Somewhat. What I'd like is to have that a construct of that sort on a
per-driver basis though :-) Now the question is, in what way would the
above be different from a simple suspend mutex ? I've been using mutexes
in the past for a couple of drivers (iirc, that's how I did it for
dmasound_pmac, though that driver is long past obsolescence now).
But yes, that's the idea, something under control of drivers, instead of
a 3rd party freezer that tries to hit at processes.
Yeah, whatever the implementation is, though, the interface should be
transparent. But then, I see little use of that. Mostly things like this
sysfs write to unbind Alan was talking about. Driver workqueues probably
need to be functioning all the way until the driver itself is suspended,
in which case, the driver may just flush_worqueues in it's suspend path
at the right time to make sure it doesn't exit with something still
pending.
Ben.
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