WorkStruct: make allyesconfig
[safe/jmp/linux-2.6] / drivers / infiniband / ulp / ipoib / ipoib_multicast.c
index e03b070..f0a4fac 100644 (file)
@@ -43,6 +43,8 @@
 #include <linux/delay.h>
 #include <linux/completion.h>
 
+#include <net/dst.h>
+
 #include "ipoib.h"
 
 #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
@@ -53,7 +55,7 @@ MODULE_PARM_DESC(mcast_debug_level,
                 "Enable multicast debug tracing if > 0");
 #endif
 
-static DECLARE_MUTEX(mcast_mutex);
+static DEFINE_MUTEX(mcast_mutex);
 
 /* Used for all multicast joins (broadcast, IPv4 mcast and IPv6 mcast) */
 struct ipoib_mcast {
@@ -95,8 +97,7 @@ static void ipoib_mcast_free(struct ipoib_mcast *mcast)
        struct ipoib_dev_priv *priv = netdev_priv(dev);
        struct ipoib_neigh *neigh, *tmp;
        unsigned long flags;
-       LIST_HEAD(ah_list);
-       struct ipoib_ah *ah, *tah;
+       int tx_dropped = 0;
 
        ipoib_dbg_mcast(netdev_priv(dev),
                        "deleting multicast group " IPOIB_GID_FMT "\n",
@@ -105,28 +106,31 @@ static void ipoib_mcast_free(struct ipoib_mcast *mcast)
        spin_lock_irqsave(&priv->lock, flags);
 
        list_for_each_entry_safe(neigh, tmp, &mcast->neigh_list, list) {
+               /*
+                * It's safe to call ipoib_put_ah() inside priv->lock
+                * here, because we know that mcast->ah will always
+                * hold one more reference, so ipoib_put_ah() will
+                * never do more than decrement the ref count.
+                */
                if (neigh->ah)
-                       list_add_tail(&neigh->ah->list, &ah_list);
-               *to_ipoib_neigh(neigh->neighbour) = NULL;
-               neigh->neighbour->ops->destructor = NULL;
-               kfree(neigh);
+                       ipoib_put_ah(neigh->ah);
+               ipoib_neigh_free(neigh);
        }
 
        spin_unlock_irqrestore(&priv->lock, flags);
 
-       list_for_each_entry_safe(ah, tah, &ah_list, list)
-               ipoib_put_ah(ah);
-
        if (mcast->ah)
                ipoib_put_ah(mcast->ah);
 
        while (!skb_queue_empty(&mcast->pkt_queue)) {
-               struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
-
-               skb->dev = dev;
-               dev_kfree_skb_any(skb);
+               ++tx_dropped;
+               dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
        }
 
+       spin_lock_irqsave(&priv->tx_lock, flags);
+       priv->stats.tx_dropped += tx_dropped;
+       spin_unlock_irqrestore(&priv->tx_lock, flags);
+
        kfree(mcast);
 }
 
@@ -135,30 +139,22 @@ static struct ipoib_mcast *ipoib_mcast_alloc(struct net_device *dev,
 {
        struct ipoib_mcast *mcast;
 
-       mcast = kmalloc(sizeof (*mcast), can_sleep ? GFP_KERNEL : GFP_ATOMIC);
+       mcast = kzalloc(sizeof *mcast, can_sleep ? GFP_KERNEL : GFP_ATOMIC);
        if (!mcast)
                return NULL;
 
-       memset(mcast, 0, sizeof (*mcast));
-
-       init_completion(&mcast->done);
-
        mcast->dev = dev;
        mcast->created = jiffies;
-       mcast->backoff = HZ;
-       mcast->logcount = 0;
+       mcast->backoff = 1;
 
        INIT_LIST_HEAD(&mcast->list);
        INIT_LIST_HEAD(&mcast->neigh_list);
        skb_queue_head_init(&mcast->pkt_queue);
 
-       mcast->ah    = NULL;
-       mcast->query = NULL;
-
        return mcast;
 }
 
-static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, union ib_gid *mgid)
+static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, void *mgid)
 {
        struct ipoib_dev_priv *priv = netdev_priv(dev);
        struct rb_node *n = priv->multicast_tree.rb_node;
@@ -169,7 +165,7 @@ static struct ipoib_mcast *__ipoib_mcast_find(struct net_device *dev, union ib_g
 
                mcast = rb_entry(n, struct ipoib_mcast, rb_node);
 
