Hi Yinghai,
I found a little problem in your following patches. :)
[PATCH 00/40] PCI, ACPI, x86: pci root bus hotplug support.
In acpi_is_root_bridge(), it gets device's HID from acpi_device struct.
If the device is not added when the system boots, there will be no
acpi_device for it. And as a result, acpi_is_root_bridge() will fail.
But it doesn't mean that the device is not a root bridge.
In this case, the not-added root bridges have no handle_hotplug_event_root()
callback registerred. And when we hot add it later, it will do nothing.
This patch set changes the acpi_is_root_bridge()'s behavior. When we fail
to get HID from acpi_device, we will get HID from acpi_device_info by
acpi_get_object_info(), which gets the HID from ACPI namespace directly.
So no matter the device is present or not, we will always find out if it
is a pci root bridge, and register a handle_hotplug_event_root() callback
for it.
These patches are based on Lu Yinghai's for-pci-root-bus-hotplug branch.
Tang Chen (3):
Introduce a new acpi to determine HID match.
Do not use acpi_device to find pci root bridge in _init code.
Check exit status of acpi_install_notify_handler() in
find_root_bridges().
drivers/acpi/pci_root.c | 27 ++++++++++++++++++++++-----
drivers/acpi/pci_root_hp.c | 12 +++++++++---
drivers/acpi/scan.c | 24 ++++++++++++++++++++++++
include/acpi/acpi_bus.h | 2 ++
4 files changed, 57 insertions(+), 8 deletions(-)
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