Messages in this thread | | | From | Oliver Neukum <> | Subject | Re: Oops in CDC ACM after an Openmoko phone (neo1973) changes its usb interface from ACM to Ethernet | Date | Mon, 3 Aug 2009 15:04:19 +0200 |
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Am Montag, 3. August 2009 11:17:05 schrieb Alex Riesen: > 466 ep = (usb_pipein(acm->rx_endpoint) ? acm->dev->ep_in : > acm->dev->ep_out) > 467 [usb_pipeendpoint(acm->rx_endpoint)]; > 468 if (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.
Regards Oliver
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