Messages in this thread Patch in this message | | | Date | Fri, 26 Nov 2010 11:25:34 +0900 | From | Tomoya MORINAGA <> | Subject | [PATCH net-next-2.6 17/19 v5] can: EG20T PCH: Optimize "if" condition in rx/tx processing |
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Optimize "if" condition in rx/tx processing 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(-)
diff --git a/drivers/net/can/pch_can.c b/drivers/net/can/pch_can.c index 1675045..16806da 100644 --- a/drivers/net/can/pch_can.c +++ b/drivers/net/can/pch_can.c @@ -757,19 +757,16 @@ 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); } @@ -911,14 +908,13 @@ 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++; } @@ -937,9 +933,7 @@ 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); -- 1.6.0.6
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