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[ Upstream commit370d988cc5] In the function softing_startstop() the variable error_reporting is assigned but not used. The code that uses this variable is commented out. Its stated that the functionality is not finally verified. To fix the warning: | drivers/net/can/softing/softing_fw.c:424:9: error: variable 'error_reporting' set but not used [-Werror,-Wunused-but-set-variable] remove the comment, activate the code, but add a "0 &&" to the if expression and rely on the optimizer rather than the preprocessor to remove the code. Link: https://lore.kernel.org/all/20220109103126.1872833-1-mkl@pengutronix.de Fixes:03fd3cf5a1("can: add driver for Softing card") Cc: Kurt Van Dijck <dev.kurt@vandijck-laurijssen.be> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sasha Levin <sashal@kernel.org>