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When storing device-level data, wdev_set_data() spread the entire wdev object into handler_data. Since handler_config.data is set from the previous handler_data[wdev.name] before each setup, this created exponentially growing nesting with each reload, eventually causing "nesting too deep" JSON parse errors. Fix by initializing cur to a simple object containing only the device name instead of the entire wdev object. Signed-off-by: Felix Fietkau <nbd@nbd.name>