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| author |   Yinghai Lu <yinghai@kernel.org> | 2013-05-07 11:06:03 -0600 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2013-05-17 14:12:06 -0600 |
| commit | 3f327e39b4b8f760c331bb2836735be6d83fbf53 (patch) | |
| tree | c2ebbf36764c554c31d82a82a6afb174c8e2b698 /include/linux/pci-acpi.h | |
| parent | Linux 3.10-rc1 (diff) | |
| download | wireguard-linux-3f327e39b4b8f760c331bb2836735be6d83fbf53.tar.xz wireguard-linux-3f327e39b4b8f760c331bb2836735be6d83fbf53.zip | |
PCI: acpiphp: Re-enumerate devices when host bridge receives Bus Check
When a PCI host bridge device receives a Bus Check notification, we
must re-enumerate starting with the bridge to discover changes (devices
that have been added or removed).
Prior to 668192b678 ("PCI: acpiphp: Move host bridge hotplug to
pci_root.c"), this happened in _handle_hotplug_event_bridge(). After that
commit, _handle_hotplug_event_bridge() is not installed for host bridges,
and the host bridge notify handler, _handle_hotplug_event_root() did not
re-enumerate.
This patch adds re-enumeration to _handle_hotplug_event_root().
This fixes cases where we don't notice the addition or removal of
PCI devices, e.g., the PCI-to-USB ExpressCard in the bugzilla below.
[bhelgaas: changelog, references]
Reference: https://lkml.kernel.org/r/CAAh6nkmbKR3HTqm5ommevsBwhL_u0N8Rk7Wsms_LfP=nBgKNew@mail.gmail.com
Reference: https://bugzilla.kernel.org/show_bug.cgi?id=57961
Reported-by: Gavin Guo <tuffkidtt@gmail.com>
Tested-by: Gavin Guo <tuffkidtt@gmail.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
CC: stable@vger.kernel.org # v3.9+
Diffstat (limited to 'include/linux/pci-acpi.h')
| -rw-r--r-- | include/linux/pci-acpi.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/pci-acpi.h b/include/linux/pci-acpi.h index 81b31613eb25..170447977278 100644 --- a/include/linux/pci-acpi.h +++ b/include/linux/pci-acpi.h @@ -60,11 +60,13 @@ static inline void acpi_pci_slot_remove(struct pci_bus *bus) { } void acpiphp_init(void); void acpiphp_enumerate_slots(struct pci_bus *bus, acpi_handle handle); void acpiphp_remove_slots(struct pci_bus *bus); +void acpiphp_check_host_bridge(acpi_handle handle); #else static inline void acpiphp_init(void) { } static inline void acpiphp_enumerate_slots(struct pci_bus *bus, acpi_handle handle) { } static inline void acpiphp_remove_slots(struct pci_bus *bus) { } +static inline void acpiphp_check_host_bridge(acpi_handle handle) { } #endif #else /* CONFIG_ACPI */ |