Re: Which node has the device been bound to?

[Greg KH <greg@kroah.com>]

On Tue, Jun 04, 2002 at 01:05:09AM +0200, Oliver Neukum wrote:
> 
> > > I can't come up with anything better than a set of ioctls that return
> > > the contents of the individual files. And I know that this is ugly.
> > > I don't claim that this is a good solution, just that it's the only
> > > solution I have and that there's a race otherwise.
> > > You simply cannot use names, thus parsing files for the name of the
> > > node won't work.
> >
> > Or we could just drop the whole idea of using ioctl() and live with the
> > "instability" of parsing a filesystem :)
> 
> There is no such thing is an acceptable race condition.

Then use the device tree in driverfs as a "hint" as to where you might
find your device.  Then rely on other things (fs labels, usb serial
numbers, ethernet mac addresses, etc.) to verify if the device you are
talking to really is the one you think it is.

thanks,

greg k-h

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