[PATCH 5.18 0489/1095] can: sun4i_can: do not report txerr and rxerr during bus-off

Greg Kroah-Hartman
2022-08-15T21:19:36Z

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

[ Upstream commit 0ac15a8f661b941519379831d09bfb12271b23ee ]

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

Fixes: 0738eff14d81 ("can: Allwinner A10/A20 CAN Controller support - Kernel module")
Link: https://lore.kernel.org/all/20220719143550.3681-7-mailhol.vincent@wanadoo.fr
CC: Chen-Yu Tsai <wens@csie.org>
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/sun4i_can.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/net/can/sun4i_can.c b/drivers/net/can/sun4i_can.c
index 25d6d81ab4f4..f3ad585e766f 100644
--- a/drivers/net/can/sun4i_can.c
+++ b/drivers/net/can/sun4i_can.c
@@ -538,11 +538,6 @@ static int sun4i_can_err(struct net_device *dev, u8 isrc, u8 status)
rxerr = (errc >> 16) & 0xFF;
txerr = errc & 0xFF;

- if (skb) {
- cf->data[6] = txerr;
- cf->data[7] = rxerr;
- }
-
if (isrc & SUN4I_INT_DATA_OR) {
/* data overrun interrupt */
netdev_dbg(dev, "data overrun interrupt\n");
@@ -573,6 +568,10 @@ static int sun4i_can_err(struct net_device *dev, u8 isrc, u8 status)
else
state = CAN_STATE_ERROR_ACTIVE;
}
+ if (skb && state != CAN_STATE_BUS_OFF) {
+ cf->data[6] = txerr;
+ cf->data[7] = rxerr;
+ }
if (isrc & SUN4I_INT_BUS_ERR) {
/* bus error interrupt */
netdev_dbg(dev, "bus error interrupt\n");
--
2.35.1