Re: Load hid.o module synchronously?

[Patrick J. LoPresti]

Oliver Neukum <oliver@xxxxxxxxxx> writes:

> The set of devices connected to the machine is not static. Waiting
> until all hardware is ready is very hard to even define.

It is very easy to define for 99.999% of all keyboards, which start
off connected and stay connected.

This should be simple.  I want to load a driver at boot time and wait
until it either binds to something or fails to do so.  If the user is
adding or removing hardware while the module is loading, I simply do
not care what the system does.  But if the hardware is not changing, I
care a great deal...  And the latter case is perfectly well-defined.

> > be glad to use any other mechanism to achieve the same effect; I just
> > have not seen one yet.
> 
> Issue ioctl() USBDEVFS_CONNECT through usbfs. It does a synchronous
> probe for a specific device.

I suppose this would solve my USB keyboard problem.  But a) it seems
very complex for such a simple need; and b) it does not work for
non-USB devices, which are also causing me grief.

 - Pat
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