Hi!
> > > which error should a character device return if a read/write cannot be
> > > serviced because the device is suspended? Shouldn't there be an error
> > > code specific to that?
> >
> > If you are talking system suspend, then userspace should not run while
> > devices are suspended.
> >
> > If you are talking runtime suspend, you should probably just wake the
> > device up on first access.
>
> Do you really think a device driver should override an explicitely
> selected power state?
(So we are talking runtime suspend?)
No, I do not know what the right interface is. I started to suspect
that drivers should suspend/resume devices automatically, without
userland help. Maybe having autosuspend_timeout in sysfs is enough.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
