diff options
Diffstat (limited to 'drivers/net/can/dev.c')
| -rw-r--r-- | drivers/net/can/dev.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c index f0b9a1e1db4..39b99f57c26 100644 --- a/drivers/net/can/dev.c +++ b/drivers/net/can/dev.c @@ -245,7 +245,7 @@ static void can_flush_echo_skb(struct net_device *dev) struct net_device_stats *stats = &dev->stats; int i; - for (i = 0; i < CAN_ECHO_SKB_MAX; i++) { + for (i = 0; i < priv->echo_skb_max; i++) { if (priv->echo_skb[i]) { kfree_skb(priv->echo_skb[i]); priv->echo_skb[i] = NULL; @@ -262,10 +262,13 @@ static void can_flush_echo_skb(struct net_device *dev) * of the device driver. The driver must protect access to * priv->echo_skb, if necessary. */ -void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev, int idx) +void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev, + unsigned int idx) { struct can_priv *priv = netdev_priv(dev); + BUG_ON(idx >= priv->echo_skb_max); + /* check flag whether this packet has to be looped back */ if (!(dev->flags & IFF_ECHO) || skb->pkt_type != PACKET_LOOPBACK) { kfree_skb(skb); @@ -311,10 +314,12 @@ EXPORT_SYMBOL_GPL(can_put_echo_skb); * is handled in the device driver. The driver must protect * access to priv->echo_skb, if necessary. */ -void can_get_echo_skb(struct net_device *dev, int idx) +void can_get_echo_skb(struct net_device *dev, unsigned int idx) { struct can_priv *priv = netdev_priv(dev); + BUG_ON(idx >= priv->echo_skb_max); + if (priv->echo_skb[idx]) { netif_rx(priv->echo_skb[idx]); priv->echo_skb[idx] = NULL; @@ -327,10 +332,12 @@ EXPORT_SYMBOL_GPL(can_get_echo_skb); * * The function is typically called when TX failed. */ -void can_free_echo_skb(struct net_device *dev, int idx) +void can_free_echo_skb(struct net_device *dev, unsigned int idx) { struct can_priv *priv = netdev_priv(dev); + BUG_ON(idx >= priv->echo_skb_max); + if (priv->echo_skb[idx]) { kfree_skb(priv->echo_skb[idx]); priv->echo_skb[idx] = NULL; @@ -445,17 +452,30 @@ static void can_setup(struct net_device *dev) /* * Allocate and setup space for the CAN network device */ -struct net_device *alloc_candev(int sizeof_priv) +struct net_device *alloc_candev(int sizeof_priv, unsigned int echo_skb_max) { struct net_device *dev; struct can_priv *priv; + int size; - dev = alloc_netdev(sizeof_priv, "can%d", can_setup); + if (echo_skb_max) + size = ALIGN(sizeof_priv, sizeof(struct sk_buff *)) + + echo_skb_max * sizeof(struct sk_buff *); + else + size = sizeof_priv; + + dev = alloc_netdev(size, "can%d", can_setup); if (!dev) return NULL; priv = netdev_priv(dev); + if (echo_skb_max) { + priv->echo_skb_max = echo_skb_max; + priv->echo_skb = (void *)priv + + ALIGN(sizeof_priv, sizeof(struct sk_buff *)); + } + priv->state = CAN_STATE_STOPPED; init_timer(&priv->restart_timer); |