On Tuesday 23 January 2007 4:32 pm, Greg KH wrote:
> On Tue, Jan 23, 2007 at 04:22:43PM -0800, David Brownell wrote:
> > > > > static struct attribute *dev_attrs[] = {
> > > > > + /* power management attributes */
> > > > > + &dev_attr_autosuspend.attr,
> > > >
> > > > Belongs in /sys/devices/.../power/... then, right?
> > >
> > > No, I thought we want to drop that power/ directory.
> >
> > Dropping that directory hasn't AFAIK ever been discussed.
> > If it were to be dropped, where would the per-device wakeup
> > flags live?
>
> I don't know, it just really annoys me to see that power directory there
> with no use for it for a lot of devices :)
I have that same feeling about sysfs itself, on occasion. The driver
model functionality can be had without sysfs exports ...
> > > I have no
> > > objection to it going into the USB device directory, as that is the
> > > proper place for it.
> >
> > It'd be OK for a USB-specific mechanism, but there was at
> > one point some discussion about this mechanism being more
> > generally appropriate.
>
> Hm, I missed that. This seems to be a very usb-specific thing at the
> moment. And an annoying one too for some of my devices...powering off
> the bus for USB devices with no drivers might start causing devices that
> use usbfs to do wierd things. Still trying to work it all out though...
It's not powered "off"; it's just in a low power state.
Agreed about the wierdness being troublesome. The Linux-USB developers
need a few more CATC/LeCroy tools to help sort out such trouble. :)
- Dave
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