So I have to write a whole extra set of code paths to duplicate normal
functionality during power off
> So sure, there are tons of issues here, but none of them have, in my
> opinion, anything to do with the device model itself. More just normal
> implementation details.
My concern is that we need to make the implementation details simple. eg
so that simple things like "save state" can be done before we get into
"no this, no that , no the other" situations. Also so that for the many
drivers where freezing the system once we have irqs off is easier (a lot
of sound for example is easiest done by disable irq, disable dma engine,
copy registers, return) can be done late and with small amounts of code
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