Re: [PARPORT] Questions with ppdev

From: Michael Reinelt (
Date: Thu Mar 15 2001 - 06:12:34 EST

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    Hi, me again...

    Tim Waugh wrote:
    > On Thu, Mar 15, 2001 at 11:30:35AM +0100, Michael Reinelt wrote:
    > > sorry if I'm annoying... How does it know _which_ lowlevel driver? I
    > > don't have a reference to parport_pc somewhere...
    > parport just does request_module("parport_lowlevel"). So it doesn't
    > know. But modprobe knows, because modules.conf has an alias for
    > parport_lowlevel.

    Oh, I see... the alias seems to be an implicit one, I don't have the
    alias specified anywhere, mot 'modprobe -c' shows the alias.

    Now there's another problem: ppdev.o will _not_ request parport_lowlevel
    and therefore not load parport_pc. As far as I understood the code,
    there's no call to parport_register_driver(), which would call
    get_lowlevel_driver(), which in turn requests the module.

    bye, Michael

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