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authorJiang Liu <liuj97@gmail.com>2013-04-12 05:44:21 +0000
committerBjorn Helgaas <bhelgaas@google.com>2013-04-12 15:38:25 -0600
commit5090d4a6a1f150ec593ac5f2a755b5a3e878b21e (patch)
treeb39f836c2683336289e80a503d947528616d658e /drivers/pci/pci-acpi.c
parent10a9574756201fbbdd0cac11f370f00d3d02bfa1 (diff)
PCI/ACPI: Prepare stub functions to handle ACPI PCI (hotplug) slots
Prepare two stub functions to handle ACPI PCI slots and ACPI PCI hotplug slots, which will be invoked by the PCI core when creating/destroying PCI buses. It will be used to get rid of ACPI PCI subdrivers for pci_slot and acpiphp, and eventually remove the ACPI PCI subdriver mechanism. And it will also be used to handle ACPI PCI (hotplug) slots in a unified way, both at boot time and for PCI hotplug operations. Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Yinghai Lu <yinghai@kernel.org> Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> Cc: Toshi Kani <toshi.kani@hp.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Myron Stowe <myron.stowe@redhat.com>
Diffstat (limited to 'drivers/pci/pci-acpi.c')
-rw-r--r--drivers/pci/pci-acpi.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index dee5dddaa292..b8b8437c703e 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -287,6 +287,30 @@ static struct pci_platform_pm_ops acpi_pci_platform_pm = {
.run_wake = acpi_pci_run_wake,
};
+void acpi_pci_add_bus(struct pci_bus *bus)
+{
+ acpi_handle handle = NULL;
+
+ if (bus->bridge)
+ handle = ACPI_HANDLE(bus->bridge);
+ if (acpi_pci_disabled || handle == NULL)
+ return;
+
+ /* TODO: add PCI slots and acpiphp hotplug slots */
+}
+
+void acpi_pci_remove_bus(struct pci_bus *bus)
+{
+ /*
+ * bus->bridge->acpi_node.handle has already been reset to NULL
+ * when acpi_pci_remove_bus() is called, so don't check ACPI handle.
+ */
+ if (acpi_pci_disabled)
+ return;
+
+ /* TODO: remove PCI slots and acpiphp hotplug slots */
+}
+
/* ACPI bus type */
static int acpi_pci_find_device(struct device *dev, acpi_handle *handle)
{