Re: Load hid.o module synchronously?

[Bill Davidsen]

Patrick J. LoPresti wrote:
> Chris Friesen <cfriesen@xxxxxxxxxxxxxxxxxx> writes:
>
>
> > Patrick J. LoPresti wrote:
> >
> >
> > > For example, I invoke "modprobe hid" to make my USB keyboard work.
> > > This loads the module and exits immediately, causing my script to
> > > proceed, before the USB keyboard is probed and ready.
> > > I want to wait until the driver is finished initializing (i.e., a USB
> > > keyboard is either found or not found) before my script continues.
> > > How can I do that?
> >
> > How about scanning the usb device tree to see if the keyboard is
> > present and properly detected?
>
>
> You mean under sysfs or usbfs?  Or both?
>
> I see how I can scan for a USB keyboard after loading the USB host
> controller module.  I think.  But what do I look for, exactly, to tell
> when hid.o has hooked itself up to the keyboard?

You need to be able to tell "not hooked yet" from "never saw it" for 
reliable operation. I don't know how to do that, sorry.

--
   -bill davidsen (davidsen@xxxxxxx)
"The secret to procrastination is to put things off until the
 last possible moment - but no longer"  -me
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