Hi Regarding pmf(9) API, is it safe to call pmf_device_deregister() if the device was not successfully registered as a power handler? The documentation does not mention this (though the code looks as if that would work fine), nor the device_pmf_is_registered() function which may not be actually required? Some driver detach functions use it and some do not..
Also, is it allowed to sleep during suspend/resume? Again, the documentation does not mention this, but it seems that shutting down cleanly might involve a flush of some kind. (I see that pmf_system_suspend() does flush disk caches specifically before the suspend, which sidesteps the issue a little) iain
