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Re: devfs and device name persistance

To: Jurgen Botz <jurgen@xxxxxxxx>
Subject: Re: devfs and device name persistance
From: Johannes Erdfelt <jerdfelt@xxxxxxxxxxx>
Date: Wed, 10 May 2000 12:53:09 -0700
Cc: Richard Gooch <rgooch@xxxxxxxxxxxxxxx>, devfs@xxxxxxxxxxx
In-reply-to: <200005101913.MAA22554@nova.botz.org>; from jurgen@botz.org on Wed, May 10, 2000 at 12:13:07PM -0700
References: <rgooch@ras.ucalgary.ca> <200005101913.MAA22554@nova.botz.org>
Sender: owner-devfs@xxxxxxxxxxx
On Wed, May 10, 2000, Jurgen Botz <jurgen@xxxxxxxx> wrote:
> Richard Gooch wrote:
> > However, it probably makes sense to put *all* USB devices under
> > /dev/usb, just like the SCSI and IDE trees.
> 
> The problem with this is that some USB devices are layers underneath
> more general devices... for example the v4l stuff.  Ergo I have the
> same problem as JE's floppies with my two video inputs: one is a PCI
> board (BT848) and the other a USB cam.  Which one becomes video0 and
> which video1 depends on the order in which the drivers are loaded...
> since the drivers are loaded on demand this doesn't work well.
> 
> Ok, in my specific case I can solve this by just always forcing the
> bttv driver to load at boot time so that it will always be
> /dev/v4l/video0, but that's ugly.  Also it wouldn't work if I had,
> say, another video device which was a PCMCIA card.

Device naming is a separate problem altogether.

I've tried touching on it in the past but I seem to be confusing people
even more.

JE


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