diff options
| author | Jean-Philippe Brucker <[email protected]> | 2021-05-10 17:31:30 +0000 |
|---|---|---|
| committer | Bjorn Helgaas <[email protected]> | 2021-05-25 23:37:37 +0000 |
| commit | 85aabbd7b315c65673084b6227bee92c00405239 (patch) | |
| tree | 63b2c9b396ffd828691891afcc552163f46edfe9 /tools/lib/bpf/bpf_prog_linfo.c | |
| parent | MAINTAINERS: Add Krzysztof as PCI host/endpoint controllers reviewer (diff) | |
| download | kernel-85aabbd7b315c65673084b6227bee92c00405239.tar.gz kernel-85aabbd7b315c65673084b6227bee92c00405239.zip | |
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: 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]>
Diffstat (limited to 'tools/lib/bpf/bpf_prog_linfo.c')
0 files changed, 0 insertions, 0 deletions