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sh_eth: stop reading ECMR in sh_eth_dev_init()

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The code in sh_eth_dev_init()  twiddling the ECMR bits always looked a bit
strange to me:  if one intends to respect 'mdp->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>
This commit is contained in:
Sergei Shtylyov 2016-01-11 00:28:14 +03:00 committed by David S. Miller
parent 1c1fa82119
commit bffa731f8f
1 changed files with 2 additions and 5 deletions
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7
drivers/net/ethernet/renesas/sh_eth.c
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@ -1289,7 +1289,6 @@ static int sh_eth_dev_init(struct net_device *ndev, bool start)
{
int ret = 0;
struct sh_eth_private *mdp = netdev_priv(ndev);
u32 val;
/* Soft Reset */
ret = sh_eth_reset(ndev);
@ -1342,10 +1341,8 @@ static int sh_eth_dev_init(struct net_device *ndev, bool start)
}
/* PAUSE Prohibition */
val = (sh_eth_read(ndev, ECMR) & ECMR_DM) |
ECMR_ZPF | (mdp->duplex ? ECMR_DM : 0) | ECMR_TE | ECMR_RE;
sh_eth_write(ndev, val, ECMR);
sh_eth_write(ndev, ECMR_ZPF | (mdp->duplex ? ECMR_DM : 0) |
ECMR_TE | ECMR_RE, ECMR);
if (mdp->cd->set_rate)
mdp->cd->set_rate(ndev);