ST_M2M_RUNNING
if (!test_and_clear_bit(ST_M2M_RUNNING, &bdisp->state))
clear_bit(ST_M2M_RUNNING, &bdisp->state);
if (!test_bit(ST_M2M_RUNNING, &bdisp->state)) {
if (!test_bit(ST_M2M_RUNNING, &bdisp->state) || (curr_ctx != ctx))
set_bit(ST_M2M_RUNNING, &bdisp->state);