tests: Reset the USB device before testing

The kernel caches URBs to get descriptor values. Doing a reset before
starting the record ensures that we will see any descriptor reads in the
usbmon trace and can therefore correctly replay them (possibly not true
if they happen multiple times).

1 files changed, 5 insertions, 0 deletions

diff --git a/tests/create-driver-test.py.in b/tests/create-driver-test.py.in
index 3eabb78..8173271 100755
--- a/tests/create-driver-test.py.in
+++ b/tests/create-driver-test.py.in
@@ -105,6 +105,11 @@ process.wait()
 # Run capture
 # https://osqa-ask.wireshark.org/questions/53919/how-can-i-precisely-specify-a-usb-device-to-capture-with-tshark/
 
+print(f'### Reseting USB port (as descriptors could be missing in the dump otherwise)')
+usb_device.open()
+usb_device.reset()
+usb_device.close()
+
 print(f'### Starting USB capture on usbmon{bus_num}')
 capture_pid = os.fork()
 assert(capture_pid >= 0)