Re: calling runtime PM from system PM methods

On Fri, 10 Jun 2011, Mark Brown wrote:

quoted

Well, this is a SHOULD, not a MUST.  If you want your driver to leave a
device in a low-power state, it can do so.  Just bear in mind that the
PM core's idea of the device's runtime power state may end up not
matching reality unless you're careful.

This is part of the trouble, it all feels like a lot more work than it
should be for relatively common cases.  In the audio case we're fine as
the subsystem implements a completely independent PM infrastructure
which ignores the PM core except for system suspend (and sometimes
ignores that), it's noticably harder to reason about what's going on
when I go outside there and when I think about what I'm doing it always
feels like it should be possible to factor it out of the drivers.

What would make the common cases easier?

Alan Stern