e1000e: alternate MAC address update

If word 0x37 in the EEPROM is 0xFFFF _or_ 0x0000, then there is no
alternate MAC address in the EEPROM.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/e1000e/lib.c b/drivers/net/e1000e/lib.c
index 58af091c8c3a..0893ab107adf 100644
--- a/drivers/net/e1000e/lib.c
+++ b/drivers/net/e1000e/lib.c
@@ -201,10 +201,10 @@ s32 e1000_check_alt_mac_addr_generic(struct e1000_hw *hw)
                 goto out;
         }
 
-        if (nvm_alt_mac_addr_offset == 0xFFFF) {
+        if ((nvm_alt_mac_addr_offset == 0xFFFF) ||
+            (nvm_alt_mac_addr_offset == 0x0000))
                 /* There is no Alternate MAC Address */
                 goto out;
-        }
 
         if (hw->bus.func == E1000_FUNC_1)
                 nvm_alt_mac_addr_offset += E1000_ALT_MAC_ADDRESS_OFFSET_LAN1;