netdev - [PATCH net-next 19/29] can: rcar_can: do not report txerr and rxerr during bus-off

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Message-Id: <20220720081034.3277385-20-mkl@pengutronix.de>
Date:   Wed, 20 Jul 2022 10:10:24 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, linux-can@...r.kernel.org,
        kernel@...gutronix.de,
        Vincent Mailhol <mailhol.vincent@...adoo.fr>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 19/29] can: rcar_can: do not report txerr and rxerr during bus-off

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

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

Fixes: fd1159318e55 ("can: add Renesas R-Car CAN driver")
Link: https://lore.kernel.org/all/20220719143550.3681-3-mailhol.vincent@wanadoo.fr
Signed-off-by: Vincent Mailhol <mailhol.vincent@...adoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/rcar/rcar_can.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/can/rcar/rcar_can.c b/drivers/net/can/rcar/rcar_can.c
index d45762f1cf6b..24d7a71def6a 100644
--- a/drivers/net/can/rcar/rcar_can.c
+++ b/drivers/net/can/rcar/rcar_can.c
@@ -232,11 +232,8 @@ static void rcar_can_error(struct net_device *ndev)
 	if (eifr & (RCAR_CAN_EIFR_EWIF | RCAR_CAN_EIFR_EPIF)) {
 		txerr = readb(&priv->regs->tecr);
 		rxerr = readb(&priv->regs->recr);
-		if (skb) {
+		if (skb)
 			cf->can_id |= CAN_ERR_CRTL;
-			cf->data[6] = txerr;
-			cf->data[7] = rxerr;
-		}
 	}
 	if (eifr & RCAR_CAN_EIFR_BEIF) {
 		int rx_errors = 0, tx_errors = 0;
@@ -336,6 +333,9 @@ static void rcar_can_error(struct net_device *ndev)
 		can_bus_off(ndev);
 		if (skb)
 			cf->can_id |= CAN_ERR_BUSOFF;
+	} else if (skb) {
+		cf->data[6] = txerr;
+		cf->data[7] = rxerr;
 	}
 	if (eifr & RCAR_CAN_EIFR_ORIF) {
 		netdev_dbg(priv->ndev, "Receive overrun error interrupt\n");
-- 
2.35.1