Re: Load hid.o module synchronously?

Bill Davidsen
2004-04-28T14:04:15Z

Patrick J. LoPresti wrote:
> Chris Friesen <cfriesen@nortelnetworks.com> 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@tmr.com)
"The secret to procrastination is to put things off until the
last possible moment - but no longer" -me