add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/media/v4l2-core/v4l2-fwnode.c
..
..
@@ -572,19 +572,29 @@
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 	link->local_id = fwep.id;
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 	link->local_port = fwep.port;
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 	link->local_node = fwnode_graph_get_port_parent(fwnode);
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+	if (!link->local_node)
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+		return -ENOLINK;
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 	fwnode = fwnode_graph_get_remote_endpoint(fwnode);
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-	if (!fwnode) {
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-		fwnode_handle_put(fwnode);
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-		return -ENOLINK;
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-	}
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+	if (!fwnode)
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+		goto err_put_local_node;
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 	fwnode_graph_parse_endpoint(fwnode, &fwep);
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 	link->remote_id = fwep.id;
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 	link->remote_port = fwep.port;
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 	link->remote_node = fwnode_graph_get_port_parent(fwnode);
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+	if (!link->remote_node)
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+		goto err_put_remote_endpoint;
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 	return 0;
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+
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+err_put_remote_endpoint:
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+	fwnode_handle_put(fwnode);
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+
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+err_put_local_node:
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+	fwnode_handle_put(link->local_node);
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+
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+	return -ENOLINK;
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 }
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 EXPORT_SYMBOL_GPL(v4l2_fwnode_parse_link);
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