XMIT_SENDING
if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
clear_bit(XMIT_SENDING, &(info->tx_state));
if (test_and_set_bit(XMIT_SENDING, &(info->tx_state)))
clear_bit(XMIT_SENDING, &(info->tx_state));
clear_bit(XMIT_SENDING, &(info->tx_state));
if (test_and_set_bit(XMIT_SENDING, &(info->tx_state))) {
clear_bit(XMIT_SENDING, &(info->tx_state));