[PATCH 5.10 240/545] can: kvaser_usb_hydra: do not report txerr and rxerr during bus-off

Greg Kroah-Hartman
2022-08-19T16:14:05Z

From: Vincent Mailhol <mailhol.vincent@wanadoo.fr>

[ Upstream commit 936e90595376e64b6247c72d3ea8b8b164b7ac96 ]

During bus off, the error count is greater than 255 and can not fit in
a u8.

Fixes: aec5fb2268b7 ("can: kvaser_usb: Add support for Kvaser USB hydra family")
Link: https://lore.kernel.org/all/20220719143550.3681-8-mailhol.vincent@wanadoo.fr
CC: Jimmy Assarsson <extja@kvaser.com>
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
index a7c408acb0c0..01d4a731b579 100644
--- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
+++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
@@ -890,8 +890,10 @@ static void kvaser_usb_hydra_update_state(struct kvaser_usb_net_priv *priv,
new_state < CAN_STATE_BUS_OFF)
priv->can.can_stats.restarts++;

- cf->data[6] = bec->txerr;
- cf->data[7] = bec->rxerr;
+ if (new_state != CAN_STATE_BUS_OFF) {
+ cf->data[6] = bec->txerr;
+ cf->data[7] = bec->rxerr;
+ }

stats = &netdev->stats;
stats->rx_packets++;
@@ -1045,8 +1047,10 @@ kvaser_usb_hydra_error_frame(struct kvaser_usb_net_priv *priv,
shhwtstamps->hwtstamp = hwtstamp;

cf->can_id |= CAN_ERR_BUSERROR;
- cf->data[6] = bec.txerr;
- cf->data[7] = bec.rxerr;
+ if (new_state != CAN_STATE_BUS_OFF) {
+ cf->data[6] = bec.txerr;
+ cf->data[7] = bec.rxerr;
+ }

stats->rx_packets++;
stats->rx_bytes += cf->can_dlc;
--
2.35.1