__QUEUE_STATE_DRV_XOFF
clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
set_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
return test_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state);
#define QUEUE_STATE_DRV_XOFF (1 << __QUEUE_STATE_DRV_XOFF)
if (test_and_clear_bit(__QUEUE_STATE_DRV_XOFF, &dev_queue->state)) {