On Sat, 20 Aug 2022 14:33:27 +0200, Pali Rohár wrote:

If there's no PCI host bridge with ISA then check for PCI host bridge with
alias "pci0" (first PCI host bridge) and if it exists then choose it as the
primary PCI host bridge.

This makes choice of primary PCI host bridge more stable across boots and
updates as the last fallback candidate for primary PCI host bridge (if
there is no choice) is selected arbitrary.

[...]

Applied to powerpc/next.

[1/1] powerpc/fsl-pci: Choose PCI host bridge with alias pci0 as the primary
      https://git.kernel.org/powerpc/c/e082e99f6f87f5204b2531d5a3db7bbd929d23b1

cheers