-               ret = memcmp(mgid->raw, mcast->mcmember.mgid.raw,
+               ret = memcmp(mgid, mcast->mcmember.mgid.raw,
                             sizeof (union ib_gid));
                if (ret < 0)
                        n = n->rb_left;
@@ -215,6 +211,7 @@ static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
 {
        struct net_device *dev = mcast->dev;
        struct ipoib_dev_priv *priv = netdev_priv(dev);
+       struct ipoib_ah *ah;
        int ret;
 
        mcast->mcmember = *mcmember;
@@ -253,6 +250,7 @@ static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
                        .port_num      = priv->port,
                        .sl            = mcast->mcmember.sl,
                        .ah_flags      = IB_AH_GRH,
+                       .static_rate   = mcast->mcmember.rate,
                        .grh           = {
                                .flow_label    = be32_to_cpu(mcast->mcmember.flow_label),
                                .hop_limit     = mcast->mcmember.hop_limit,
@@ -260,21 +258,16 @@ static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
                                .traffic_class = mcast->mcmember.traffic_class
                        }
                };
-               int path_rate = ib_sa_rate_enum_to_int(mcast->mcmember.rate);
-
                av.grh.dgid = mcast->mcmember.mgid;
 
-               if (path_rate > 0 && priv->local_rate > path_rate)
-                       av.static_rate = (priv->local_rate - 1) / path_rate;
-
-               ipoib_dbg_mcast(priv, "static_rate %d for local port %dX, mcmember %dX\n",
-                               av.static_rate, priv->local_rate,
-                               ib_sa_rate_enum_to_int(mcast->mcmember.rate));
-
-               mcast->ah = ipoib_create_ah(dev, priv->pd, &av);
-               if (!mcast->ah) {
+               ah = ipoib_create_ah(dev, priv->pd, &av);
+               if (!ah) {
                        ipoib_warn(priv, "ib_address_create failed\n");
                } else {
+                       spin_lock_irq(&priv->lock);
+                       mcast->ah = ah;
+                       spin_unlock_irq(&priv->lock);
+
                        ipoib_dbg_mcast(priv, "MGID " IPOIB_GID_FMT
                                        " AV %p, LID 0x%04x, SL %d\n",
                                        IPOIB_GID_ARG(mcast->mcmember.mgid),
@@ -285,8 +278,10 @@ static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
        }
 
        /* actually send any queued packets */
+       spin_lock_irq(&priv->tx_lock);
        while (!skb_queue_empty(&mcast->pkt_queue)) {
                struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
+               spin_unlock_irq(&priv->tx_lock);
 
                skb->dev = dev;
 
@@ -297,7 +292,9 @@ static int ipoib_mcast_join_finish(struct ipoib_mcast *mcast,
 
                if (dev_queue_xmit(skb))
                        ipoib_warn(priv, "dev_queue_xmit failed to requeue packet\n");
+               spin_lock_irq(&priv->tx_lock);
        }
+       spin_unlock_irq(&priv->tx_lock);
 
        return 0;
 }
@@ -309,6 +306,7 @@ ipoib_mcast_sendonly_join_complete(int status,
 {
        struct ipoib_mcast *mcast = mcast_ptr;
        struct net_device *dev = mcast->dev;
+       struct ipoib_dev_priv *priv = netdev_priv(dev);
 
        if (!status)
                ipoib_mcast_join_finish(mcast, mcmember);
@@ -319,16 +317,16 @@ ipoib_mcast_sendonly_join_complete(int status,
                                        IPOIB_GID_ARG(mcast->mcmember.mgid), status);
 
                /* Flush out any queued packets */
+               spin_lock_irq(&priv->tx_lock);
                while (!skb_queue_empty(&mcast->pkt_queue)) {
-                       struct sk_buff *skb = skb_dequeue(&mcast->pkt_queue);
-
-                       skb->dev = dev;
-
-                       dev_kfree_skb_any(skb);
+                       ++priv->stats.tx_dropped;
+                       dev_kfree_skb_any(skb_dequeue(&mcast->pkt_queue));
                }
+               spin_unlock_irq(&priv->tx_lock);
 
