[PATCH net-next v2 3/9] r8169: factor out reading MAC address from registers

[Heiner Kallweit]

For RTL8125 we will have to read the MAC address also from another
register range, therefore create a small helper.

Signed-off-by: Heiner Kallweit <hkallwe...@gmail.com>
---
 drivers/net/ethernet/realtek/r8169_main.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/realtek/r8169_main.c 
b/drivers/net/ethernet/realtek/r8169_main.c
index e9d900c11..7d89826cb 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -741,6 +741,14 @@ static bool rtl_supports_eee(struct rtl8169_private *tp)
               tp->mac_version != RTL_GIGA_MAC_VER_39;
 }
 
+static void rtl_read_mac_from_reg(struct rtl8169_private *tp, u8 *mac, int reg)
+{
+       int i;
+
+       for (i = 0; i < ETH_ALEN; i++)
+               mac[i] = RTL_R8(tp, reg + i);
+}
+
 struct rtl_cond {
        bool (*check)(struct rtl8169_private *);
        const char *msg;
@@ -6630,7 +6638,7 @@ static void rtl_init_mac_address(struct rtl8169_private 
*tp)
 {
        struct net_device *dev = tp->dev;
        u8 *mac_addr = dev->dev_addr;
-       int rc, i;
+       int rc;
 
        rc = eth_platform_get_mac_address(tp_to_dev(tp), mac_addr);
        if (!rc)
@@ -6640,8 +6648,7 @@ static void rtl_init_mac_address(struct rtl8169_private 
*tp)
        if (is_valid_ether_addr(mac_addr))
                goto done;
 
-       for (i = 0; i < ETH_ALEN; i++)
-               mac_addr[i] = RTL_R8(tp, MAC0 + i);
+       rtl_read_mac_from_reg(tp, mac_addr, MAC0);
        if (is_valid_ether_addr(mac_addr))
                goto done;
 
-- 
2.23.0