can: at91_can: at91_irq_err_line(): send error counters with state change

Since 3e5c291c7942 ("can: add CAN_ERR_CNT flag to notify availability
of error counter") there is a dedicated flag to inform the user space,
that there are CAN error counters in the CAN error frame.

In case the device is not in bus off mode, send the error counters to
user space and set CAN_ERR_CNT.

Link: https://lore.kernel.org/all/20231005-at91_can-rx_offload-v2-25-9987d53600e0@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
index a413589109b2452842223a671fbd28fac04a5478..d5e1d1b2cdd1cbab61e36b3b0b442bdd48d29b26 100644 (file)
--- a/drivers/net/can/at91_can.c
+++ b/drivers/net/can/at91_can.c
@@ -884,6 +884,11 @@ static void at91_irq_err_line(struct net_device *dev, const u32 reg_sr)
        if (unlikely(!skb))
                return;
 
+       if (new_state != CAN_STATE_BUS_OFF) {
+               cf->can_id |= CAN_ERR_CNT;
+               cf->data[6] = bec.txerr;
+               cf->data[7] = bec.rxerr;
+       }
 
        netif_rx(skb);
 }