Re: [PATCH] pci bridge class code

[Alan Cox <alan@lxorguk.ukuu.org.uk>]

On Iau, 2003-05-29 at 21:40, Russell King wrote:
> On Thu, May 29, 2003 at 01:17:42PM -0700, Mark Haverkamp wrote:
> > This adds pci-pci bridge driver model class code.  Entries appear in 
> > /sys/class/pci_bridge.
> 
> Hmm.  Ok.
> 
> How do you propose to handle the following case:
> 
> Mobility Electronics supply a Cardbus to PCI bridged "docking station"
> which has a PCI-PCI bridge on with vendor stuff above 0x40.  It appears
> as a standard PCI-PCI bridge; the only specific identifying information
> are the device and vendor IDs.  How can I guarantee that a driver I
> write for this device will be picked up in preference to your driver.
> 
> (Given that your driver would probably be always loaded, and my driver
> could well be a loadable module.)

The same is true of serveral hot docking bridges such as the one on the
IBM TP600 and also of other devices which happen to be both a PCI-PCI
bridge and have other magic stuck on them.