1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
index d00a2c174aee..3f663fb852c1 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
@@ -194,7 +194,13 @@ static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
         /* Set the cached Q_Key before we attach if it's the broadcast group */
         if (!memcmp(mcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
                     sizeof (union ib_gid))) {
+                spin_lock_irq(&priv->lock);
+                if (!priv->broadcast) {
+                        spin_unlock_irq(&priv->lock);
+                        return -EAGAIN;
+                }
                 priv->qkey = be32_to_cpu(priv->broadcast->mcmember.qkey);
+                spin_unlock_irq(&priv->lock);
                 priv->tx_wr.wr.ud.remote_qkey = priv->qkey;
         }