1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c
index e2288b5a9caa..bfe9208c4b18 100644
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -1624,6 +1624,20 @@ static int igb_setup_loopback_test(struct igb_adapter *adapter)
                 reg &= ~E1000_CONNSW_ENRGSRC;
                 wr32(E1000_CONNSW, reg);
 
+                /* Unset sigdetect for SERDES loopback on
+                 * 82580 and i350 devices.
+                 */
+                switch (hw->mac.type) {
+                case e1000_82580:
+                case e1000_i350:
+                        reg = rd32(E1000_PCS_CFG0);
+                        reg |= E1000_PCS_CFG_IGN_SD;
+                        wr32(E1000_PCS_CFG0, reg);
+                        break;
+                default:
+                        break;
+                }
+
                 /* Set PCS register for forced speed */
                 reg = rd32(E1000_PCS_LCTL);
                 reg &= ~E1000_PCS_LCTL_AN_ENABLE;     /* Disable Autoneg*/