                /* Clear the busy flag so we try again */
                clear_bit(IPOIB_MCAST_FLAG_BUSY, &mcast->flags);
+               mcast->query = NULL;
        }
 
        complete(&mcast->done);
@@ -359,9 +357,11 @@ static int ipoib_mcast_sendonly_join(struct ipoib_mcast *mcast)
 
        rec.mgid     = mcast->mcmember.mgid;
        rec.port_gid = priv->local_gid;
-       rec.pkey     = be16_to_cpu(priv->pkey);
+       rec.pkey     = cpu_to_be16(priv->pkey);
+
+       init_completion(&mcast->done);
 
-       ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec,
+       ret = ib_sa_mcmember_rec_set(&ipoib_sa_client, priv->ca, priv->port, &rec,
                                     IB_SA_MCMEMBER_REC_MGID            |
                                     IB_SA_MCMEMBER_REC_PORT_GID        |
                                     IB_SA_MCMEMBER_REC_PKEY            |
@@ -396,11 +396,12 @@ static void ipoib_mcast_join_complete(int status,
                        IPOIB_GID_ARG(mcast->mcmember.mgid), status);
 
        if (!status && !ipoib_mcast_join_finish(mcast, mcmember)) {
-               mcast->backoff = HZ;
-               down(&mcast_mutex);
+               mcast->backoff = 1;
+               mutex_lock(&mcast_mutex);
                if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
-                       queue_work(ipoib_workqueue, &priv->mcast_task);
-               up(&mcast_mutex);
+                       queue_delayed_work(ipoib_workqueue,
+                                          &priv->mcast_task, 0);
+               mutex_unlock(&mcast_mutex);
                complete(&mcast->done);
                return;
        }
@@ -428,18 +429,22 @@ static void ipoib_mcast_join_complete(int status,
        if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
                mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
 
+       mutex_lock(&mcast_mutex);
+
+       spin_lock_irq(&priv->lock);
        mcast->query = NULL;
 
-       down(&mcast_mutex);
        if (test_bit(IPOIB_MCAST_RUN, &priv->flags)) {
                if (status == -ETIMEDOUT)
-                       queue_work(ipoib_workqueue, &priv->mcast_task);
+                       queue_delayed_work(ipoib_workqueue, &priv->mcast_task,
+                                          0);
                else
                        queue_delayed_work(ipoib_workqueue, &priv->mcast_task,
                                           mcast->backoff * HZ);
        } else
                complete(&mcast->done);
-       up(&mcast_mutex);
+       spin_unlock_irq(&priv->lock);
+       mutex_unlock(&mcast_mutex);
 
        return;
 }
@@ -459,7 +464,7 @@ static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
 
        rec.mgid     = mcast->mcmember.mgid;
        rec.port_gid = priv->local_gid;
-       rec.pkey     = be16_to_cpu(priv->pkey);
+       rec.pkey     = cpu_to_be16(priv->pkey);
 
        comp_mask =
                IB_SA_MCMEMBER_REC_MGID         |
@@ -469,20 +474,32 @@ static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
 
        if (create) {
                comp_mask |=
-                       IB_SA_MCMEMBER_REC_QKEY         |
-                       IB_SA_MCMEMBER_REC_SL           |
-                       IB_SA_MCMEMBER_REC_FLOW_LABEL   |
-                       IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
+                       IB_SA_MCMEMBER_REC_QKEY                 |
+                       IB_SA_MCMEMBER_REC_MTU_SELECTOR         |
+                       IB_SA_MCMEMBER_REC_MTU                  |
+                       IB_SA_MCMEMBER_REC_TRAFFIC_CLASS        |
+                       IB_SA_MCMEMBER_REC_RATE_SELECTOR        |
+                       IB_SA_MCMEMBER_REC_RATE                 |
+                       IB_SA_MCMEMBER_REC_SL                   |
+                       IB_SA_MCMEMBER_REC_FLOW_LABEL           |
+                       IB_SA_MCMEMBER_REC_HOP_LIMIT;
 
                rec.qkey          = priv->broadcast->mcmember.qkey;
+               rec.mtu_selector  = IB_SA_EQ;
+               rec.mtu           = priv->broadcast->mcmember.mtu;
+               rec.traffic_class = priv->broadcast->mcmember.traffic_class;
+               rec.rate_selector = IB_SA_EQ;
+               rec.rate          = priv->broadcast->mcmember.rate;
                rec.sl            = priv->broadcast->mcmember.sl;
                rec.flow_label    = priv->broadcast->mcmember.flow_label;
-               rec.traffic_class = priv->broadcast->mcmember.traffic_class;
+               rec.hop_limit     = priv->broadcast->mcmember.hop_limit;
        }
 
