[RFC v2 6/7] PCI: arm64: Allow pci_config_window::parent to be NULL
flat view
STALE1997d
SUPERSEDED
From: Boqun Feng <hidden>
Date: 2021-05-03 14:48:07
Also in:
linux-arm-kernel, linux-mips, linux-pci, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Status: Superseded by v6 (posted 2021-07-26). [go to v6]
Revision v2 (5 revisions archived).
Revisions (5)
This is purely a hack, for ARM64 Hyper-V guest, there is no
corresponding ACPI device for the root bridge, so the best we can
provide is an all-zeroed pci_config_window, and in this case make
pcibios_root_bridge_prepare() act as the ACPI device is NULL.
Signed-off-by: Boqun Feng <redacted>
---
arch/arm64/kernel/pci.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/kernel/pci.c b/arch/arm64/kernel/pci.c
index e9a6eeb6a694..f159df903ccb 100644
--- a/arch/arm64/kernel/pci.c
+++ b/arch/arm64/kernel/pci.c@@ -83,7 +83,7 @@ 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 acpi_device *adev = cfg->parent ? to_acpi_device(cfg->parent) : NULL; struct device *bus_dev = &bridge->bus->dev; ACPI_COMPANION_SET(&bridge->dev, adev);
--
2.30.2