设备超时。
该请求使驱动器交叉进程挂起，直至设备请求中断或设备超时。
The request causes the driver fork process to be suspended until the device requests an interrupt or the device times out.
尽管它提供的精确性比高精确度计时器要低，但它对于在处理物理设备时提供错误覆盖的传统驱动程序超时来说比较理想。
Although it offers less accuracy than high-resolution timers, it is ideal for traditional driver time-outs that provide coverage of error cases when dealing with physical devices.
应用推荐