--- zzzz-none-000/linux-3.10.107/drivers/pci/hotplug/shpchp_pci.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/pci/hotplug/shpchp_pci.c	2021-02-04 17:41:59.000000000 +0000
@@ -34,48 +34,47 @@
 #include "../pci.h"
 #include "shpchp.h"
 
-int __ref shpchp_configure_device(struct slot *p_slot)
+int shpchp_configure_device(struct slot *p_slot)
 {
 	struct pci_dev *dev;
 	struct controller *ctrl = p_slot->ctrl;
 	struct pci_dev *bridge = ctrl->pci_dev;
 	struct pci_bus *parent = bridge->subordinate;
-	int num;
+	int num, ret = 0;
+
+	pci_lock_rescan_remove();
 
 	dev = pci_get_slot(parent, PCI_DEVFN(p_slot->device, 0));
 	if (dev) {
-		ctrl_err(ctrl, "Device %s already exists "
-			 "at %04x:%02x:%02x, cannot hot-add\n", pci_name(dev),
-			 pci_domain_nr(parent), p_slot->bus, p_slot->device);
+		ctrl_err(ctrl, "Device %s already exists at %04x:%02x:%02x, cannot hot-add\n",
+			 pci_name(dev), pci_domain_nr(parent),
+			 p_slot->bus, p_slot->device);
 		pci_dev_put(dev);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto out;
 	}
 
 	num = pci_scan_slot(parent, PCI_DEVFN(p_slot->device, 0));
 	if (num == 0) {
 		ctrl_err(ctrl, "No new device found\n");
-		return -ENODEV;
+		ret = -ENODEV;
+		goto out;
 	}
 
 	list_for_each_entry(dev, &parent->devices, bus_list) {
 		if (PCI_SLOT(dev->devfn) != p_slot->device)
 			continue;
-		if ((dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) ||
-		    (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS))
+		if (pci_is_bridge(dev))
 			pci_hp_add_bridge(dev);
 	}
 
 	pci_assign_unassigned_bridge_resources(bridge);
-
-	list_for_each_entry(dev, &parent->devices, bus_list) {
-		if (PCI_SLOT(dev->devfn) != p_slot->device)
-			continue;
-		pci_configure_slot(dev);
-	}
-
+	pcie_bus_configure_settings(parent);
 	pci_bus_add_devices(parent);
 
-	return 0;
+ out:
+	pci_unlock_rescan_remove();
+	return ret;
 }
 
 int shpchp_unconfigure_device(struct slot *p_slot)
@@ -89,6 +88,8 @@
 	ctrl_dbg(ctrl, "%s: domain:bus:dev = %04x:%02x:%02x\n",
 		 __func__, pci_domain_nr(parent), p_slot->bus, p_slot->device);
 
+	pci_lock_rescan_remove();
+
 	list_for_each_entry_safe(dev, temp, &parent->devices, bus_list) {
 		if (PCI_SLOT(dev->devfn) != p_slot->device)
 			continue;
@@ -108,6 +109,8 @@
 		pci_stop_and_remove_bus_device(dev);
 		pci_dev_put(dev);
 	}
+
+	pci_unlock_rescan_remove();
 	return rc;
 }