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------- Comment From gpiccoli@xxxxxxxxxx 2016-06-09 13:19 EDT-------
Comment on attachment 107133
[PATCH] powerpc/pci: Assign fixed PHB number based on device-tree properties

Marking the old patch as obsolete.
Once the newer gets accepted upstream, I'll paste the commit ID.

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

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

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  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.

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