can: sja1000: sja1000_err(): don't count arbitration lose as an error

Losing arbitration is normal in a CAN-bus network, it means that a higher
priority frame is being send and the pending message will be retried later.
Hence most driver only increment arbitration_lost, but the sja1000 driver also
incremeants tx_error, causing errors to be reported on a normal functioning
CAN-bus. So stop counting them as errors.

Fixes: 8935f57e68c4 ("can: sja1000: fix network statistics update")
Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Link: https://lore.kernel.org/r/20201127095941.21609-1-jhofstee@victronenergy.com
[mkl: split into two seperate patches]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/sja1000/sja1000.c b/drivers/net/can/sja1000/sja1000.c
index 9f10779..25a4d7d 100644 (file)
--- a/drivers/net/can/sja1000/sja1000.c
+++ b/drivers/net/can/sja1000/sja1000.c
@@ -474,7 +474,6 @@ static int sja1000_err(struct net_device *dev, uint8_t isrc, uint8_t status)
                netdev_dbg(dev, "arbitration lost interrupt\n");
                alc = priv->read_reg(priv, SJA1000_ALC);
                priv->can.can_stats.arbitration_lost++;
-               stats->tx_errors++;
                cf->can_id |= CAN_ERR_LOSTARB;
                cf->data[0] = alc & 0x1f;
        }