Re: Save trackpad settings during sleep
On Sun, Jun 10, 2001 at 05:10:53PM +0200, Michael Schmitz wrote:
> >
> > On my TiBook, BenH' 2.4.5-pre kernel reprobes all ADB devices after
> > wakeup. This, I think, is not new; what's changed is the fact that the
> > rescan is not done inline in the wakeup code path, but rather a kernel
> > thread is started that does the probe. Wakeup is faster, since we don't
> > block on the ADB probe.
>
> But we run pmud before the device wakeup has done. This is extremely bad,
> opening /dev/adb should return -EAGAIN while the bus state isn't sane, as
> after sleep (there isn't anything user space related to care about before
> ADB is initialized on boot).
Er, quickly reading pmud.c, it _looks_ like we open the device (/dev/adb) once
and after that always assume it's open/sane. Same w/ /dev/pmu. It also
looks like currently we use some 'magic' to do adb stuff, instead of trying
to do this via ioctls or something like that..
--
Tom Rini (TR1265)
http://gate.crashing.org/~trini/
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