diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index ee7bbd9d1151201b38ac3628dced891a81cab216..376a5d606acc66c26958ced6f61aa887448c8e3c 100644
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -233,7 +233,8 @@
 /* Common FIFO bits */
 
 /* RSCFDnCFDCFCCk */
-#define RCANFD_CFCC_CFTML(gpriv, x)	(((x) & 0xf) << reg_gen4(gpriv, 16, 20))
+#define RCANFD_CFCC_CFTML(gpriv, x)	\
+	(((x) & reg_gen4(gpriv, 0x1f, 0xf)) << reg_gen4(gpriv, 16, 20))
 #define RCANFD_CFCC_CFM(gpriv, x)	(((x) & 0x3) << reg_gen4(gpriv,  8, 16))
 #define RCANFD_CFCC_CFIM		BIT(12)
 #define RCANFD_CFCC_CFDC(gpriv, x)	(((x) & 0x7) << reg_gen4(gpriv, 21,  8))