This patch is from John Rose <johnrose@austin.ibm.com>

This patch changes the RPA PCI Hotplug and DLPAR modules to use more
conventional error values for return codes.  The goal is to make failure
conditions obvious in the wrapper functions and in the caller code.
Signed-off-by: John Rose <johnrose@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>