[TG3]: Fix PHY loopback on 5700

Fix PHY loopback failure on some 5700 devices.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 0fafc5264627..3c5c9fafe9c8 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -8399,8 +8399,11 @@ static int tg3_run_loopback(struct tg3 *tp, int loopback_mode)
                 }
                 mac_mode = (tp->mac_mode & ~MAC_MODE_PORT_MODE_MASK) |
                            MAC_MODE_LINK_POLARITY | MAC_MODE_PORT_MODE_GMII;
-                if ((tp->phy_id & PHY_ID_MASK) == PHY_ID_BCM5401)
+                if ((tp->phy_id & PHY_ID_MASK) == PHY_ID_BCM5401) {
                         mac_mode &= ~MAC_MODE_LINK_POLARITY;
+                        tg3_writephy(tp, MII_TG3_EXT_CTRL,
+                                     MII_TG3_EXT_CTRL_LNK3_LED_MODE);
+                }
                 tw32(MAC_MODE, mac_mode);
         }
         else