get_function_key
u32 function = get_function_key(dev, func_vhca_id, ec_function);
u32 function = get_function_key(dev, func_vhca_id, ec_function);
get_function_key(dev, func_vhca_id, ec_function));
u32 function = get_function_key(dev, func_vhca_id, ec_function);