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The PSR register contains among other the error for the CAN arbitration phase (LEC bits) and CAN data phase (DLEC bits). Prepare is_lec_err() to be called with the (D)LEC value only instead of the whole PSR register. While there rename LEC_UNUSED to LEC_NO_CHANGE to match the latest M_CAN reference manual. Link: https://lore.kernel.org/all/20221019211611.1605764-1-mkl@pengutronix.de Reviewed-by: Chandrasekar Ramakrishnan <rcsekar@samsung.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>