@@ -758,19 +758,16 @@ static int pch_can_poll(struct napi_struct *napi,
int quota)
if (int_stat == PCH_STATUS_INT) {
reg_stat = ioread32(&priv->regs->stat);
- if (reg_stat & (PCH_BUS_OFF | PCH_LEC_ALL)) {
- if (reg_stat & PCH_BUS_OFF ||
- (reg_stat & PCH_LEC_ALL) != PCH_LEC_ALL) {
- pch_can_error(ndev, reg_stat);
- quota--;
- }
- }
- if (reg_stat & PCH_TX_OK)
- pch_can_bit_clear(&priv->regs->stat, PCH_TX_OK);
+ if ((reg_stat & (PCH_BUS_OFF | PCH_LEC_ALL)) &&
+ ((reg_stat & PCH_LEC_ALL) != PCH_LEC_ALL)) {
+ pch_can_error(ndev, reg_stat);
+ quota--;
+ }
- if (reg_stat & PCH_RX_OK)
- pch_can_bit_clear(&priv->regs->stat, PCH_RX_OK);
+ if (reg_stat & (PCH_TX_OK | PCH_RX_OK))
+ pch_can_bit_clear(&priv->regs->stat,
+ reg_stat & (PCH_TX_OK | PCH_RX_OK));
int_stat = pch_can_int_pending(priv);
For reduce "if" condition, easy to read/understand the code, optimize "if" condition in rx/tx processing. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> --- drivers/net/can/pch_can.c | 26 ++++++++++---------------- 1 files changed, 10 insertions(+), 16 deletions(-) } @@ -917,14 +914,13 @@ static netdev_tx_t pch_xmit(struct sk_buff *skb, struct net_device *ndev) if (can_dropped_invalid_skb(ndev, skb)) return NETDEV_TX_OK; + tx_obj_no = priv->tx_obj; if (priv->tx_obj == PCH_TX_OBJ_END) { if (ioread32(&priv->regs->treq2) & PCH_TREQ2_TX_MASK) netif_stop_queue(ndev); - tx_obj_no = priv->tx_obj; priv->tx_obj = PCH_TX_OBJ_START; } else { - tx_obj_no = priv->tx_obj; priv->tx_obj++; } @@ -947,9 +943,7 @@ static netdev_tx_t pch_xmit(struct sk_buff *skb, struct net_device *ndev) id2 |= PCH_ID_MSGVAL; /* If remote frame has to be transmitted.. */ - if (cf->can_id & CAN_RTR_FLAG) - id2 &= ~PCH_ID2_DIR; - else + if (!(cf->can_id & CAN_RTR_FLAG)) id2 |= PCH_ID2_DIR; iowrite32(id2, &priv->regs->ifregs[1].id2);