|author||Jean-Philippe Brucker <email@example.com>||2021-05-10 19:31:30 +0200|
|committer||Bjorn Helgaas <firstname.lastname@example.org>||2021-05-25 18:37:37 -0500|
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 , 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.  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: https://email@example.com Signed-off-by: Jean-Philippe Brucker <firstname.lastname@example.org> Signed-off-by: Bjorn Helgaas <email@example.com> Acked-by: Marc Zyngier <firstname.lastname@example.org>
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