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Message-Id: <20210113211410.917108-11-mkl@pengutronix.de>
Date: Wed, 13 Jan 2021 22:14:03 +0100
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net, kuba@...nel.org, linux-can@...r.kernel.org,
kernel@...gutronix.de, Marc Kleine-Budde <mkl@...gutronix.de>,
Vincent Mailhol <mailhol.vincent@...adoo.fr>
Subject: [net-next 10/17] can: length: canfd_sanitize_len(): add function to sanitize CAN-FD data length
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.
Reviewed-by: Vincent Mailhol <mailhol.vincent@...adoo.fr>
Link: https://lore.kernel.org/r/20210111141930.693847-10-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
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
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