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path: root/drivers/infiniband/hw/qib/qib_verbs_mcast.c
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Diffstat (limited to 'drivers/infiniband/hw/qib/qib_verbs_mcast.c')
-rw-r--r--drivers/infiniband/hw/qib/qib_verbs_mcast.c35
1 files changed, 15 insertions, 20 deletions
diff --git a/drivers/infiniband/hw/qib/qib_verbs_mcast.c b/drivers/infiniband/hw/qib/qib_verbs_mcast.c
index f8ea069a3eaf..b2fb5286dbd9 100644
--- a/drivers/infiniband/hw/qib/qib_verbs_mcast.c
+++ b/drivers/infiniband/hw/qib/qib_verbs_mcast.c
@@ -286,15 +286,13 @@ int qib_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
struct qib_ibdev *dev = to_idev(ibqp->device);
struct qib_ibport *ibp = to_iport(ibqp->device, qp->port_num);
struct qib_mcast *mcast = NULL;
- struct qib_mcast_qp *p, *tmp;
+ struct qib_mcast_qp *p, *tmp, *delp = NULL;
struct rb_node *n;
int last = 0;
int ret;
- if (ibqp->qp_num <= 1 || qp->state == IB_QPS_RESET) {
- ret = -EINVAL;
- goto bail;
- }
+ if (ibqp->qp_num <= 1 || qp->state == IB_QPS_RESET)
+ return -EINVAL;
spin_lock_irq(&ibp->lock);
@@ -303,8 +301,7 @@ int qib_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
while (1) {
if (n == NULL) {
spin_unlock_irq(&ibp->lock);
- ret = -EINVAL;
- goto bail;
+ return -EINVAL;
}
mcast = rb_entry(n, struct qib_mcast, rb_node);
@@ -328,6 +325,7 @@ int qib_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
*/
list_del_rcu(&p->list);
mcast->n_attached--;
+ delp = p;
/* If this was the last attached QP, remove the GID too. */
if (list_empty(&mcast->qp_list)) {
@@ -338,15 +336,16 @@ int qib_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
}
spin_unlock_irq(&ibp->lock);
+ /* QP not attached */
+ if (!delp)
+ return -EINVAL;
+ /*
+ * Wait for any list walkers to finish before freeing the
+ * list element.
+ */
+ wait_event(mcast->wait, atomic_read(&mcast->refcount) <= 1);
+ qib_mcast_qp_free(delp);
- if (p) {
- /*
- * Wait for any list walkers to finish before freeing the
- * list element.
- */
- wait_event(mcast->wait, atomic_read(&mcast->refcount) <= 1);
- qib_mcast_qp_free(p);
- }
if (last) {
atomic_dec(&mcast->refcount);
wait_event(mcast->wait, !atomic_read(&mcast->refcount));
@@ -355,11 +354,7 @@ int qib_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
dev->n_mcast_grps_allocated--;
spin_unlock_irq(&dev->n_mcast_grps_lock);
}
-
- ret = 0;
-
-bail:
- return ret;
+ return 0;
}
int qib_mcast_tree_empty(struct qib_ibport *ibp)