Devices under hot-added hostbridge have no chance to assign resources
and to configure them, so this patch adds such code for hot-added
hostbridges at acpi_pci_root_start().
Signed-off-by: Taku Izumi <izumi.taku@xxxxxxxxxxxxxx>
---
drivers/acpi/pci_root.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
Index: linux/drivers/acpi/pci_root.c
===================================================================
--- linux.orig/drivers/acpi/pci_root.c
+++ linux/drivers/acpi/pci_root.c
@@ -38,6 +38,7 @@
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <acpi/apei.h>
+#include <linux/pci_hotplug.h>
#define PREFIX "ACPI: "
@@ -644,6 +645,19 @@ end:
static int acpi_pci_root_start(struct acpi_device *device)
{
struct acpi_pci_root *root = acpi_driver_data(device);
+ struct pci_dev *pdev;
+
+ /*
+ * Devices under hot-added hostbridge have no chance to assign
+ * resources and to configure them, so do that here
+ */
+ if (system_state != SYSTEM_BOOTING) {
+ pci_bus_size_bridges(root->bus);
+ pci_bus_assign_resources(root->bus);
+ list_for_each_entry(pdev, &root->bus->devices, bus_list)
+ pci_configure_slot(pdev);
+ pci_enable_bridges(root->bus);
+ }
pci_bus_add_devices(root->bus);
return 0;
--
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