--- zzzz-none-000/linux-2.6.39.4/drivers/net/e100.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-atom-6490-729/linux-2.6.39.4/drivers/net/e100.c	2021-11-10 13:38:15.000000000 +0000
@@ -2579,6 +2579,7 @@
 
 		/* save speed, duplex & autoneg settings */
 		err = mii_ethtool_gset(&nic->mii, &cmd);
+		WARN_ON(err);
 
 		if (netif_running(netdev))
 			e100_down(nic);
@@ -2588,6 +2589,7 @@
 
 		/* restore speed, duplex & autoneg settings */
 		err = mii_ethtool_sset(&nic->mii, &cmd);
+		WARN_ON(err);
 
 		if (netif_running(netdev))
 			e100_up(nic);