So something like this should be good enough:
--- infiniband/ulp/ipoib/ipoib_multicast.c (revision 5337)
+++ infiniband/ulp/ipoib/ipoib_multicast.c (working copy)
@@ -533,8 +533,10 @@ void ipoib_mcast_join_task(void *dev_ptr
}
if (!priv->broadcast) {
- priv->broadcast = ipoib_mcast_alloc(dev, 1);
- if (!priv->broadcast) {
+ struct ipoib_mcast *broadcast;
+
+ broadcast = ipoib_mcast_alloc(dev, 1);
+ if (!broadcast) {
ipoib_warn(priv, "failed to allocate broadcast
group\n");
mutex_lock(&mcast_mutex);
if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
@@ -544,10 +546,11 @@ void ipoib_mcast_join_task(void *dev_ptr
return;
}
- memcpy(priv->broadcast->mcmember.mgid.raw, priv->dev->broadcast
+ 4,
+ spin_lock_irq(&priv->lock);
+ memcpy(broadcast->mcmember.mgid.raw, priv->dev->broadcast + 4,
sizeof (union ib_gid));
+ priv->broadcast = broadcast;
- spin_lock_irq(&priv->lock);
__ipoib_mcast_add(dev, priv->broadcast);
spin_unlock_irq(&priv->lock);
}
@@ -701,7 +704,9 @@ void ipoib_mcast_send(struct net_device
*/
spin_lock(&priv->lock);
- if (!test_bit(IPOIB_MCAST_STARTED, &priv->flags) || !priv->broadcast) {
+ if (!test_bit(IPOIB_MCAST_STARTED, &priv->flags) ||
+ !priv->broadcast ||
+ !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
++priv->stats.tx_dropped;
dev_kfree_skb_any(skb);
goto unlock;
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