TXT Buffer in bus-off
Error frame transmission causes transfer of TXT buffer to either READY (without reaching retransmit limit) or FAILED (when retransmit limit was reached). However if retransmit limit remains disabled (or it is not reached) during transition to bus-off state, the buffer goes back to READY state. Such a behaviour is logically incorrect! Additional logic should be implemented, that shall force active TXT Buffer to go to FAILED when Error frame transmission causes controller to go to BUS OFF.