-       ret = ib_sa_mcmember_rec_set(priv->ca, priv->port, &rec, comp_mask,
-                                    mcast->backoff * 1000, GFP_ATOMIC,
-                                    ipoib_mcast_join_complete,
+       init_completion(&mcast->done);
+
+       ret = ib_sa_mcmember_rec_set(&ipoib_sa_client, priv->ca, priv->port,
+                                    &rec, comp_mask, mcast->backoff * 1000,
+                                    GFP_ATOMIC, ipoib_mcast_join_complete,
                                     mcast, &mcast->query);
 
        if (ret < 0) {
@@ -492,20 +509,21 @@ static void ipoib_mcast_join(struct net_device *dev, struct ipoib_mcast *mcast,
                if (mcast->backoff > IPOIB_MAX_BACKOFF_SECONDS)
                        mcast->backoff = IPOIB_MAX_BACKOFF_SECONDS;
 
-               down(&mcast_mutex);
+               mutex_lock(&mcast_mutex);
                if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
                        queue_delayed_work(ipoib_workqueue,
                                           &priv->mcast_task,
-                                          mcast->backoff);
-               up(&mcast_mutex);
+                                          mcast->backoff * HZ);
+               mutex_unlock(&mcast_mutex);
        } else
                mcast->query_id = ret;
 }
 
-void ipoib_mcast_join_task(void *dev_ptr)
+void ipoib_mcast_join_task(struct work_struct *work)
 {
-       struct net_device *dev = dev_ptr;
-       struct ipoib_dev_priv *priv = netdev_priv(dev);
+       struct ipoib_dev_priv *priv =
+               container_of(work, struct ipoib_dev_priv, mcast_task.work);
+       struct net_device *dev = priv->dev;
 
        if (!test_bit(IPOIB_MCAST_RUN, &priv->flags))
                return;
@@ -523,25 +541,28 @@ void ipoib_mcast_join_task(void *dev_ptr)
                        priv->local_rate = attr.active_speed *
                                ib_width_enum_to_int(attr.active_width);
                } else
-                       ipoib_warn(priv, "ib_query_port failed\n");
+               ipoib_warn(priv, "ib_query_port failed\n");
        }
 
        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");
-                       down(&mcast_mutex);
+                       mutex_lock(&mcast_mutex);
                        if (test_bit(IPOIB_MCAST_RUN, &priv->flags))
                                queue_delayed_work(ipoib_workqueue,
                                                   &priv->mcast_task, HZ);
-                       up(&mcast_mutex);
+                       mutex_unlock(&mcast_mutex);
                        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);
        }
@@ -590,44 +611,57 @@ int ipoib_mcast_start_thread(struct net_device *dev)
 
        ipoib_dbg_mcast(priv, "starting multicast thread\n");
 
-       down(&mcast_mutex);
+       mutex_lock(&mcast_mutex);
        if (!test_and_set_bit(IPOIB_MCAST_RUN, &priv->flags))
-               queue_work(ipoib_workqueue, &priv->mcast_task);
-       up(&mcast_mutex);
+               queue_delayed_work(ipoib_workqueue, &priv->mcast_task, 0);
+       mutex_unlock(&mcast_mutex);
+
+       spin_lock_irq(&priv->lock);
+       set_bit(IPOIB_MCAST_STARTED, &priv->flags);
+       spin_unlock_irq(&priv->lock);
 
        return 0;
 }
 
-int ipoib_mcast_stop_thread(struct net_device *dev)
+static void wait_for_mcast_join(struct ipoib_dev_priv *priv,
+                               struct ipoib_mcast *mcast)
+{
+       spin_lock_irq(&priv->lock);
+       if (mcast && mcast->query) {
+               ib_sa_cancel_query(mcast->query_id, mcast->query);
+               mcast->query = NULL;
+               spin_unlock_irq(&priv->lock);
+               ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT "\n",
+                               IPOIB_GID_ARG(mcast->mcmember.mgid));
+               wait_for_completion(&mcast->done);
+       }
+       else
+               spin_unlock_irq(&priv->lock);
+}
+
+int ipoib_mcast_stop_thread(struct net_device *dev, int flush)
 {
        struct ipoib_dev_priv *priv = netdev_priv(dev);
        struct ipoib_mcast *mcast;
 
        ipoib_dbg_mcast(priv, "stopping multicast thread\n");
 
