diff options
| author | Wolfgang Grandegger <wg@grandegger.com> | 2009-09-01 07:26:12 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-09-04 11:16:14 +0200 |
| commit | 39e3ab6fded4d7e66e01a878f0cae23ddd480c3b (patch) | |
| tree | 44439df4436f965269f8f795cdf048290a202ed7 /drivers/net/can/dev.c | |
| parent | WAN: dscc4: Fix warning pointing out a bug. (diff) | |
| download | linux-39e3ab6fded4d7e66e01a878f0cae23ddd480c3b.tar.xz linux-39e3ab6fded4d7e66e01a878f0cae23ddd480c3b.zip | |
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>
Diffstat (limited to 'drivers/net/can/dev.c')
| -rw-r--r-- | drivers/net/can/dev.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c index 1d29082d94ac..f0b9a1e1db46 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) |