1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index cdc2f83c11c5..62d45a76f663 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2735,3 +2735,26 @@ void __init pci_sort_breadthfirst(void)
 {
 	bus_sort_breadthfirst(&pci_bus_type, &pci_sort_bf_cmp);
 }
+
+int pci_hp_add_bridge(struct pci_dev *dev)
+{
+	struct pci_bus *parent = dev->bus;
+	int pass, busnr, start = parent->busn_res.start;
+	int end = parent->busn_res.end;
+
+	for (busnr = start; busnr <= end; busnr++) {
+		if (!pci_find_bus(pci_domain_nr(parent), busnr))
+			break;
+	}
+	if (busnr-- > end) {
+		dev_err(&dev->dev, "No bus number available for hot-added bridge\n");
+		return -1;
+	}
+	for (pass = 0; pass < 2; pass++)
+		busnr = pci_scan_bridge(parent, dev, busnr, pass);
+	if (!dev->subordinate)
+		return -1;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pci_hp_add_bridge);