此文涉及到system restart level的问题，对应的高通文档为doc 80-Y0513-2其中的第2.4.3章Enabling/disabling WCN-SS SSR。
To find out if SSR is enabled on WCN-SS, enter this command: cat /sys/bus/msm_subsys/devices/subsys2/restart_level To enable WCN-SS SSR, execute this command in the ADB shell echo related > /sys/bus/msm_subsys/devices/subsys2/restart_level To disable WCN-SS SSR, execute this command in the ADB shell echo system > /sys/bus/msm_subsys/devices/subsys2/restart_level
具体运行效果如下，默认的是重启手机，可修改为只重启相关模块。
cat /sys/bus/msm_subsys/devices/subsys2/restart_level SYSTEM echo related > /sys/bus/msm_subsys/devices/subsys2/restart_level cat /sys/bus/msm_subsys/devices/subsys2/restart_level RELATED echo system > /sys/bus/msm_subsys/devices/subsys2/restart_level cat /sys/bus/msm_subsys/devices/subsys2/restart_level SYSTEM
此条shell命令可以添加在/device/qcom/common/rootdir/etc/init.qcom.post_boot.sh文件中， 在系统启动的时候进行设置。
echo related > /sys/bus/msm_subsys/devices/subsys2/restart_level