ravb: stop reading ECMR in ravb_emac_init()

The code in ravb_emac_init() twiddling the ECMR bits always looked a bit
strange to me: if one intends to respect 'priv->duplex', why save old value
of the ECMR.DM bit?   As all the other bits are zeroed anyway, we don't
really need to read ECMR before writing to it.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 467d416..fef4fa1 100644 (file)
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -338,16 +338,13 @@ error:
 static void ravb_emac_init(struct net_device *ndev)
 {
        struct ravb_private *priv = netdev_priv(ndev);
-       u32 ecmr;
 
        /* Receive frame limit set register */
        ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR);
 
        /* PAUSE prohibition */
-       ecmr =  ravb_read(ndev, ECMR);
-       ecmr &= ECMR_DM;
-       ecmr |= ECMR_ZPF | (priv->duplex ? ECMR_DM : 0) | ECMR_TE | ECMR_RE;
-       ravb_write(ndev, ecmr, ECMR);
+       ravb_write(ndev, ECMR_ZPF | (priv->duplex ? ECMR_DM : 0) |
+                  ECMR_TE | ECMR_RE, ECMR);
 
        ravb_set_rate(ndev);