SM6FBQ / HackRF clone - History

Don't call callback or submit new transfers once streaming stops.

This stops the RX callback from being called again with further data
once it has returned nonzero, or after a transfer had an error status.

Clear streaming flag if we didn't resubmit a transfer.

If result < 0 here, libusb_submit_transfer returned an error, so we
need to shut down.

If !resubmit, then cancel_transfers() was already called by one of the
stop or close functions, so streaming is already false.

Don't exit transfer thread if an error occurs.

In the case of a libusb error, we still need the transfer thread
running, in order to handle outstanding cancellations and to signal the
condition variable when that is done.

Merge pull request #1067 from Matioupi/master

proposal to fix regression in 4c9fcf86651232c2104b57510a0ac86cf86123e4 #1057

fix regression in 4c9fcf86651232c2104b57510a0ac86cf86123e4

Merge pull request #1063 from metayan/fast-exit

Ensure fast exit

Cleaner fast exit

Interrupt the event handling thread instead of waiting for timeout.

Ensure fast exit

transfer_threadproc has a timeout of half a second, so
when kill_transfer_thread tries to pthread_join, it often
has to wait until the timeout kicks in.

With this fix, we ensure that a final request is made after
request_exit has been called, so that transfer_threadproc can exit its
loop in a fast and clean manner.

Merge pull request #982 from martinling/bug-180

Firmware sample buffer management overhaul, including safe handling of TX underruns