human
Solve the following python programming problem given the following code:
def register_cffi_updates(model) : 
    def visit_models(m) : 
        if hasattr (m, '_cffi_update') : 
            for (port, func_ptr) in m._cffi_update.items () : 
                signal_value = port._signalvalue 
                signal_value.register_slice (func_ptr) 
else : 
            for subm in m.get_submodules () : 
                visit_models (subm) 
visit_models (visit_models) 

    
    

    Fix the buggy line: visit_models (visit_models)
assistant
#Here is Python program to fix the buggy line: visit_models (visit_models)
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visit_models (model)