commit b82583ec6f1a5ca765a2a331317c3b5791036b25
author David S. Miller <davem@davemloft.net> Sat Dec 05 22:45:56 2015 -0500
committer David S. Miller <davem@davemloft.net> Sat Dec 05 22:45:56 2015 -0500
tree 9cc1e4fa08f87b2c7cdc1ac169a0136074b871ec
parent 04f96468f78897099188185efda95fba9f371b7c
parent 37742f028b301205c2b658c16bafbee7552035d0

Merge branch 'renesas-read-mac'

Sergei Shtylyov says:

====================
Renesas: read MAC address registers only once

Here's 2 patches against DaveM's 'net-next.git' repo. Here we optimize
the MAC address register reading (left over from a bootloader).

[1/2] ravb: read MAC address registers only once
[2/2] sh_eth: read MAC address registers only once
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/renesas/ravb_main.c

diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index be019e7..1cf1226 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -115,12 +115,15 @@
 	if (mac) {
 		ether_addr_copy(ndev->dev_addr, mac);
 	} else {
-		ndev->dev_addr[0] = (ravb_read(ndev, MAHR) >> 24);
-		ndev->dev_addr[1] = (ravb_read(ndev, MAHR) >> 16) & 0xFF;
-		ndev->dev_addr[2] = (ravb_read(ndev, MAHR) >> 8) & 0xFF;
-		ndev->dev_addr[3] = (ravb_read(ndev, MAHR) >> 0) & 0xFF;
-		ndev->dev_addr[4] = (ravb_read(ndev, MALR) >> 8) & 0xFF;
-		ndev->dev_addr[5] = (ravb_read(ndev, MALR) >> 0) & 0xFF;
+		u32 mahr = ravb_read(ndev, MAHR);
+		u32 malr = ravb_read(ndev, MALR);
+
+		ndev->dev_addr[0] = (mahr >> 24) & 0xFF;
+		ndev->dev_addr[1] = (mahr >> 16) & 0xFF;
+		ndev->dev_addr[2] = (mahr >>  8) & 0xFF;
+		ndev->dev_addr[3] = (mahr >>  0) & 0xFF;
+		ndev->dev_addr[4] = (malr >>  8) & 0xFF;
+		ndev->dev_addr[5] = (malr >>  0) & 0xFF;
 	}
 }
 

drivers/net/ethernet/renesas/sh_eth.c

diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 7f3c610..2406ad4 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -989,12 +989,15 @@
 	if (mac[0] || mac[1] || mac[2] || mac[3] || mac[4] || mac[5]) {
 		memcpy(ndev->dev_addr, mac, ETH_ALEN);
 	} else {
-		ndev->dev_addr[0] = (sh_eth_read(ndev, MAHR) >> 24);
-		ndev->dev_addr[1] = (sh_eth_read(ndev, MAHR) >> 16) & 0xFF;
-		ndev->dev_addr[2] = (sh_eth_read(ndev, MAHR) >> 8) & 0xFF;
-		ndev->dev_addr[3] = (sh_eth_read(ndev, MAHR) & 0xFF);
-		ndev->dev_addr[4] = (sh_eth_read(ndev, MALR) >> 8) & 0xFF;
-		ndev->dev_addr[5] = (sh_eth_read(ndev, MALR) & 0xFF);
+		u32 mahr = sh_eth_read(ndev, MAHR);
+		u32 malr = sh_eth_read(ndev, MALR);
+
+		ndev->dev_addr[0] = (mahr >> 24) & 0xFF;
+		ndev->dev_addr[1] = (mahr >> 16) & 0xFF;
+		ndev->dev_addr[2] = (mahr >>  8) & 0xFF;
+		ndev->dev_addr[3] = (mahr >>  0) & 0xFF;
+		ndev->dev_addr[4] = (malr >>  8) & 0xFF;
+		ndev->dev_addr[5] = (malr >>  0) & 0xFF;
 	}
 }