The data field in CAN-FD frames have specifig frame length (0, 1, 2, 3, 4, 5,
6, 7, 8, 12, 16, 20, 24, 32, 48, 64). This function "rounds" up a given length
to the next valid CAN-FD frame length.
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
include/linux/can/length.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/linux/can/length.h b/include/linux/can/length.h
index 156b9d17969a..b2313b2a0b02 100644
--- a/include/linux/can/length.h
+++ b/include/linux/can/length.h
@@ -45,4 +45,10 @@ u8 can_fd_dlc2len(u8 dlc);
/* map the sanitized data length to an appropriate data length code */
u8 can_fd_len2dlc(u8 len);
+/* map the data length to an appropriate data link layer length */
+static inline u8 canfd_sanitize_len(u8 len)
+{
+ return can_fd_dlc2len(can_fd_len2dlc(len));
+}
+
#endif /* !_CAN_LENGTH_H */
--
2.29.2
