Interrupt
Either queue all transactions by calling the function spi_device_queue_trans() and, at a later time, query the result using the function spi_device_get_trans_result(), or handle all requests synchronously by feeding them into spi_device_transmit().
既然是中断传输，还要query the result using the function？？？？？传完了中断，处理不就行了？？不明白！！