[libusb] Request for help on understanding cause of error.

[David B. <db...@ea...>]

Hi all,

I have an libusb based application, which works fine for the most part, but occasionally fails with the following error.
And I was wondering if anyone has any helpful tips, wrt/ doing further troubleshooting, in order to pinpoint the exact cause of failure.
(I'm using the WinUSB backend, installed via Zadig v2.2.)

Thanks!

David Banas
Principal SERDES Applications Engineer
eASIC Corporation<http://www.easic.com/>
3940 Freedom Circle
Santa Clara, CA 95054

Click on the link to see the eASIC Acceleration Advantage https://www.youtube.com/watch?v=aETewN6qM8M

[ 7.057176] [000027bc] libusb: debug [windows_transfer_callback] handling I/O completion with errcode 0, size 1
[ 7.058175] [000027bc] libusb: debug [usbi_handle_transfer_completion] transfer 003794C0 has callback 0644AE12
[ 7.059175] [000027bc] libusb: debug [sync_transfer_cb] actual_length=1
[ 7.060174] [000027bc] libusb: debug [libusb_free_transfer] transfer 003794C0
[ 7.062174] [000027bc] libusb: debug [libusb_alloc_transfer] transfer 003794C0
[ 7.063173] [000027bc] libusb: debug [libusb_submit_transfer] transfer 003794C0
[ 7.064173] [000027bc] libusb: debug [composite_submit_control_transfer] using interface 0
[ 7.065172] [000027bc] libusb: debug [winusbx_submit_control_transfer] will use interface 0
[ 7.066172] [000027bc] libusb: debug [usbi_add_pollfd] add fd 1 events 1
[ 7.067172] [000027bc] libusb: debug [libusb_get_next_timeout] next timeout in 4.996461s
[ 7.069171] [000027bc] libusb: debug [libusb_handle_events_timeout_completed] doing our own event handling
[ 7.070170] [000027bc] libusb: debug [handle_events] poll fds modified, reallocating
[ 7.071170] [000027bc] libusb: debug [handle_events] poll() 2 fds with timeout in 4997ms
[ 7.759894] [000027bc] libusb: debug [handle_events] poll() returned 1
[ 7.763893] [000027bc] libusb: debug [windows_handle_events] checking fd 1 with revents = 0001
[ 7.765892] [000027bc] libusb: debug [usbi_remove_pollfd] remove fd 1
[ 7.768891] [000027bc] libusb: debug [windows_transfer_callback] handling I/O completion with errcode 1167, size 0
[ 7.771890] [000027bc] libusb: error [windows_transfer_callback] detected I/O error 1167: [1167] The device is not connected.