From: Wolfgang Grandegger Date: Tue, 1 Sep 2009 05:26:12 +0000 (+0000) Subject: can: add can_free_echo_skb() for upcoming drivers X-Git-Tag: v2.6.32-rc1~703^2~85 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=39e3ab6fded4d7e66e01a878f0cae23ddd480c3b;p=profile%2Fivi%2Fkernel-adaptation-intel-automotive.git 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 Signed-off-by: David S. Miller --- diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c index 1d29082..f0b9a1e 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 4a37a56..5824b20 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 */