can_put_echo_skb will clone skb then free the skb. It is better to avoid using
skb after can_put_echo_skb.
Signed-off-by: Hangyu Hua <hbh25y@xxxxxxxxx>
---
drivers/net/can/m_can/m_can.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 1a4b56f6fa8c..98be5742f4f5 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -1607,6 +1607,7 @@ static netdev_tx_t m_can_tx_handler(struct m_can_classdev *cdev)
u32 cccr, fdflags;
int err;
int putidx;
+ unsigned int len = skb->len;
cdev->tx_skb = NULL;
@@ -1642,7 +1643,7 @@ static netdev_tx_t m_can_tx_handler(struct m_can_classdev *cdev)
if (cdev->can.ctrlmode & CAN_CTRLMODE_FD) {
cccr = m_can_read(cdev, M_CAN_CCCR);
cccr &= ~CCCR_CMR_MASK;
- if (can_is_canfd_skb(skb)) {
+ if (len == CANFD_MTU) {
if (cf->flags & CANFD_BRS)
cccr |= FIELD_PREP(CCCR_CMR_MASK,
CCCR_CMR_CANFD_BRS);
--
2.25.1
