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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/pci/controller/pci-host-common.c
..
..
@@ -8,7 +8,9 @@
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  */
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9
 
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 #include <linux/kernel.h>
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+#include <linux/module.h>
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 #include <linux/of_address.h>
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+#include <linux/of_device.h>
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 #include <linux/of_pci.h>
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 #include <linux/pci-ecam.h>
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 #include <linux/platform_device.h>
..
..
@@ -19,67 +21,53 @@
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 }
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 static struct pci_config_window *gen_pci_init(struct device *dev,
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-		struct list_head *resources, struct pci_ecam_ops *ops)
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+		struct pci_host_bridge *bridge, const struct pci_ecam_ops *ops)
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 {
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 	int err;
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 	struct resource cfgres;
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-	struct resource *bus_range = NULL;
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+	struct resource_entry *bus;
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 	struct pci_config_window *cfg;
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-
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-	/* Parse our PCI ranges and request their resources */
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-	err = pci_parse_request_of_pci_ranges(dev, resources, &bus_range);
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-	if (err)
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-		return ERR_PTR(err);
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 	err = of_address_to_resource(dev->of_node, 0, &cfgres);
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32
 	if (err) {
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 		dev_err(dev, "missing \"reg\" property\n");
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-		goto err_out;
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+		return ERR_PTR(err);
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35
 	}
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36
 
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-	cfg = pci_ecam_create(dev, &cfgres, bus_range, ops);
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-	if (IS_ERR(cfg)) {
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-		err = PTR_ERR(cfg);
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-		goto err_out;
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-	}
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+	bus = resource_list_first_type(&bridge->windows, IORESOURCE_BUS);
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+	if (!bus)
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+		return ERR_PTR(-ENODEV);
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40
 
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-	err = devm_add_action(dev, gen_pci_unmap_cfg, cfg);
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-	if (err) {
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-		gen_pci_unmap_cfg(cfg);
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-		goto err_out;
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-	}
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+	cfg = pci_ecam_create(dev, &cfgres, bus->res, ops);
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+	if (IS_ERR(cfg))
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+		return cfg;
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+
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+	err = devm_add_action_or_reset(dev, gen_pci_unmap_cfg, cfg);
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+	if (err)
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+		return ERR_PTR(err);
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+
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49
 	return cfg;
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-
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-err_out:
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-	pci_free_resource_list(resources);
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-	return ERR_PTR(err);
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50
 }
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51
 
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-int pci_host_common_probe(struct platform_device *pdev,
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-			  struct pci_ecam_ops *ops)
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+int pci_host_common_probe(struct platform_device *pdev)
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53
 {
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-	const char *type;
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 	struct device *dev = &pdev->dev;
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-	struct device_node *np = dev->of_node;
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 	struct pci_host_bridge *bridge;
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 	struct pci_config_window *cfg;
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-	struct list_head resources;
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-	int ret;
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+	const struct pci_ecam_ops *ops;
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+
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+	ops = of_device_get_match_data(&pdev->dev);
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+	if (!ops)
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+		return -ENODEV;
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62
 
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 	bridge = devm_pci_alloc_host_bridge(dev, 0);
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64
 	if (!bridge)
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 		return -ENOMEM;
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66
 
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-	type = of_get_property(np, "device_type", NULL);
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-	if (!type || strcmp(type, "pci")) {
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-		dev_err(dev, "invalid \"device_type\" %s\n", type);
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-		return -EINVAL;
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-	}
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-
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 	of_pci_check_probe_only();
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68
 
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 	/* Parse and map our Configuration Space windows */
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-	cfg = gen_pci_init(dev, &resources, ops);
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+	cfg = gen_pci_init(dev, bridge, ops);
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 	if (IS_ERR(cfg))
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 		return PTR_ERR(cfg);
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73
 
..
..
@@ -87,32 +75,26 @@
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 	if (!pci_has_flag(PCI_PROBE_ONLY))
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 		pci_add_flags(PCI_REASSIGN_ALL_BUS);
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77
 
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-	list_splice_init(&resources, &bridge->windows);
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-	bridge->dev.parent = dev;
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 	bridge->sysdata = cfg;
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-	bridge->busnr = cfg->busr.start;
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-	bridge->ops = &ops->pci_ops;
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-	bridge->map_irq = of_irq_parse_and_map_pci;
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-	bridge->swizzle_irq = pci_common_swizzle;
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+	bridge->ops = (struct pci_ops *)&ops->pci_ops;
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80
 
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-	ret = pci_host_probe(bridge);
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-	if (ret < 0) {
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-		pci_free_resource_list(&resources);
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-		return ret;
102
-	}
81
+	platform_set_drvdata(pdev, bridge);
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82
 
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-	platform_set_drvdata(pdev, bridge->bus);
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-	return 0;
83
+	return pci_host_probe(bridge);
106
84
 }
85
+EXPORT_SYMBOL_GPL(pci_host_common_probe);
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86
 
108
87
 int pci_host_common_remove(struct platform_device *pdev)
109
88
 {
110
-	struct pci_bus *bus = platform_get_drvdata(pdev);
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+	struct pci_host_bridge *bridge = platform_get_drvdata(pdev);
111
90
 
112
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 	pci_lock_rescan_remove();
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-	pci_stop_root_bus(bus);
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-	pci_remove_root_bus(bus);
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+	pci_stop_root_bus(bridge->bus);
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+	pci_remove_root_bus(bridge->bus);
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94
 	pci_unlock_rescan_remove();
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95
 
117
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 	return 0;
118
97
 }
98
+EXPORT_SYMBOL_GPL(pci_host_common_remove);
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+
100
+MODULE_LICENSE("GPL v2");