On Fri, 7 Aug 2020 12:18:54 +0200, Cédric Le Goater wrote:
> When a passthrough IO adapter is removed from a pseries machine using
> hash MMU and the XIVE interrupt mode, the POWER hypervisor expects the
> guest OS to clear all page table entries related to the adapter. If
> some are still present, the RTAS call which isolates the PCI slot
> returns error 9001 "valid outstanding translations" and the removal of
> the IO adapter fails. This is because when the PHBs are scanned, Linux
> maps automatically the INTx interrupts in the Linux interrupt number
> space but these are never removed.
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/pci: unmap legacy INTx interrupts when a PHB is removed
      https://git.kernel.org/powerpc/c/3a3181e16fbde752007759f8759d25e0ff1fc425

cheers