e1000e: 82571-based mezzanine card can fail ethtool link test

On certain 82571-based mezzanine NICs in some blade servers, the ethtool
link test can fail due to the serdes_has_link flag not set correctly.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Emil Tantilov <emil.s.tantilov@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/net/e1000e/82571.c b/drivers/net/e1000e/82571.c
index 9333921010cc..6942e2f86eac 100644
--- a/drivers/net/e1000e/82571.c
+++ b/drivers/net/e1000e/82571.c
@@ -1523,8 +1523,10 @@ static s32 e1000_check_for_serdes_link_82571(struct e1000_hw *hw)
                                     e1000_serdes_link_autoneg_progress;
                                 mac->serdes_has_link = false;
                                 e_dbg("AN_UP     -> AN_PROG\n");
+                        } else {
+                                mac->serdes_has_link = true;
                         }
-                break;
+                        break;
 
                 case e1000_serdes_link_forced_up:
                         /*
@@ -1543,6 +1545,8 @@ static s32 e1000_check_for_serdes_link_82571(struct e1000_hw *hw)
                                     e1000_serdes_link_autoneg_progress;
                                 mac->serdes_has_link = false;
                                 e_dbg("FORCED_UP -> AN_PROG\n");
+                        } else {
+                                mac->serdes_has_link = true;
                         }
                         break;
 
@@ -1598,6 +1602,7 @@ static s32 e1000_check_for_serdes_link_82571(struct e1000_hw *hw)
                         ew32(CTRL, (ctrl & ~E1000_CTRL_SLU));
                         mac->serdes_link_state =
                             e1000_serdes_link_autoneg_progress;
+                        mac->serdes_has_link = false;
                         e_dbg("DOWN      -> AN_PROG\n");
                         break;
                 }