In commit 1be37d3b0414 ("can: m_can: fix periph RX path: use
rx-offload to ensure skbs are sent from softirq context") the RX path
for peripheral devices was switched to RX-offload.
Received CAN frames are pushed to RX-offload together with a
timestamp. RX-offload is designed to handle overflows of the timestamp
correctly, if 32 bit timestamps are provided.
The timestamps of m_can core are only 16 bits wide. So this patch
shifts them to full 32 bit before passing them to RX-offload.
Fixes: 1be37d3b0414 ("can: m_can: fix periph RX path: use rx-offload to ensure skbs are sent from softirq context")
Cc: Torin Cooper-Bennun <torin@xxxxxxxxxxxxxxxxxx>
Cc: Chandrasekar Ramakrishnan <rcsekar@xxxxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
drivers/net/can/m_can/m_can.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 03a22d493cf6..7931f9c71ef3 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -529,7 +529,7 @@ static int m_can_read_fifo(struct net_device *dev, u32 rxfs)
/* acknowledge rx fifo 0 */
m_can_write(cdev, M_CAN_RXF0A, fgi);
- timestamp = FIELD_GET(RX_BUF_RXTS_MASK, fifo_header.dlc);
+ timestamp = FIELD_GET(RX_BUF_RXTS_MASK, fifo_header.dlc) << 16;
m_can_receive_skb(cdev, skb, timestamp);
@@ -1030,7 +1030,7 @@ static int m_can_echo_tx_event(struct net_device *dev)
}
msg_mark = FIELD_GET(TX_EVENT_MM_MASK, txe);
- timestamp = FIELD_GET(TX_EVENT_TXTS_MASK, txe);
+ timestamp = FIELD_GET(TX_EVENT_TXTS_MASK, txe) << 16;
/* ack txe element */
m_can_write(cdev, M_CAN_TXEFA, FIELD_PREP(TXEFA_EFAI_MASK,
--
2.35.1
