration Descriptor:
> >> bLength 9
> >> bDescriptorType 2
> >> wTotalLength 134
> >> bNumInterfaces 4
> >> bConfigurationValue 1
> >> iConfiguration 0
> >> bmAttributes 0xc0
> >> Self Powered
> >> MaxPower 100mA
> >> Interface Association:
> >> bLength 8
> >> bDescriptorType 11
> >> bFirstInterface 0
> >> bInterfaceCount 2
> >> bFunctionClass 2 Communications
> >> bFunctionSubClass 2 Abstract (modem)
> > Is this indeed the right device? Then you seem to be using the wrong
> > driver as this is no FTDI device, but a CDC-ACM modem-class device which
> > should be driven by the cdc-acm driver.
> >
> >> bFunctionProtocol 0 None
> >> iFunction 0
> >> Interface Descriptor:
> >> bLength 9
> >> bDescriptorType 4
> >> bInterfaceNumber 0
> >> bAlternateSetting 0
> >> bNumEndpoints 1
> >> bInterfaceClass 2 Communications
> >> bInterfaceSubClass 2 Abstract (modem)
> >> bInterfaceProtocol 0 None
> >> iInterface 0
> >> CDC Header:
> >> bcdCDC 1.10
> >> CDC Call Management:
> >> bmCapabilities 0x01
> >> call management
> >> bDataInterface 1
> >> CDC ACM:
> >> bmCapabilities 0x02
> >> line coding and serial state
> >> 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 0x0040 1x 64 bytes
> >> bInterval 10
> >> Interface Descriptor:
> >> bLength 9
> >> bDescriptorType 4
> >> bInterfaceNumber 1
> >> bAlternateSetting 0
> >> bNumEndpoints 2
> >> bInterfaceClass 10 CDC Data
> >> bInterfaceSubClass 0 Unused
> >> bInterfaceProtocol 0
> >> iInterface 0
> >> Endpoint Descriptor:
> >> bLength 7
> >> bDescriptorType 5
> >> bEndpointAddress 0x01 EP 1 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 0x82 EP 2 IN
> >> bmAttributes 2
> >> Transfer Type Bulk
> >> Synch Type None
> >> Usage Type Data
> >> wMaxPacketSize 0x0040 1x 64 bytes
> >> bInterval 0
> >> Interface Association:
> >> bLength 8
> >> bDescriptorType 11
> >> bFirstInterface 2
> >> bInterfaceCount 2
> >> bFunctionClass 2 Communications
> >> bFunctionSubClass 2 Abstract (modem)
> >> bFunctionProtocol 0 None
> >> iFunction 0
> >> Interface Descriptor:
> >> bLength 9
> >> bDescriptorType 4
> >> bInterfaceNumber 2
> >> bAlternateSetting 0
> >> bNumEndpoints 0
> > The third interface lacks endpoints and crashes the ftdi_sio driver.
> > This shouldn't happen (even if you're forcing the wrong driver to bind),
> > so I'll fix it up if still broken in v3.15-rc.
> >
> > Thanks,
> > Johan
> Johan,
> Thanks again. Yes, the device does indeed have an FTDI embedded in it;
> they've programmed in their own ids. They supply a Windows driver for
> it, but that doesn't do me any good. :)

Not just their own ID's it seems.

Have you tried just using the cdc-acm driver? The ports should up as
/dev/ttyACMx instead of ttyUSBx.

Johan


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