add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/of/dynamic.c
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@@ -63,15 +63,14 @@
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 }
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 EXPORT_SYMBOL_GPL(of_reconfig_notifier_unregister);
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-#ifdef DEBUG
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-const char *action_names[] = {
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+static const char *action_names[] = {
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+	[0] = "INVALID",
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 	[OF_RECONFIG_ATTACH_NODE] = "ATTACH_NODE",
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 	[OF_RECONFIG_DETACH_NODE] = "DETACH_NODE",
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 	[OF_RECONFIG_ADD_PROPERTY] = "ADD_PROPERTY",
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 	[OF_RECONFIG_REMOVE_PROPERTY] = "REMOVE_PROPERTY",
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 	[OF_RECONFIG_UPDATE_PROPERTY] = "UPDATE_PROPERTY",
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 };
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-#endif
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 int of_reconfig_notify(unsigned long action, struct of_reconfig_data *p)
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 {
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@@ -207,11 +206,8 @@
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 	if (!of_node_check_flag(np, OF_OVERLAY)) {
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 		np->name = __of_get_property(np, "name", NULL);
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-		np->type = __of_get_property(np, "device_type", NULL);
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 		if (!np->name)
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 			np->name = "<NULL>";
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-		if (!np->type)
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-			np->type = "<NULL>";
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 		phandle = __of_get_property(np, "phandle", &sz);
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 		if (!phandle)
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@@ -279,7 +275,7 @@
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 	of_node_set_flag(np, OF_DETACHED);
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 	/* race with of_find_node_by_phandle() prevented by devtree_lock */
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-	__of_free_phandle_cache_entry(np->phandle);
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+	__of_phandle_cache_inv_entry(np->phandle);
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 }
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 /**
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@@ -289,7 +285,6 @@
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 {
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 	struct of_reconfig_data rd;
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 	unsigned long flags;
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-	int rc = 0;
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 	memset(&rd, 0, sizeof(rd));
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 	rd.dn = np;
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@@ -304,7 +299,7 @@
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 	of_reconfig_notify(OF_RECONFIG_DETACH_NODE, &rd);
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-	return rc;
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+	return 0;
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 }
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 EXPORT_SYMBOL_GPL(of_detach_node);
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@@ -360,6 +355,7 @@
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 	property_list_free(node->properties);
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 	property_list_free(node->deadprops);
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+	fwnode_links_purge(of_fwnode_handle(node));
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 	kfree(node->full_name);
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 	kfree(node->data);
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@@ -593,21 +589,9 @@
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 		}
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 		ret = __of_add_property(ce->np, ce->prop);
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-		if (ret) {
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-			pr_err("changeset: add_property failed @%pOF/%s\n",
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-				ce->np,
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-				ce->prop->name);
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-			break;
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-		}
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 		break;
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 	case OF_RECONFIG_REMOVE_PROPERTY:
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 		ret = __of_remove_property(ce->np, ce->prop);
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-		if (ret) {
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-			pr_err("changeset: remove_property failed @%pOF/%s\n",
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-				ce->np,
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-				ce->prop->name);
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-			break;
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-		}
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 		break;
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 	case OF_RECONFIG_UPDATE_PROPERTY:
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@@ -621,20 +605,17 @@
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 		}
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 		ret = __of_update_property(ce->np, ce->prop, &old_prop);
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-		if (ret) {
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-			pr_err("changeset: update_property failed @%pOF/%s\n",
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-				ce->np,
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-				ce->prop->name);
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-			break;
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-		}
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 		break;
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 	default:
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 		ret = -EINVAL;
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 	}
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 	raw_spin_unlock_irqrestore(&devtree_lock, flags);
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-	if (ret)
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+	if (ret) {
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+		pr_err("changeset: apply failed: %-15s %pOF:%s\n",
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+		       action_names[ce->action], ce->np, ce->prop->name);
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 		return ret;
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+	}
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 	switch (ce->action) {
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 	case OF_RECONFIG_ATTACH_NODE:
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@@ -913,6 +894,9 @@
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 {
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 	struct of_changeset_entry *ce;
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+	if (WARN_ON(action >= ARRAY_SIZE(action_names)))
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+		return -EINVAL;
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+
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 	ce = kzalloc(sizeof(*ce), GFP_KERNEL);
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 	if (!ce)
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 		return -ENOMEM;