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authorJean-Philippe Brucker <>2021-05-10 19:31:30 +0200
committerBjorn Helgaas <>2021-05-25 18:37:37 -0500
commit85aabbd7b315c65673084b6227bee92c00405239 (patch)
tree63b2c9b396ffd828691891afcc552163f46edfe9 /MAINTAINERS
parent2ee4c8a268764e751ee44dfffa76c813cfc27aee (diff)
PCI/MSI: Fix MSIs for generic hosts that use device-tree's "msi-map"
Since commit 9ec37efb8783 ("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: 9ec37efb8783 ("PCI/MSI: Make pci_host_common_probe() declare its reliance on MSI domains") Link: Signed-off-by: Jean-Philippe Brucker <> Signed-off-by: Bjorn Helgaas <> Acked-by: Marc Zyngier <>
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