Revert "IPoIB: Consolidate rtnl_lock tasks in workqueue"

This reverts commit afe1de664ef3cb756e70938d99417dcbc6b1379a.

The series of IPoIB bug fixes that went into 3.19-rc1 introduce
regressions, and after trying to sort things out, we decided to revert
to 3.18's IPoIB driver and get things right for 3.20.

Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
index eee66d13e5b9..ffb83b5f7e80 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
@@ -190,6 +190,12 @@ static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
                 spin_unlock_irq(&priv->lock);
                 priv->tx_wr.wr.ud.remote_qkey = priv->qkey;
                 set_qkey = 1;
+
+                if (!ipoib_cm_admin_enabled(dev)) {
+                        rtnl_lock();
+                        dev_set_mtu(dev, min(priv->mcast_mtu, priv->admin_mtu));
+                        rtnl_unlock();
+                }
         }
 
         if (!test_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags)) {
@@ -365,8 +371,6 @@ void ipoib_mcast_carrier_on_task(struct work_struct *work)
         }
 
         rtnl_lock();
-        if (!ipoib_cm_admin_enabled(priv->dev))
-                dev_set_mtu(priv->dev, min(priv->mcast_mtu, priv->admin_mtu));
         netif_carrier_on(priv->dev);
         rtnl_unlock();
 }