diff options
| author | Wolfgang Grandegger <wg@grandegger.com> | 2009-09-01 05:26:12 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-04 02:16:14 -0700 |
| commit | 39e3ab6fded4d7e66e01a878f0cae23ddd480c3b (patch) | |
| tree | 44439df4436f965269f8f795cdf048290a202ed7 | |
| parent | fab4e76373a614d3af624caedf18bee43fc6ca16 (diff) | |
can: add can_free_echo_skb() for upcoming drivers
This patch adds the function can_free_echo_skb to the CAN
device interface to allow upcoming drivers to release echo
skb's in case of error.
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/can/dev.c | 18 | ||||
| -rw-r--r-- | include/linux/can/dev.h | 1 |
2 files changed, 18 insertions, 1 deletions
diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c index 1d29082d94a..f0b9a1e1db4 100644 --- a/drivers/net/can/dev.c +++ b/drivers/net/can/dev.c @@ -315,7 +315,7 @@ void can_get_echo_skb(struct net_device *dev, int idx) { struct can_priv *priv = netdev_priv(dev); - if ((dev->flags & IFF_ECHO) && priv->echo_skb[idx]) { + if (priv->echo_skb[idx]) { netif_rx(priv->echo_skb[idx]); priv->echo_skb[idx] = NULL; } @@ -323,6 +323,22 @@ void can_get_echo_skb(struct net_device *dev, int idx) EXPORT_SYMBOL_GPL(can_get_echo_skb); /* + * Remove the skb from the stack and free it. + * + * The function is typically called when TX failed. + */ +void can_free_echo_skb(struct net_device *dev, int idx) +{ + struct can_priv *priv = netdev_priv(dev); + + if (priv->echo_skb[idx]) { + kfree_skb(priv->echo_skb[idx]); + priv->echo_skb[idx] = NULL; + } +} +EXPORT_SYMBOL_GPL(can_free_echo_skb); + +/* * CAN device restart for bus-off recovery */ void can_restart(unsigned long data) diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h index 4a37a56f6cd..5824b20b5fc 100644 --- a/include/linux/can/dev.h +++ b/include/linux/can/dev.h @@ -66,5 +66,6 @@ void can_bus_off(struct net_device *dev); void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev, int idx); void can_get_echo_skb(struct net_device *dev, int idx); +void can_free_echo_skb(struct net_device *dev, int idx); #endif /* CAN_DEV_H */ |