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Usually the received CAN frames can be processed/routed as much as 'max_hops' times (which is given at module load time of the can-gw module). Introduce a new configuration option to reduce the number of possible hops for a specific gateway rule to a value smaller then max_hops. Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>