-       down(&mcast_mutex);
+       spin_lock_irq(&priv->lock);
+       clear_bit(IPOIB_MCAST_STARTED, &priv->flags);
+       spin_unlock_irq(&priv->lock);
+
+       mutex_lock(&mcast_mutex);
        clear_bit(IPOIB_MCAST_RUN, &priv->flags);
        cancel_delayed_work(&priv->mcast_task);
-       up(&mcast_mutex);
+       mutex_unlock(&mcast_mutex);
 
-       flush_workqueue(ipoib_workqueue);
+       if (flush)
+               flush_workqueue(ipoib_workqueue);
 
-       if (priv->broadcast && priv->broadcast->query) {
-               ib_sa_cancel_query(priv->broadcast->query_id, priv->broadcast->query);
-               priv->broadcast->query = NULL;
-               ipoib_dbg_mcast(priv, "waiting for bcast\n");
-               wait_for_completion(&priv->broadcast->done);
-       }
+       wait_for_mcast_join(priv, priv->broadcast);
 
-       list_for_each_entry(mcast, &priv->multicast_list, list) {
-               if (mcast->query) {
-                       ib_sa_cancel_query(mcast->query_id, mcast->query);
-                       mcast->query = NULL;
-                       ipoib_dbg_mcast(priv, "waiting for MGID " IPOIB_GID_FMT "\n",
-                                       IPOIB_GID_ARG(mcast->mcmember.mgid));
-                       wait_for_completion(&mcast->done);
-               }
-       }
+       list_for_each_entry(mcast, &priv->multicast_list, list)
+               wait_for_mcast_join(priv, mcast);
 
        return 0;
 }
@@ -648,7 +682,7 @@ static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
 
        rec.mgid     = mcast->mcmember.mgid;
        rec.port_gid = priv->local_gid;
-       rec.pkey     = be16_to_cpu(priv->pkey);
+       rec.pkey     = cpu_to_be16(priv->pkey);
 
        /* Remove ourselves from the multicast group */
        ret = ipoib_mcast_detach(dev, be16_to_cpu(mcast->mcmember.mlid),
@@ -660,7 +694,7 @@ static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
         * Just make one shot at leaving and don't wait for a reply;
         * if we fail, too bad.
         */
-       ret = ib_sa_mcmember_rec_delete(priv->ca, priv->port, &rec,
+       ret = ib_sa_mcmember_rec_delete(&ipoib_sa_client, priv->ca, priv->port, &rec,
                                        IB_SA_MCMEMBER_REC_MGID         |
                                        IB_SA_MCMEMBER_REC_PORT_GID     |
                                        IB_SA_MCMEMBER_REC_PKEY         |
@@ -674,8 +708,7 @@ static int ipoib_mcast_leave(struct net_device *dev, struct ipoib_mcast *mcast)
        return 0;
 }
 
-void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid,
-                     struct sk_buff *skb)
+void ipoib_mcast_send(struct net_device *dev, void *mgid, struct sk_buff *skb)
 {
        struct ipoib_dev_priv *priv = netdev_priv(dev);
        struct ipoib_mcast *mcast;
@@ -686,22 +719,31 @@ 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                                    ||
+           !test_bit(IPOIB_MCAST_FLAG_ATTACHED, &priv->broadcast->flags)) {
+               ++priv->stats.tx_dropped;
+               dev_kfree_skb_any(skb);
+               goto unlock;
+       }
+
        mcast = __ipoib_mcast_find(dev, mgid);
        if (!mcast) {
                /* Let's create a new send only group now */
                ipoib_dbg_mcast(priv, "setting up send only multicast group for "
-                               IPOIB_GID_FMT "\n", IPOIB_GID_ARG(*mgid));
+                               IPOIB_GID_FMT "\n", IPOIB_GID_RAW_ARG(mgid));
 
                mcast = ipoib_mcast_alloc(dev, 0);
                if (!mcast) {
                        ipoib_warn(priv, "unable to allocate memory for "
                                   "multicast structure\n");
+                       ++priv->stats.tx_dropped;
                        dev_kfree_skb_any(skb);
                        goto out;
                }
 
