linux-kernel - [RFC PATCH v3 03/17] PCI: Make pci_create_root_bus() declare its reliance on MSI domains

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Message-Id: <20231219174526.2235150-4-sunilvl@ventanamicro.com>
Date: Tue, 19 Dec 2023 23:15:12 +0530
From: Sunil V L <sunilvl@...tanamicro.com>
To: linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	linux-acpi@...r.kernel.org,
	linux-pci@...r.kernel.org
Cc: Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	"Rafael J . Wysocki" <rafael@...nel.org>,
	Len Brown <lenb@...nel.org>,
	Anup Patel <anup@...infault.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Haibo Xu <haibo1.xu@...el.com>,
	Conor Dooley <conor.dooley@...rochip.com>,
	Andrew Jones <ajones@...tanamicro.com>,
	Björn Töpel <bjorn@...nel.org>,
	Marc Zyngier <maz@...nel.org>,
	Sunil V L <sunilvl@...tanamicro.com>
Subject: [RFC PATCH v3 03/17] PCI: Make pci_create_root_bus() declare its reliance on MSI domains

Similar to [1], declare this dependency for PCI probe in ACPI based
flow.

This is required especially for RISC-V platforms where MSI controller
can be absent.

[1] - https://lore.kernel.org/all/20210330151145.997953-12-maz@kernel.org/

Signed-off-by: Sunil V L <sunilvl@...tanamicro.com>
---
 drivers/pci/probe.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 795534589b98..9e941cf55d87 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -3054,6 +3054,7 @@ struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
 	bridge->sysdata = sysdata;
 	bridge->busnr = bus;
 	bridge->ops = ops;
+	bridge->msi_domain = true;
 
 	error = pci_register_host_bridge(bridge);
 	if (error < 0)
-- 
2.39.2