linux-kernel - Re: 2.6.22: pcspkr driver no longer loads automatically

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Date:	Thu, 09 Aug 2007 00:39:35 +0200
From:	Kay Sievers <kay.sievers@...y.org>
To:	Bill Nottingham <notting@...hat.com>
Cc:	Chuck Ebbert <cebbert@...hat.com>, Jeff Garzik <jeff@...zik.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Dmitry Torokhov <dtor@...ightbb.com>, Greg KH <greg@...ah.com>
Subject: Re: 2.6.22: pcspkr driver no longer loads automatically

On Wed, 2007-08-08 at 18:22 -0400, Bill Nottingham wrote:
> Kay Sievers (kay.sievers@...y.org) said: 
> > Ah, ok, makes sense. Yeah, that weird "platform devices loads itself by
> > the name" thing got disabled in the platform subsystem. It caused
> > modprobe loops for other devices.
> > 
> > The whole idea of issuing MODALIAS with plain module names instead of
> > aliases can't really work, but the platform maintainer didn't like to
> > use the usual aliases and the matches in the modules, for a reason I
> > didn't understand while we talked about the problem last time.
> 
> So, the solution is for the platform device to issue a random modalias
> that pcskpr exports?

I would still like to see "MODALIAS=platform:<string>" exported by the
bus, and matching aliases the modules, just like every other subsystem
does.

Like SCSI, with the "artificial" aliases for the modules it wants to
autoload:
  $ /sbin/modinfo sd_mod
  ...
  alias:          scsi:t-0x0e*
  alias:          scsi:t-0x07*
  alias:          scsi:t-0x00*
  ...

  $ cat /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/modalias
  scsi:t-0x00

That way you would get full control over the loading or blacklisting
with module-init-tools config files, which doesn't work with direct
module name requests, and no magic in the bus code or the drivers would
be needed.

Kay

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