1 files changed, 6 insertions, 81 deletions

diff --git a/drivers/pci/host/pci-host-common.c b/drivers/pci/host/pci-host-common.c
index 44a47d4..5d028f5 100644
--- a/drivers/pci/host/pci-host-common.c
+++ b/drivers/pci/host/pci-host-common.c
@@ -1,18 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Generic PCI host driver common code
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
  * Copyright (C) 2014 ARM Limited
  *
  * Author: Will Deacon <will.deacon@arm.com>
@@ -24,50 +13,6 @@
 #include <linux/pci-ecam.h>
 #include <linux/platform_device.h>
 
-static int gen_pci_parse_request_of_pci_ranges(struct device *dev,
-		       struct list_head *resources, struct resource **bus_range)
-{
-	int err, res_valid = 0;
-	struct device_node *np = dev->of_node;
-	resource_size_t iobase;
-	struct resource_entry *win, *tmp;
-
-	err = of_pci_get_host_bridge_resources(np, 0, 0xff, resources, &iobase);
-	if (err)
-		return err;
-
-	err = devm_request_pci_bus_resources(dev, resources);
-	if (err)
-		return err;
-
-	resource_list_for_each_entry_safe(win, tmp, resources) {
-		struct resource *res = win->res;
-
-		switch (resource_type(res)) {
-		case IORESOURCE_IO:
-			err = pci_remap_iospace(res, iobase);
-			if (err) {
-				dev_warn(dev, "error %d: failed to map resource %pR\n",
-					 err, res);
-				resource_list_destroy_entry(win);
-			}
-			break;
-		case IORESOURCE_MEM:
-			res_valid |= !(res->flags & IORESOURCE_PREFETCH);
-			break;
-		case IORESOURCE_BUS:
-			*bus_range = res;
-			break;
-		}
-	}
-
-	if (res_valid)
-		return 0;
-
-	dev_err(dev, "non-prefetchable memory resource required\n");
-	return -EINVAL;
-}
-
 static void gen_pci_unmap_cfg(void *ptr)
 {
 	pci_ecam_free((struct pci_config_window *)ptr);
@@ -82,9 +27,9 @@ static struct pci_config_window *gen_pci_init(struct device *dev,
 	struct pci_config_window *cfg;
 
 	/* Parse our PCI ranges and request their resources */
-	err = gen_pci_parse_request_of_pci_ranges(dev, resources, &bus_range);
+	err = pci_parse_request_of_pci_ranges(dev, resources, &bus_range);
 	if (err)
-		goto err_out;
+		return ERR_PTR(err);
 
 	err = of_address_to_resource(dev->of_node, 0, &cfgres);
 	if (err) {
@@ -116,7 +61,6 @@ int pci_host_common_probe(struct platform_device *pdev,
 	const char *type;
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
-	struct pci_bus *bus, *child;
 	struct pci_host_bridge *bridge;
 	struct pci_config_window *cfg;
 	struct list_head resources;
@@ -135,14 +79,13 @@ int pci_host_common_probe(struct platform_device *pdev,
 	of_pci_check_probe_only();
 
 	/* Parse and map our Configuration Space windows */
-	INIT_LIST_HEAD(&resources);
 	cfg = gen_pci_init(dev, &resources, ops);
 	if (IS_ERR(cfg))
 		return PTR_ERR(cfg);
 
 	/* Do not reassign resources if probe only */
 	if (!pci_has_flag(PCI_PROBE_ONLY))
-		pci_add_flags(PCI_REASSIGN_ALL_RSRC | PCI_REASSIGN_ALL_BUS);
+		pci_add_flags(PCI_REASSIGN_ALL_BUS);
 
 	list_splice_init(&resources, &bridge->windows);
 	bridge->dev.parent = dev;
@@ -152,29 +95,11 @@ int pci_host_common_probe(struct platform_device *pdev,
 	bridge->map_irq = of_irq_parse_and_map_pci;
 	bridge->swizzle_irq = pci_common_swizzle;
 
-	ret = pci_scan_root_bus_bridge(bridge);
+	ret = pci_host_probe(bridge);
 	if (ret < 0) {
-		dev_err(dev, "Scanning root bridge failed");
+		pci_free_resource_list(&resources);
 		return ret;
 	}
 
-	bus = bridge->bus;
-
-	/*
-	 * We insert PCI resources into the iomem_resource and
-	 * ioport_resource trees in either pci_bus_claim_resources()
-	 * or pci_bus_assign_resources().
-	 */
-	if (pci_has_flag(PCI_PROBE_ONLY)) {
-		pci_bus_claim_resources(bus);
-	} else {
-		pci_bus_size_bridges(bus);
-		pci_bus_assign_resources(bus);
-
-		list_for_each_entry(child, &bus->children, node)
-			pcie_bus_configure_settings(child);
-	}
-
-	pci_bus_add_devices(bus);
 	return 0;
 }