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== Comment: #18 - Andrew Donnellan - 2016-02-15 20:17:01 ==
Canonical kernel team - please apply 1bc74f1ccd457832dc515fc1febe6655985fdcd2 from the powerpc-fixes tree.

https://git.kernel.org/cgit/linux/kernel/git/powerpc/linux.git/commit/?h=fixes&id=1bc74f1ccd457832dc515fc1febe6655985fdcd2

powerpc/powernv: Fix stale PE primary bus
When PCI bus is unplugged during full hotplug for EEH recovery,
the platform PE instance (struct pnv_ioda_pe) isn't released and
it dereferences the stale PCI bus that has been released. It leads
to kernel crash when referring to the stale PCI bus.

This fixes the issue by correcting the PE's primary bus when it's
oneline at plugging time, in pnv_pci_dma_bus_setup() which is to
be called by pcibios_fixup_bus().

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


** Tags: architecture-ppc64le bugnameltc-134012 severity-critical targetmilestone-inin1604
-- 
Surelock-GA2:kernel panic @ cxl_configure_adapter+0x418/0x8b0
https://bugs.launchpad.net/bugs/1546145
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