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Jean-Philippe Brucker
85aabbd7b3
Since commit9ec37efb87("PCI/MSI: Make pci_host_common_probe() declare its reliance on MSI domains"), platforms that rely on the "msi-map" device-tree property don't get MSIs anymore. On the Arm Fast Model for example [1], the host bridge doesn't have a "msi-parent" property since it doesn't itself generate MSIs, and so doesn't get a MSI domain. It has an "msi-map" property instead to describe MSI controllers of child devices. As a result, due to the new msi_domain check in pci_register_host_bridge(), the whole bus gets PCI_BUS_FLAGS_NO_MSI. Check whether the root complex has an "msi-map" property before giving up on MSIs. [1] arch/arm64/boot/dts/arm/fvp-base-revc.dts Fixes:9ec37efb87("PCI/MSI: Make pci_host_common_probe() declare its reliance on MSI domains") Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jean-Philippe Brucker <[email protected]> Signed-off-by: Bjorn Helgaas <[email protected]> Acked-by: Marc Zyngier <[email protected]>