Because ti(4) drops a driver lock in RX handler, check whether driver is still running before re-enabling interrupts.
Because ti(4) drops a driver lock in RX handler, check whether
driver is still running before re-enabling interrupts.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase