From: Dong Aisheng <b29396@freescale.com>
Date: Fri, 7 Nov 2014 08:45:12 +0000 (+0800)
Subject: can: dev: add can_is_canfd_skb() API
X-Git-Tag: submit/tizen/20160607.132125~3522^2~11^2~14
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=98e69016a11b2b9398bea668442193b3b362cd43;p=sdk%2Femulator%2Femulator-kernel.git

can: dev: add can_is_canfd_skb() API

The CAN device drivers can use can_is_canfd_skb() to check if the frame to send
is on CAN FD mode or normal CAN mode.

Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Dong Aisheng <b29396@freescale.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---

diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h
index 6992afc..b37ea95 100644
--- a/include/linux/can/dev.h
+++ b/include/linux/can/dev.h
@@ -99,6 +99,12 @@ inval_skb:
 	return 1;
 }
 
+static inline bool can_is_canfd_skb(const struct sk_buff *skb)
+{
+	/* the CAN specific type of skb is identified by its data length */
+	return skb->len == CANFD_MTU;
+}
+
 /* get data length from can_dlc with sanitized can_dlc */
 u8 can_dlc2len(u8 can_dlc);