Re: [PATCH] can: kvaser_usb: Add support for Kvaser CAN/USB devices

On 07/31/2012 11:56 AM, Marc Kleine-Budde wrote:

On 07/30/2012 03:33 PM, Olivier Sobrie wrote:

...

quoted

quoted

quoted

+static void kvaser_usb_rx_error(const struct kvaser_usb *dev,
+				const struct kvaser_msg *msg)
+{
+	struct can_frame *cf;
+	struct sk_buff *skb;
+	struct net_device_stats *stats;
+	struct kvaser_usb_net_priv *priv;
+	u8 channel, status, txerr, rxerr;
+
+	if (msg->id == CMD_CAN_ERROR_EVENT) {
+		channel = msg->u.error_event.channel;
+		status =  msg->u.error_event.status;
+		txerr = msg->u.error_event.tx_errors_count;
+		rxerr = msg->u.error_event.rx_errors_count;
+	} else {
+		channel = msg->u.chip_state_event.channel;
+		status =  msg->u.chip_state_event.status;
+		txerr = msg->u.chip_state_event.tx_errors_count;
+		rxerr = msg->u.chip_state_event.rx_errors_count;
+	}
+
+	if (channel >= dev->nchannels) {
+		dev_err(dev->udev->dev.parent,
+			"Invalid channel number (%d)\n", channel);
+		return;
+	}
+
+	priv = dev->nets[channel];
+	stats = &priv->netdev->stats;
+
+	skb = alloc_can_err_skb(priv->netdev, &cf);
+	if (!skb) {
+		stats->rx_dropped++;
+		return;
+	}
+
+	if ((status & M16C_STATE_BUS_OFF) ||
+	    (status & M16C_STATE_BUS_RESET)) {
+		priv->can.state = CAN_STATE_BUS_OFF;
+		cf->can_id |= CAN_ERR_BUSOFF;
+		can_bus_off(priv->netdev);

you should increment priv->can.can_stats.bus_off

No, already done in can_bus_off():

  http://lxr.free-electrons.com/source/drivers/net/can/dev.c#L439

Wolfgang.