pch_can: 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>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/can/pch_can.c b/drivers/net/can/pch_can.c
index 8efbe35..dcd8f00 100644
--- a/drivers/net/can/pch_can.c
+++ b/drivers/net/can/pch_can.c
@@ -746,19 +746,16 @@
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_BUS_OFF | PCH_LEC_ALL)) &&
+ ((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_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);
}
@@ -900,14 +897,13 @@
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++;
}
@@ -926,9 +922,7 @@
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);