powerpc/eeh: Create PEs duing EEH initialization
The patch creates PEs and associated the newly created PEs with it parent/silbing as well as EEH devices. It would become more straight to trace EEH errors and recover them accordingly. Once the EEH functionality on one PCI IOA has been enabled, we tries to create PE against it. If there's existing PE, to which the current PCI IOA should be attached, the existing PE will be converted from "device" type to "bus" type accordingly. Signed-off-by: NGavin Shan <shangw@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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