igb: read address from RAH/RAL instead of from EEPROM

Instead of pulling the mac address from EEPROM it is easier to pull it from
the RAL/RAH registers and then just copy it into the address structures.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 17 deletions

diff --git a/drivers/net/igb/e1000_nvm.c b/drivers/net/igb/e1000_nvm.c
index a84e4e429fa7..5942da107a9c 100644
--- a/drivers/net/igb/e1000_nvm.c
+++ b/drivers/net/igb/e1000_nvm.c
@@ -515,29 +515,23 @@ out:
  **/
 s32 igb_read_mac_addr(struct e1000_hw *hw)
 {
-        s32  ret_val = 0;
-        u16 offset, nvm_data, i;
+        u32 rar_high;
+        u32 rar_low;
+        u16 i;
 
-        for (i = 0; i < ETH_ALEN; i += 2) {
-                offset = i >> 1;
-                ret_val = hw->nvm.ops.read_nvm(hw, offset, 1, &nvm_data);
-                if (ret_val) {
-                        hw_dbg("NVM Read Error\n");
-                        goto out;
-                }
-                hw->mac.perm_addr[i] = (u8)(nvm_data & 0xFF);
-                hw->mac.perm_addr[i+1] = (u8)(nvm_data >> 8);
-        }
+        rar_high = rd32(E1000_RAH(0));
+        rar_low = rd32(E1000_RAL(0));
+
+        for (i = 0; i < E1000_RAL_MAC_ADDR_LEN; i++)
+                hw->mac.perm_addr[i] = (u8)(rar_low >> (i*8));
 
-        /* Flip last bit of mac address if we're on second port */
-        if (hw->bus.func == E1000_FUNC_1)
-                hw->mac.perm_addr[5] ^= 1;
+        for (i = 0; i < E1000_RAH_MAC_ADDR_LEN; i++)
+                hw->mac.perm_addr[i+4] = (u8)(rar_high >> (i*8));
 
         for (i = 0; i < ETH_ALEN; i++)
                 hw->mac.addr[i] = hw->mac.perm_addr[i];
 
-out:
-        return ret_val;
+        return 0;
 }
 
 /**