From 3a807b751c66e76bff39da4a9bd9828d7866d025 Mon Sep 17 00:00:00 2001
From: John Allen <jallen@linux.vnet.ibm.com>
Date: Tue, 6 Jun 2017 16:55:52 -0500
Subject: [PATCH] ibmvnic: Return failure on attempted mtu change
Changing the mtu is currently not supported in the ibmvnic driver.
Implement .ndo_change_mtu in the driver so that attempting to use ifconfig
to change the mtu will fail and present the user with an error message.
Signed-off-by: John Allen <jallen@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/ibm/ibmvnic.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index a93757c255f77..c0fbeb387db46 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1468,6 +1468,11 @@ static void ibmvnic_netpoll_controller(struct net_device *dev)
}
#endif
+static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
+{
+ return -EOPNOTSUPP;
+}
+
static const struct net_device_ops ibmvnic_netdev_ops = {
.ndo_open = ibmvnic_open,
.ndo_stop = ibmvnic_close,
@@ -1479,6 +1484,7 @@ static const struct net_device_ops ibmvnic_netdev_ops = {
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = ibmvnic_netpoll_controller,
#endif
+ .ndo_change_mtu = ibmvnic_change_mtu,
};
/* ethtool functions */
--
2.30.2