From: Greg KH <greg@kroah.com>
To: linux-hotplug@vger.kernel.org
Subject: Re: config questions
Date: Wed, 28 Aug 2002 05:21:02 +0000 [thread overview]
Message-ID: <marc-linux-hotplug-103051214622011@msgid-missing> (raw)
In-Reply-To: <marc-linux-hotplug-103034135025502@msgid-missing>
On Wed, Aug 28, 2002 at 05:13:04AM +0100, Ajay wrote:
>
> > > and in /etc/hotplug/interfaces reacted to the
> > arguments registered and
> > > derigistered to do what I needed for /dev/usb0
> >
> > There's no such thing as /dev/usb0! :)
>
> Is this the usb hub? I can't find usb0 in my system
> either(RHL 7.3), but /proc/devices lists "180 usb". I
> tried
> mknod /dev/usb/hub c 180 0
> but it didn't seem to point to the hub ('open' failed
> : "No such device"). What is the device file for the
> USB-UHCI hub?
Why do you want to talk to the root uhci hub? Why would you want to
talk to _any_ hub for that matter? You can't really do anything with
them.
And device 180 0 is for a USB printer, not a USB hub. See the list at:
http://www.linux-usb.org/usb.devices.txt
for more info on the reserved USB major:minor numbers.
> AFAICS hotplug checks the file /proc/bus/usb/devices.
> Why not communicate with the hub directly using ioctl
> calls?
If you _really_ want to send an ioctl command to a USB hub, you have to
do it through usbfs, which is mounted at /proc/bus/usb usually. You
need to find the specific file under that directory that matches your
hub.
I really don't like having that ioctl in the kernel, and am looking to
remove it. Why do you want to call it?
Actually, in looking at the kernel code some more, I don't see how
anyone can call hub_ioctl()...
thanks,
greg k-h
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prev parent reply other threads:[~2002-08-28 5:21 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-26 5:50 config questions Ian Walters
2002-08-27 14:53 ` David Brownell
2002-08-27 23:50 ` Ian Walters
2002-08-28 4:13 ` Ajay
2002-08-28 5:21 ` Greg KH [this message]
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