CONFIG_PCIEASPM breaks PCIe on Marvell Armada 385 machine

[Andrew Lunn]

>   pci_bus 0000:00: root bus resource [mem 0xe0000000-0xe7ffffff]
>   pci 0000:02:00.0: reg 0x10: [mem 0xe8000000-0xe81fffff 64bit]
>   pci 0000:02:00.0: reg 0x30: [mem 0xe8200000-0xe820ffff pref]
>   pci 0000:02:00.0: of_irq_parse_pci() failed with rc=134
>   pci 0000:02:00.0: BAR 0: assigned [mem 0xe0000000-0xe01fffff 64bit]
>   pci 0000:02:00.0: BAR 0: error updating (0xe0000004 != 0xffffffff)
>   pci 0000:02:00.0: BAR 0: error updating (high 0x000000 != 0xffffffff)
> 
> 3) No idea what the of_irq_parse_pci() issue is.

134 is 0x86.

Could it be:

#define PCIBIOS_DEVICE_NOT_FOUND        0x86

pci-mvebu.c will return this in a few places, mvebu_pcie_wr_conf(),
mvebu_pcie_rd_conf().

Could this be

rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin);

It looks like pci_read_config_byte() is expected to return a real
errno value, and maybe it is returning PCIBIOS_DEVICE_NOT_FOUND?

      Andrew