[BUG] PCIe on Armada 388 broken since 5.9

[Russell King - ARM Linux admin]

Hi,

It appears that PCIe on Armada 388 has been broken in 5.9. Here are
the boot messages:

mvebu-pcie soc:pcie: host bridge /soc/pcie ranges:
mvebu-pcie soc:pcie:      MEM 0x00f1080000..0x00f1081fff -> 0x0000080000
mvebu-pcie soc:pcie:      MEM 0x00f1040000..0x00f1041fff -> 0x0000040000
mvebu-pcie soc:pcie:      MEM 0x00f1044000..0x00f1045fff -> 0x0000044000
mvebu-pcie soc:pcie:      MEM 0x00f1048000..0x00f1049fff -> 0x0000048000
mvebu-pcie soc:pcie:      MEM 0xffffffffffffffff..0x00fffffffe -> 0x0100000000
mvebu-pcie soc:pcie:       IO 0xffffffffffffffff..0x00fffffffe -> 0x0100000000
mvebu-pcie soc:pcie:      MEM 0xffffffffffffffff..0x00fffffffe -> 0x0200000000
mvebu-pcie soc:pcie:       IO 0xffffffffffffffff..0x00fffffffe -> 0x0200000000
mvebu-pcie soc:pcie:      MEM 0xffffffffffffffff..0x00fffffffe -> 0x0300000000
mvebu-pcie soc:pcie:       IO 0xffffffffffffffff..0x00fffffffe -> 0x0300000000
mvebu-pcie soc:pcie:      MEM 0xffffffffffffffff..0x00fffffffe -> 0x0400000000
mvebu-pcie soc:pcie:       IO 0xffffffffffffffff..0x00fffffffe -> 0x0400000000
mvebu-pcie soc:pcie: resource collision: [mem 0xf1080000-0xf1081fff] conflicts with pcie [mem 0xf1080000-0xf1081fff]
mvebu-pcie: probe of soc:pcie failed with error -16

This results in PCIe being entirely non-functional. At a guess, I'd
say it's due to:

commit c322fa0b3fa948010a278794e60c45ec860e4a1e
Author: Rob Herring <robh at kernel.org>
Date:   Fri May 22 17:48:19 2020 -0600

    PCI: mvebu: Use struct pci_host_bridge.windows list directly

    There's no need to create a temporary resource list and then splice it to
    struct pci_host_bridge.windows list. Just use pci_host_bridge.windows
    directly. The necessary clean-up is already handled by the PCI core.

    Link: https://lore.kernel.org/r/20200522234832.954484-3-robh@kernel.org
    Signed-off-by: Rob Herring <robh at kernel.org>
    Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi at arm.com>
    Cc: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
    Cc: Jason Cooper <jason at lakedaemon.net>

Any suggestions?

-- 
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