                set_bit(IPOIB_MCAST_FLAG_SENDONLY, &mcast->flags);
-               mcast->mcmember.mgid = *mgid;
+               memcpy(mcast->mcmember.mgid.raw, mgid, sizeof (union ib_gid));
                __ipoib_mcast_add(dev, mcast);
                list_add_tail(&mcast->list, &priv->multicast_list);
        }
@@ -709,8 +751,10 @@ void ipoib_mcast_send(struct net_device *dev, union ib_gid *mgid,
        if (!mcast->ah) {
                if (skb_queue_len(&mcast->pkt_queue) < IPOIB_MAX_MCAST_QUEUE)
                        skb_queue_tail(&mcast->pkt_queue, skb);
-               else
+               else {
+                       ++priv->stats.tx_dropped;
                        dev_kfree_skb_any(skb);
+               }
 
                if (mcast->query)
                        ipoib_dbg_mcast(priv, "no address vector, "
@@ -730,13 +774,11 @@ out:
                if (skb->dst            &&
                    skb->dst->neighbour &&
                    !*to_ipoib_neigh(skb->dst->neighbour)) {
-                       struct ipoib_neigh *neigh = kmalloc(sizeof *neigh, GFP_ATOMIC);
+                       struct ipoib_neigh *neigh = ipoib_neigh_alloc(skb->dst->neighbour);
 
                        if (neigh) {
                                kref_get(&mcast->ah->ref);
                                neigh->ah       = mcast->ah;
-                               neigh->neighbour = skb->dst->neighbour;
-                               *to_ipoib_neigh(skb->dst->neighbour) = neigh;
                                list_add_tail(&neigh->list, &mcast->neigh_list);
                        }
                }
@@ -744,6 +786,7 @@ out:
                ipoib_send(dev, skb, mcast->ah, IB_MULTICAST_QPN);
        }
 
+unlock:
        spin_unlock(&priv->lock);
 }
 
@@ -751,48 +794,23 @@ void ipoib_mcast_dev_flush(struct net_device *dev)
 {
        struct ipoib_dev_priv *priv = netdev_priv(dev);
        LIST_HEAD(remove_list);
-       struct ipoib_mcast *mcast, *tmcast, *nmcast;
+       struct ipoib_mcast *mcast, *tmcast;
        unsigned long flags;
 
        ipoib_dbg_mcast(priv, "flushing multicast list\n");
 
        spin_lock_irqsave(&priv->lock, flags);
-       list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
-               nmcast = ipoib_mcast_alloc(dev, 0);
-               if (nmcast) {
-                       nmcast->flags =
-                               mcast->flags & (1 << IPOIB_MCAST_FLAG_SENDONLY);
-
-                       nmcast->mcmember.mgid = mcast->mcmember.mgid;
-
-                       /* Add the new group in before the to-be-destroyed group */
-                       list_add_tail(&nmcast->list, &mcast->list);
-                       list_del_init(&mcast->list);
-
-                       rb_replace_node(&mcast->rb_node, &nmcast->rb_node,
-                                       &priv->multicast_tree);
 
-                       list_add_tail(&mcast->list, &remove_list);
-               } else {
-                       ipoib_warn(priv, "could not reallocate multicast group "
-                                  IPOIB_GID_FMT "\n",
-                                  IPOIB_GID_ARG(mcast->mcmember.mgid));
-               }
+       list_for_each_entry_safe(mcast, tmcast, &priv->multicast_list, list) {
+               list_del(&mcast->list);
+               rb_erase(&mcast->rb_node, &priv->multicast_tree);
+               list_add_tail(&mcast->list, &remove_list);
        }
 
        if (priv->broadcast) {
-               nmcast = ipoib_mcast_alloc(dev, 0);
-               if (nmcast) {
-                       nmcast->mcmember.mgid = priv->broadcast->mcmember.mgid;
-
-                       rb_replace_node(&priv->broadcast->rb_node,
-                                       &nmcast->rb_node,
-                                       &priv->multicast_tree);
-
-                       list_add_tail(&priv->broadcast->list, &remove_list);
-               }
-
-               priv->broadcast = nmcast;
+               rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree);
+               list_add_tail(&priv->broadcast->list, &remove_list);
+               priv->broadcast = NULL;
        }
 
        spin_unlock_irqrestore(&priv->lock, flags);
@@ -803,28 +821,11 @@ void ipoib_mcast_dev_flush(struct net_device *dev)
        }
 }
 
