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ACPI: PCI: PM: Rework root bus notification setup

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Since pci_acpi_add_bus_pm_notifier() is only suitable for adding ACPI
PM notifiers to root buses, rename it to pci_acpi_add_root_pm_notifier()
and modify it to take an additional "root" argument, which is then used
for passing a PCI root bridge device pointer to acpi_add_pm_notifier().

That function uses it to populate the "dev" field in the context
structure attached to the ACPI device object that will receive the
ACPI "wake" notifications on behalf of the given PCI root bus.  The
context structure in question is passed to pci_acpi_wake_bus(), so
the latter can be simplified quite a bit now because the target PCI
host bridge structure address can be derived from "dev".

No intentional functional impact.

This change will also facilitate a subsequent update related to the
registration of wakeup sources.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Armin Wolf <W_Armin@gmx.de>
[ rjw: Kerneldoc comment fixup ]
Link: https://patch.msgid.link/2395263.ElGaqSPkdT@rafael.j.wysocki
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki
2025-12-15 13:48:14 +01:00
parent 8f0b4cce44
commit d8a872c810
3 changed files with 9 additions and 11 deletions
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3
include/linux/pci-acpi.h
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@@ -12,7 +12,8 @@
#include <linux/acpi.h>
#ifdef CONFIG_ACPI
extern acpi_status pci_acpi_add_bus_pm_notifier(struct acpi_device *dev);
extern acpi_status pci_acpi_add_root_pm_notifier(struct acpi_device *dev,
struct acpi_pci_root *pci_root);
static inline acpi_status pci_acpi_remove_bus_pm_notifier(struct acpi_device *dev)
{
return acpi_remove_pm_notifier(dev);