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can: xilinx_can: update stats.tx_bytes after transmission 

The driver updates stats.tx_bytes in start_xmit() even though it could
do so in TX interrupt handler.

Change the code to update tx_bytes in the interrupt handler, using the
return value of can_get_echo_skb().

Signed-off-by: Anssi Hannula <anssi.hannula@bitwise.fi>
Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Anssi Hannula 2018-02-26 14:50:35 +02:00 committed by Marc Kleine-Budde
parent 6181dbc02b
commit 11ee5fcd6a
1 changed files with 2 additions and 4 deletions
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6
drivers/net/can/xilinx_can.c
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@ -403,7 +403,6 @@ static int xcan_do_set_mode(struct net_device *ndev, enum can_mode mode)
static netdev_tx_t xcan_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct xcan_priv *priv = netdev_priv(ndev);
struct net_device_stats *stats = &ndev->stats;
struct can_frame *cf = (struct can_frame *)skb->data;
u32 id, dlc, data[2] = {0, 0};
unsigned long flags;
@ -469,7 +468,6 @@ static netdev_tx_t xcan_start_xmit(struct sk_buff *skb, struct net_device *ndev)
* write triggers tranmission
*/
priv->write_reg(priv, XCAN_TXFIFO_DW2_OFFSET, data[1]);
stats->tx_bytes += cf->can_dlc;
}
/* Clear TX-FIFO-empty interrupt for xcan_tx_interrupt() */
@ -889,8 +887,8 @@ static void xcan_tx_interrupt(struct net_device *ndev, u32 isr)
}
while (frames_sent--) {
can_get_echo_skb(ndev, priv->tx_tail %
priv->tx_max);
stats->tx_bytes += can_get_echo_skb(ndev, priv->tx_tail %
priv->tx_max);
priv->tx_tail++;
stats->tx_packets++;
}