From: Jiang Liu <jiang....@huawei.com>
When hot-plugging PCI root bridge, acpi_pci_drivers' add()/remove()
methods should be invoked to notify registered drivers.
-v2: Move add calling to acpi_pci_root_start - Yinghai
-v3: use acpi_pci_root pointer instead of handle - Yinghai
-v3: Fold stop ioapic/iommu drivers after pci devices change in. - Yinghai
Signed-off-by: Jiang Liu <jiang....@huawei.com>
Signed-off-by: Yinghai Lu <ying...@kernel.org>
---
drivers/acpi/pci_root.c | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 325cf5c..0ea5ad0 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -633,6 +633,11 @@ end:
static int acpi_pci_root_start(struct acpi_device *device)
{
struct acpi_pci_root *root = acpi_driver_data(device);
+ struct acpi_pci_driver *driver;
+
+ list_for_each_entry(driver, &acpi_pci_drivers, node)
+ if (driver->add)
+ driver->add(root);
pci_bus_add_devices(root->bus);
return 0;
@@ -643,6 +648,7 @@ static int acpi_pci_root_remove(struct acpi_device *device,
int type)
acpi_status status;
acpi_handle handle;
struct acpi_pci_root *root = acpi_driver_data(device);
+ struct acpi_pci_driver *driver;
/* that root bus could be removed already */
if (!pci_find_bus(root->segment, root->secondary.start)) {
@@ -651,8 +657,13 @@ static int acpi_pci_root_remove(struct acpi_device
*device, int type)
goto out;
}
+ /* stop normal pci drivers before we stop ioapic and dmar etc */
pci_stop_root_bus(root->bus);
+ list_for_each_entry_reverse(driver, &acpi_pci_drivers, node)
+ if (driver->remove)
+ driver->remove(root);
+
device_set_run_wake(root->bus->bridge, false);
pci_acpi_remove_bus_pm_notifier(device);
--
1.7.7
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