Function devices::virtio::block::asynchronous::process_one_chain

async fn process_one_chain(
    queue: &RefCell<Queue>,
    avail_desc: DescriptorChain,
    disk_state: &RwLock<DiskState>,
    flush_timer: &RefCell<TimerAsync<Timer>>,
    flush_timer_armed: &RefCell<bool>
)

Process one descriptor chain asynchronously.