K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2006-01-20T21:59:13.000000Z
K 7
svn:log
V 674
When loading a driver that is a subclass of another driver don't set the
devclass's parent pointer if the two drivers share the same devclass.  This
can happen if the drivers use the same new-bus name.  For example, we
currently have 3 drivers that use the name "pci": the generic PCI bus
driver, the ACPI PCI bus driver, and the OpenFirmware PCI bus driver.  If
the ACPI PCI bus driver was defined as a subclass of the generic PCI bus
driver, then without this check the "pci" devclass would point to itself
as its parent and device_probe_child() would spin forever when it
encountered the first PCI device that did have a matching driver.

Reviewed by:	dfr, imp, new-bus@

END