HSC_CH_WRITE
if (test_bit(HSC_CH_WRITE, &channel->flags)) {
if (test_and_set_bit(HSC_CH_WRITE, &channel->flags))
clear_bit(HSC_CH_WRITE, &channel->flags);
clear_bit(HSC_CH_WRITE, &channel->flags);
clear_bit(HSC_CH_WRITE, &channel->flags);
clear_bit(HSC_CH_WRITE, &channel->flags);