Re: [PATCH kernel v3] powerpc/pci: Remove LSI mappings on device teardown

On Wed, 2 Dec 2020 11:52:22 +1100, Alexey Kardashevskiy 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: Remove LSI mappings on device teardown
      https://git.kernel.org/powerpc/c/450be4960a0fb89b931a6bb3c3f0bb538ac4c03c

cheers