Commit 7ee330c7 authored Nov 25, 2013 by Holger Bechtold Committed by Marc Kleine-Budde Nov 25, 2013

can: c_can: fix calculation of transmitted bytes on tx complete



The number of bytes transmitted was not updated correctly, if several CAN
messages (with different length) were transmitted in one 'bunch'. Thus
programs like 'ifconfig' showed wrong transmit byte counts. Reason was, that
the message object whose DLC is to be read was not necessarily the active one
at the time when

    priv->read_reg(priv, C_CAN_IFACE(MSGCTRL_REG, 0)) & IF_MCONT_DLC_MASK;

was executed.

Signed-off-by: Holger Bechtold <Holger.Bechtold@gmx.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

parent e35d46ad

drivers/net/can/c_can/c_can.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -763,6 +763,7 @@ static void c_can_do_tx(struct net_device *dev)
		if (!(val & (1 << (msg_obj_no - 1)))) {
		can_get_echo_skb(dev,
		msg_obj_no - C_CAN_MSG_OBJ_TX_FIRST);
		c_can_object_get(dev, 0, msg_obj_no, IF_COMM_ALL);
		stats->tx_bytes += priv->read_reg(priv,
		C_CAN_IFACE(MSGCTRL_REG, 0))
		& IF_MCONT_DLC_MASK;