diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index 19c4f5966738..f4f23c3446c4 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -1378,7 +1378,7 @@ struct ethtool_per_queue_op {
  * @cmd: Command number = %ETHTOOL_GFECPARAM or %ETHTOOL_SFECPARAM
  * @active_fec: FEC mode which is active on the port
  * @fec: Bitmask of supported/configured FEC modes
- * @rsvd: Reserved for future extensions. i.e FEC bypass feature.
+ * @reserved: Reserved for future extensions, ignore on GET, write 0 for SET.
  */
 struct ethtool_fecparam {
 	__u32   cmd;
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index d2c7ad494a9f..a307506aa3ff 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -2491,6 +2491,9 @@ static int ethtool_get_fecparam(struct net_device *dev, void __user *useraddr)
 	if (rc)
 		return rc;
 
+	if (WARN_ON_ONCE(fecparam.reserved))
+		fecparam.reserved = 0;
+
 	if (copy_to_user(useraddr, &fecparam, sizeof(fecparam)))
 		return -EFAULT;
 	return 0;
@@ -2506,6 +2509,8 @@ static int ethtool_set_fecparam(struct net_device *dev, void __user *useraddr)
 	if (copy_from_user(&fecparam, useraddr, sizeof(fecparam)))
 		return -EFAULT;
 
+	fecparam.reserved = 0;
+
 	return dev->ethtool_ops->set_fecparam(dev, &fecparam);
 }