Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / drivers / infiniband / ulp / ipoib / ipoib_main.c

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index cb078a7..cf71d2a 100644 (file)
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -185,8 +185,7 @@ static int ipoib_change_mtu(struct net_device *dev, int new_mtu)
        return 0;
 }
 
-static struct ipoib_path *__path_find(struct net_device *dev,
-                                     union ib_gid *gid)
+static struct ipoib_path *__path_find(struct net_device *dev, void *gid)
 {
        struct ipoib_dev_priv *priv = netdev_priv(dev);
        struct rb_node *n = priv->path_tree.rb_node;
@@ -196,7 +195,7 @@ static struct ipoib_path *__path_find(struct net_device *dev,
        while (n) {
                path = rb_entry(n, struct ipoib_path, rb_node);
 
-               ret = memcmp(gid->raw, path->pathrec.dgid.raw,
+               ret = memcmp(gid, path->pathrec.dgid.raw,
                             sizeof (union ib_gid));
 
                if (ret < 0)
@@ -405,6 +404,8 @@ static void path_rec_completion(int status,
                list_for_each_entry(neigh, &path->neigh_list, list) {
                        kref_get(&path->ah->ref);
                        neigh->ah = path->ah;
+                       memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
+                              sizeof(union ib_gid));
 
                        while ((skb = __skb_dequeue(&neigh->queue)))
                                __skb_queue_tail(&skqueue, skb);
@@ -424,8 +425,7 @@ static void path_rec_completion(int status,
        }
 }
 
-static struct ipoib_path *path_rec_create(struct net_device *dev,
-                                         union ib_gid *gid)
+static struct ipoib_path *path_rec_create(struct net_device *dev, void *gid)
 {
        struct ipoib_dev_priv *priv = netdev_priv(dev);
        struct ipoib_path *path;
@@ -440,7 +440,7 @@ static struct ipoib_path *path_rec_create(struct net_device *dev,
 
        INIT_LIST_HEAD(&path->neigh_list);
 
-       memcpy(path->pathrec.dgid.raw, gid->raw, sizeof (union ib_gid));
+       memcpy(path->pathrec.dgid.raw, gid, sizeof (union ib_gid));
        path->pathrec.sgid      = priv->local_gid;
        path->pathrec.pkey      = cpu_to_be16(priv->pkey);
        path->pathrec.numb_path = 1;
@@ -498,10 +498,9 @@ static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
         */
        spin_lock(&priv->lock);
 
-       path = __path_find(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4));
+       path = __path_find(dev, skb->dst->neighbour->ha + 4);
        if (!path) {
-               path = path_rec_create(dev,
-                                      (union ib_gid *) (skb->dst->neighbour->ha + 4));
+               path = path_rec_create(dev, skb->dst->neighbour->ha + 4);
                if (!path)
                        goto err_path;
 
@@ -513,6 +512,8 @@ static void neigh_add_path(struct sk_buff *skb, struct net_device *dev)
        if (path->ah) {
                kref_get(&path->ah->ref);
                neigh->ah = path->ah;
+               memcpy(&neigh->dgid.raw, &path->pathrec.dgid.raw,
+                      sizeof(union ib_gid));
 
                ipoib_send(dev, skb, path->ah,
                           be32_to_cpup((__be32 *) skb->dst->neighbour->ha));
@@ -551,7 +552,7 @@ static void ipoib_path_lookup(struct sk_buff *skb, struct net_device *dev)
        /* Add in the P_Key for multicasts */
        skb->dst->neighbour->ha[8] = (priv->pkey >> 8) & 0xff;
        skb->dst->neighbour->ha[9] = priv->pkey & 0xff;
-       ipoib_mcast_send(dev, (union ib_gid *) (skb->dst->neighbour->ha + 4), skb);
+       ipoib_mcast_send(dev, skb->dst->neighbour->ha + 4, skb);
 }
 
 static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
@@ -566,10 +567,9 @@ static void unicast_arp_send(struct sk_buff *skb, struct net_device *dev,
         */
        spin_lock(&priv->lock);
 
-       path = __path_find(dev, (union ib_gid *) (phdr->hwaddr + 4));
+       path = __path_find(dev, phdr->hwaddr + 4);
        if (!path) {
-               path = path_rec_create(dev,
-                                      (union ib_gid *) (phdr->hwaddr + 4));
+               path = path_rec_create(dev, phdr->hwaddr + 4);
                if (path) {
                        /* put pseudoheader back on for next time */
                        skb_push(skb, sizeof *phdr);
@@ -637,6 +637,25 @@ static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
                neigh = *to_ipoib_neigh(skb->dst->neighbour);
 
                if (likely(neigh->ah)) {
+                       if (unlikely(memcmp(&neigh->dgid.raw,
+                                           skb->dst->neighbour->ha + 4,
+                                           sizeof(union ib_gid)))) {
+                               spin_lock(&priv->lock);
+                               /*
+                                * It's safe to call ipoib_put_ah() inside
+                                * priv->lock here, because we know that
+                                * path->ah will always hold one more reference,
+                                * so ipoib_put_ah() will never do more than
+                                * decrement the ref count.
+                                */
+                               ipoib_put_ah(neigh->ah);
+                               list_del(&neigh->list);
+                               ipoib_neigh_free(neigh);
+                               spin_unlock(&priv->lock);
+                               ipoib_path_lookup(skb, dev);
+                               goto out;
+                       }
+
                        ipoib_send(dev, skb, neigh->ah,
                                   be32_to_cpup((__be32 *) skb->dst->neighbour->ha));
                        goto out;
@@ -660,7 +679,7 @@ static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
                        phdr->hwaddr[8] = (priv->pkey >> 8) & 0xff;
                        phdr->hwaddr[9] = priv->pkey & 0xff;
 
-                       ipoib_mcast_send(dev, (union ib_gid *) (phdr->hwaddr + 4), skb);
+                       ipoib_mcast_send(dev, phdr->hwaddr + 4, skb);
                } else {
                        /* unicast GID -- should be ARP or RARP reply */
 
@@ -671,7 +690,7 @@ static int ipoib_start_xmit(struct sk_buff *skb, struct net_device *dev)
                                           skb->dst ? "neigh" : "dst",
                                           be16_to_cpup((__be16 *) skb->data),
                                           be32_to_cpup((__be32 *) phdr->hwaddr),
-                                          IPOIB_GID_ARG(*(union ib_gid *) (phdr->hwaddr + 4)));
+                                          IPOIB_GID_RAW_ARG(phdr->hwaddr + 4));
                                dev_kfree_skb_any(skb);
                                ++priv->stats.tx_dropped;
                                goto out;
@@ -754,7 +773,7 @@ static void ipoib_neigh_destructor(struct neighbour *n)
        ipoib_dbg(priv,
                  "neigh_destructor for %06x " IPOIB_GID_FMT "\n",
                  be32_to_cpup((__be32 *) n->ha),
-                 IPOIB_GID_ARG(*((union ib_gid *) (n->ha + 4))));
+                 IPOIB_GID_RAW_ARG(n->ha + 4));
 
        spin_lock_irqsave(&priv->lock, flags);