IPoIB: Use dev_set_mtu() to change mtu

When the driver sets the MTU of the net device outside of its
change_mtu method, it should make use of dev_set_mtu() instead of
directly setting the mtu field of struct netdevice.  Otherwise
functions registered to be called upon MTU change will not get called
(this is done through call_netdevice_notifiers() in dev_set_mtu()).

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

2 files changed, 2 insertions, 2 deletions

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
index b4269139135b..87f9f3ef3b2d 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
@@ -1458,7 +1458,7 @@ static ssize_t set_mode(struct device *d, struct device_attribute *attr,
                         if (priv->hca_caps & IB_DEVICE_UD_TSO)
                                 dev->features |= NETIF_F_TSO;
                 }
-                dev->mtu = min(priv->mcast_mtu, dev->mtu);
+                dev_set_mtu(dev, min(priv->mcast_mtu, dev->mtu));
                 rtnl_unlock();
                 ipoib_flush_paths(dev);
 
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
index be1ed38cdcfd..1fcc9a898d81 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
@@ -577,7 +577,7 @@ void ipoib_mcast_join_task(struct work_struct *work)
 
         if (!ipoib_cm_admin_enabled(dev)) {
                 rtnl_lock();
-                dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
+                dev_set_mtu(dev, min(priv->mcast_mtu, priv->admin_mtu));
                 rtnl_unlock();
         }