QLC_BC_VF_SEND
if (test_and_set_bit(QLC_BC_VF_SEND, &vf->state))
clear_bit(QLC_BC_VF_SEND, &vf->state);
while (test_and_set_bit(QLC_BC_VF_SEND, &vf->state))
clear_bit(QLC_BC_VF_SEND, &vf->state);