-void ipoib_mcast_dev_down(struct net_device *dev)
-{
-       struct ipoib_dev_priv *priv = netdev_priv(dev);
-       unsigned long flags;
-
-       /* Delete broadcast since it will be recreated */
-       if (priv->broadcast) {
-               ipoib_dbg_mcast(priv, "deleting broadcast group\n");
-
-               spin_lock_irqsave(&priv->lock, flags);
-               rb_erase(&priv->broadcast->rb_node, &priv->multicast_tree);
-               spin_unlock_irqrestore(&priv->lock, flags);
-               ipoib_mcast_leave(dev, priv->broadcast);
-               ipoib_mcast_free(priv->broadcast);
-               priv->broadcast = NULL;
-       }
-}
-
-void ipoib_mcast_restart_task(void *dev_ptr)
+void ipoib_mcast_restart_task(struct work_struct *work)
 {
-       struct net_device *dev = dev_ptr;
-       struct ipoib_dev_priv *priv = netdev_priv(dev);
+       struct ipoib_dev_priv *priv =
+               container_of(work, struct ipoib_dev_priv, restart_task);
+       struct net_device *dev = priv->dev;
        struct dev_mc_list *mclist;
        struct ipoib_mcast *mcast, *tmcast;
        LIST_HEAD(remove_list);
@@ -832,9 +833,11 @@ void ipoib_mcast_restart_task(void *dev_ptr)
 
        ipoib_dbg_mcast(priv, "restarting multicast task\n");
 
-       ipoib_mcast_stop_thread(dev);
+       ipoib_mcast_stop_thread(dev, 0);
 
-       spin_lock_irqsave(&priv->lock, flags);
+       local_irq_save(flags);
+       netif_tx_lock(dev);
+       spin_lock(&priv->lock);
 
        /*
         * Unfortunately, the networking core only gives us a list of all of
@@ -876,8 +879,7 @@ void ipoib_mcast_restart_task(void *dev_ptr)
 
                        if (mcast) {
                                /* Destroy the send only entry */
-                               list_del(&mcast->list);
-                               list_add_tail(&mcast->list, &remove_list);
+                               list_move_tail(&mcast->list, &remove_list);
 
                                rb_replace_node(&mcast->rb_node,
                                                &nmcast->rb_node,
@@ -902,14 +904,17 @@ void ipoib_mcast_restart_task(void *dev_ptr)
                        rb_erase(&mcast->rb_node, &priv->multicast_tree);
 
                        /* Move to the remove list */
-                       list_del(&mcast->list);
-                       list_add_tail(&mcast->list, &remove_list);
+                       list_move_tail(&mcast->list, &remove_list);
                }
        }
-       spin_unlock_irqrestore(&priv->lock, flags);
+
+       spin_unlock(&priv->lock);
+       netif_tx_unlock(dev);
+       local_irq_restore(flags);
 
        /* We have to cancel outside of the spinlock */
        list_for_each_entry_safe(mcast, tmcast, &remove_list, list) {
+               wait_for_mcast_join(priv, mcast);
                ipoib_mcast_leave(mcast->dev, mcast);
                ipoib_mcast_free(mcast);
        }
@@ -918,6 +923,8 @@ void ipoib_mcast_restart_task(void *dev_ptr)
                ipoib_mcast_start_thread(dev);
 }
 
+#ifdef CONFIG_INFINIBAND_IPOIB_DEBUG
+
 struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev)
 {
        struct ipoib_mcast_iter *iter;
@@ -927,21 +934,16 @@ struct ipoib_mcast_iter *ipoib_mcast_iter_init(struct net_device *dev)
                return NULL;
 
        iter->dev = dev;
-       memset(iter->mgid.raw, 0, sizeof iter->mgid);
+       memset(iter->mgid.raw, 0, 16);
 
        if (ipoib_mcast_iter_next(iter)) {
-               ipoib_mcast_iter_free(iter);
+               kfree(iter);
                return NULL;
        }
 
        return iter;
 }
 
-void ipoib_mcast_iter_free(struct ipoib_mcast_iter *iter)
-{
-       kfree(iter);
-}
-
 int ipoib_mcast_iter_next(struct ipoib_mcast_iter *iter)
 {
        struct ipoib_dev_priv *priv = netdev_priv(iter->dev);
@@ -990,3 +992,5 @@ void ipoib_mcast_iter_read(struct ipoib_mcast_iter *iter,
        *complete  = iter->complete;
        *send_only = iter->send_only;
 }
+
+#endif /* CONFIG_INFINIBAND_IPOIB_DEBUG */