Public bug reported:

Recent kernels are using predictable naming for network interfaces, so
the network stack is more tied to PCI naming. This can be a problem in
hotplug scenarios, because PCI addresses will change if devices are
removed and then re-added. This situation seems unusual, but it can
happen if a user wants to replace a NIC without rebooting the machine,
for example.

The patch attached here should deal with this situation, since it makes 
PHB/domain number fixed based on device-tree properties.
 
The problem can be reproduced by removing and re-adding a PCI network adapter, 
so its address will change and, per predictable naming scheme, so is the 
interface name.

** Affects: ubuntu
     Importance: Undecided
     Assignee: Taco Screen team (taco-screen-team)
         Status: New


** Tags: architecture-ppc64le bugnameltc-139480 severity-medium 
targetmilestone-inin1604

** Tags added: architecture-ppc64le bugnameltc-139480 severity-medium
targetmilestone-inin1604

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https://bugs.launchpad.net/bugs/1560514

Title:
  Predictable naming mechanism is leading to issues in DLPAR operations
  of NICs

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