Re: Oops in CDC ACM after an Openmoko phone (neo1973) changes its usb interface from ACM to Ethernet

[Alex Riesen]

On Mon, Aug 3, 2009 at 15:04, Oliver Neukum<oliver@xxxxxxxxxx> wrote:
> Am Montag, 3. August 2009 11:17:05 schrieb Alex Riesen:
>> 466ÂÂÂÂÂÂÂÂÂÂÂÂÂep = (usb_pipein(acm->rx_endpoint) ? acm->dev->ep_in :
>> acm->dev->ep_out)
>> 467ÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂÂ[usb_pipeendpoint(acm->rx_endpoint)];
>> 468ÂÂÂÂÂÂÂÂÂÂÂÂÂif (usb_endpoint_xfer_int(&ep->desc))
>>
>> So it looks like ep is NULL (usb_endpoint_xfer_int accesses
>> desc.bmAttributes, which is 3 bytes off the beginning of struct
>> usb_host_endpoint (desc being the first field in usb_host_endpoint).
>
> This tells you that the device has been disconnected. The question
> is not why this function fails, but why it is called even though the
> device has been disconnected.

Cool. How can I help?
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