fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / drivers / infiniband / hw / ipath / ipath_verbs_mcast.c

diff --git a/drivers/infiniband/hw/ipath/ipath_verbs_mcast.c b/drivers/infiniband/hw/ipath/ipath_verbs_mcast.c
index ee0e1d9..085e28b 100644 (file)
--- a/drivers/infiniband/hw/ipath/ipath_verbs_mcast.c
+++ b/drivers/infiniband/hw/ipath/ipath_verbs_mcast.c
@@ -207,12 +207,17 @@ static int ipath_mcast_add(struct ipath_ibdev *dev,
                goto bail;
        }
 
+       spin_lock(&dev->n_mcast_grps_lock);
        if (dev->n_mcast_grps_allocated == ib_ipath_max_mcast_grps) {
+               spin_unlock(&dev->n_mcast_grps_lock);
                ret = ENOMEM;
                goto bail;
        }
 
        dev->n_mcast_grps_allocated++;
+       spin_unlock(&dev->n_mcast_grps_lock);
+
+       mcast->n_attached++;
 
        list_add_tail_rcu(&mqp->list, &mcast->qp_list);
 
@@ -343,7 +348,9 @@ int ipath_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
                atomic_dec(&mcast->refcount);
                wait_event(mcast->wait, !atomic_read(&mcast->refcount));
                ipath_mcast_free(mcast);
+               spin_lock(&dev->n_mcast_grps_lock);
                dev->n_mcast_grps_allocated--;
+               spin_unlock(&dev->n_mcast_grps_lock);
        }
 
        ret = 0;