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can: dev: let can_get_echo_skb() return dlc of CAN frame

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can_get_echo_skb() is usually called in the TX complete handler.
The stats->tx_packets and stats->tx_bytes should be updated there, too.
This patch simplifies to figure out the size of the sent CAN frame.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Marc Kleine-Budde 2011-10-10 23:43:53 +02:00
parent f84cbda06f
commit cf5046b309
2 changed files with 10 additions and 2 deletions
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10
drivers/net/can/dev.c
View file

@ -327,16 +327,24 @@ EXPORT_SYMBOL_GPL(can_put_echo_skb);
* is handled in the device driver. The driver must protect * is handled in the device driver. The driver must protect
* access to priv->echo_skb, if necessary. * access to priv->echo_skb, if necessary.
*/ */
void can_get_echo_skb(struct net_device *dev, unsigned int idx) unsigned int can_get_echo_skb(struct net_device *dev, unsigned int idx)
{ {
struct can_priv *priv = netdev_priv(dev); struct can_priv *priv = netdev_priv(dev);
BUG_ON(idx >= priv->echo_skb_max); BUG_ON(idx >= priv->echo_skb_max);
if (priv->echo_skb[idx]) { if (priv->echo_skb[idx]) {
struct sk_buff *skb = priv->echo_skb[idx];
struct can_frame *cf = (struct can_frame *)skb->data;
u8 dlc = cf->can_dlc;
netif_rx(priv->echo_skb[idx]); netif_rx(priv->echo_skb[idx]);
priv->echo_skb[idx] = NULL; priv->echo_skb[idx] = NULL;
return dlc;
} }
return 0;
} }
EXPORT_SYMBOL_GPL(can_get_echo_skb); EXPORT_SYMBOL_GPL(can_get_echo_skb);

2
include/linux/can/dev.h
View file

@ -92,7 +92,7 @@ void can_bus_off(struct net_device *dev);
void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev, void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
unsigned int idx); unsigned int idx);
void can_get_echo_skb(struct net_device *dev, unsigned int idx); unsigned int can_get_echo_skb(struct net_device *dev, unsigned int idx);
void can_free_echo_skb(struct net_device *dev, unsigned int idx); void can_free_echo_skb(struct net_device *dev, unsigned int idx);
struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf); struct sk_buff *alloc_can_skb(struct net_device *dev, struct can_frame **cf);