From: Boqun Feng <boqun.feng@gmail.com>
To: Bjorn Helgaas <bhelgaas@google.com>,
Arnd Bergmann <arnd@arndb.de>, Marc Zyngier <maz@kernel.org>
Cc: "Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will@kernel.org>,
"K. Y. Srinivasan" <kys@microsoft.com>,
"Haiyang Zhang" <haiyangz@microsoft.com>,
"Stephen Hemminger" <sthemmin@microsoft.com>,
"Wei Liu" <wei.liu@kernel.org>,
"Dexuan Cui" <decui@microsoft.com>,
"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
linux-pci@vger.kernel.org,
"Sunil Muthuswamy" <sunilmut@microsoft.com>,
"Mike Rapoport" <rppt@kernel.org>
Subject: [RFC v5 3/8] arm64: PCI: Restructure pcibios_root_bridge_prepare()
Date: Tue, 20 Jul 2021 21:44:24 +0800 [thread overview]
Message-ID: <20210720134429.511541-4-boqun.feng@gmail.com> (raw)
In-Reply-To: <20210720134429.511541-1-boqun.feng@gmail.com>
Restructure the pcibios_root_bridge_prepare() as the preparation for
supporting cases when no real ACPI device is related to the PCI host
bridge.
No functional change.
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
---
arch/arm64/kernel/pci.c | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
index 1006ed2d7c60..5148ae242780 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c
@@ -82,14 +82,19 @@ int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
{
- if (!acpi_disabled) {
- struct pci_config_window *cfg = bridge->bus->sysdata;
- struct acpi_device *adev = to_acpi_device(cfg->parent);
- struct device *bus_dev = &bridge->bus->dev;
+ struct pci_config_window *cfg;
+ struct acpi_device *adev;
+ struct device *bus_dev;
- ACPI_COMPANION_SET(&bridge->dev, adev);
- set_dev_node(bus_dev, acpi_get_node(acpi_device_handle(adev)));
- }
+ if (acpi_disabled)
+ return 0;
+
+ cfg = bridge->bus->sysdata;
+ adev = to_acpi_device(cfg->parent);
+ bus_dev = &bridge->bus->dev;
+
+ ACPI_COMPANION_SET(&bridge->dev, adev);
+ set_dev_node(bus_dev, acpi_get_node(acpi_device_handle(adev)));
return 0;
}
--
2.30.2
next prev parent reply other threads:[~2021-07-20 13:59 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-20 13:44 [RFC v5 0/8] PCI: hv: Support host bridge probing on ARM64 Boqun Feng
2021-07-20 13:44 ` [RFC v5 1/8] PCI: Introduce domain_nr in pci_host_bridge Boqun Feng
2021-07-20 22:49 ` Bjorn Helgaas
2021-07-21 0:57 ` Boqun Feng
2021-07-20 13:44 ` [RFC v5 2/8] PCI: Support populating MSI domains of root buses via bridges Boqun Feng
2021-07-20 13:44 ` Boqun Feng [this message]
2021-07-20 13:44 ` [RFC v5 4/8] arm64: PCI: Support root bridge preparation for Hyper-V Boqun Feng
2021-07-20 13:44 ` [RFC v5 5/8] PCI: hv: Generify PCI probing Boqun Feng
2021-07-20 13:44 ` [RFC v5 6/8] PCI: hv: Set ->domain_nr of pci_host_bridge at probing time Boqun Feng
2021-07-20 13:44 ` [RFC v5 7/8] PCI: hv: Set up MSI domain at bridge " Boqun Feng
2021-07-20 13:44 ` [RFC v5 8/8] PCI: hv: Turn on the host bridge probing on ARM64 Boqun Feng
2021-07-20 14:38 ` Marc Zyngier
2021-07-20 14:59 ` Boqun Feng
2021-07-20 15:53 ` Marc Zyngier
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