diff --git a/[refs] b/[refs]
index 3d318e3981e7..42b93a1e98aa 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5d5b7c39cfdc459c079ed75b65a537f40ffb82da
+refs/heads/master: cd2638a86c7b90e77ce623c09de2a26177f2a5c1
diff --git a/trunk/drivers/net/igb/igb_main.c b/trunk/drivers/net/igb/igb_main.c
index 55edcb74abf4..5b04eff2fd23 100644
--- a/trunk/drivers/net/igb/igb_main.c
+++ b/trunk/drivers/net/igb/igb_main.c
@@ -6115,6 +6115,13 @@ int igb_set_spd_dplx(struct igb_adapter *adapter, u16 spddplx)
 
 	mac->autoneg = 0;
 
+	/* Fiber NIC's only allow 1000 Gbps Full duplex */
+	if ((adapter->hw.phy.media_type == e1000_media_type_internal_serdes) &&
+		spddplx != (SPEED_1000 + DUPLEX_FULL)) {
+		dev_err(&pdev->dev, "Unsupported Speed/Duplex configuration\n");
+		return -EINVAL;
+	}
+
 	switch (spddplx) {
 	case SPEED_10 + DUPLEX_HALF:
 		mac->forced_speed_duplex = ADVERTISE_10_HALF;