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authorRoland Dreier <rolandd@cisco.com>2006-02-11 12:22:12 -0800
committerRoland Dreier <rolandd@cisco.com>2006-02-11 12:22:12 -0800
commit20b83382d1c5d4d1a73fc5671261db5239d1dbb3 (patch)
tree331685789ab2d86b1e126b0eb7c997642150d5d8 /drivers
parentf295c79b6766b25fe8c1aad88211c54d1caa7e0b (diff)
IPoIB: Yet another fix for send-only joins
Even after the last fix, it's still possible for a send-only join to start before the join for the broadcast group has finished. This could cause us to create a multicast group using attributes from the broadcast group that haven't been initialized yet, so we would use garbage for the Q_Key, etc. Fix this by waiting until the broadcast group's attached flag is set before starting send-only joins. Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib_multicast.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
index 932bf139a65..a2408d7ec59 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c
@@ -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 *dev, union ib_gid *mgid,
*/
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;