ab1b371163
by Ken Hornstein and myself. Add flags to struct device, and define one as "active". Devices are initially active from config_attach(). Their active state may be changed via config_activate() and config_deactivate(). These new functions assume that the device being manipulated will recursively perform the action on its children. Together, config_deactivate() and config_detach() may be used to implement interrupt-driven device detachment. config_deactivate() will take care of things that need to be performed at interrupt time, and config_detach() (which must run in a valid thread context) finishes the job, which may block. |
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