[RFC v4 2/7] PCI: Allow msi domain set-up at host probing time
From: Boqun Feng <hidden>
Date: 2021-07-14 10:29:37
Also in:
linux-hyperv, linux-pci, lkml
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
For GENERIC_MSI_IRQ_DOMAIN drivers, we can set up the msi domain via dev_set_msi_domain() at probing time, and drivers can use this more generic way to set up the msi domain for the host bridge. This is the preparation for ARM64 Hyper-V PCI support. Originally-by: Arnd Bergmann [off-list ref] Signed-off-by: Boqun Feng <redacted> --- drivers/pci/probe.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 60c50d4f156f..539b5139e376 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c@@ -829,11 +829,14 @@ static struct irq_domain *pci_host_bridge_msi_domain(struct pci_bus *bus) { struct irq_domain *d; + /* Default set by host bridge driver */ + d = dev_get_msi_domain(bus->bridge); /* * Any firmware interface that can resolve the msi_domain * should be called from here. */ - d = pci_host_bridge_of_msi_domain(bus); + if (!d) + d = pci_host_bridge_of_msi_domain(bus); if (!d) d = pci_host_bridge_acpi_msi_domain(bus);
--
2.30.2
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel