diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/can/c_can/c_can.c | 37 |
1 files changed, 17 insertions, 20 deletions
diff --git a/drivers/net/can/c_can/c_can.c b/drivers/net/can/c_can/c_can.c index 1e75223..42c038d 100644 --- a/drivers/net/can/c_can/c_can.c +++ b/drivers/net/can/c_can/c_can.c @@ -232,10 +232,9 @@ static inline int get_tx_next_msg_obj(const struct c_can_priv *priv) C_CAN_MSG_OBJ_TX_FIRST; } -static inline int get_tx_echo_msg_obj(const struct c_can_priv *priv) +static inline int get_tx_echo_msg_obj(int txecho) { - return (priv->tx_echo & C_CAN_NEXT_MSG_OBJ_MASK) + - C_CAN_MSG_OBJ_TX_FIRST; + return (txecho & C_CAN_NEXT_MSG_OBJ_MASK) + C_CAN_MSG_OBJ_TX_FIRST; } static u32 c_can_read_reg32(struct c_can_priv *priv, enum reg index) @@ -729,8 +728,6 @@ static int c_can_get_berr_counter(const struct net_device *dev, } /* - * theory of operation: - * * priv->tx_echo holds the number of the oldest can_frame put for * transmission into the hardware, but not yet ACKed by the CAN tx * complete IRQ. @@ -741,29 +738,23 @@ static int c_can_get_berr_counter(const struct net_device *dev, */ static void c_can_do_tx(struct net_device *dev) { - u32 val; - u32 msg_obj_no; struct c_can_priv *priv = netdev_priv(dev); struct net_device_stats *stats = &dev->stats; + u32 val, obj, pkts = 0, bytes = 0; spin_lock_bh(&priv->xmit_lock); for (; (priv->tx_next - priv->tx_echo) > 0; priv->tx_echo++) { - msg_obj_no = get_tx_echo_msg_obj(priv); + obj = get_tx_echo_msg_obj(priv->tx_echo); val = c_can_read_reg32(priv, C_CAN_TXRQST1_REG); - if (!(val & (1 << (msg_obj_no - 1)))) { - can_get_echo_skb(dev, - msg_obj_no - C_CAN_MSG_OBJ_TX_FIRST); - c_can_object_get(dev, IF_TX, msg_obj_no, IF_COMM_ALL); - stats->tx_bytes += priv->read_reg(priv, - C_CAN_IFACE(MSGCTRL_REG, IF_TX)) - & IF_MCONT_DLC_MASK; - stats->tx_packets++; - can_led_event(dev, CAN_LED_EVENT_TX); - c_can_inval_msg_object(dev, IF_TX, msg_obj_no); - } else { + + if (val & (1 << (obj - 1))) break; - } + + can_get_echo_skb(dev, obj - C_CAN_MSG_OBJ_TX_FIRST); + bytes += priv->dlc[obj - C_CAN_MSG_OBJ_TX_FIRST]; + pkts++; + c_can_inval_msg_object(dev, IF_TX, obj); } /* restart queue if wrap-up or if queue stalled on last pkt */ @@ -772,6 +763,12 @@ static void c_can_do_tx(struct net_device *dev) netif_wake_queue(dev); spin_unlock_bh(&priv->xmit_lock); + + if (pkts) { + stats->tx_bytes += bytes; + stats->tx_packets += pkts; + can_led_event(dev, CAN_LED_EVENT_TX); + } } /* |