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

EEH scans the system I/O adapters at boot for EEH-capabilities.  If no
EEH-capable adapters are found, the subsystem is marked disabled for the life
of the system.  EEH should allow dynamic enabling of the EEH subsystem when
hotplug-adding an adapter.
Signed-off-by: John Rose <johnrose@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>