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-rw-r--r--drivers/infiniband/core/verbs.c14
-rw-r--r--include/rdma/ib_verbs.h2
2 files changed, 13 insertions, 3 deletions
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 575b78045aaf..c5b94d647e1e 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1183,23 +1183,33 @@ EXPORT_SYMBOL(ib_dealloc_fmr);
int ib_attach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
{
+ int ret;
+
if (!qp->device->attach_mcast)
return -ENOSYS;
if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
return -EINVAL;
- return qp->device->attach_mcast(qp, gid, lid);
+ ret = qp->device->attach_mcast(qp, gid, lid);
+ if (!ret)
+ atomic_inc(&qp->usecnt);
+ return ret;
}
EXPORT_SYMBOL(ib_attach_mcast);
int ib_detach_mcast(struct ib_qp *qp, union ib_gid *gid, u16 lid)
{
+ int ret;
+
if (!qp->device->detach_mcast)
return -ENOSYS;
if (gid->raw[0] != 0xff || qp->qp_type != IB_QPT_UD)
return -EINVAL;
- return qp->device->detach_mcast(qp, gid, lid);
+ ret = qp->device->detach_mcast(qp, gid, lid);
+ if (!ret)
+ atomic_dec(&qp->usecnt);
+ return ret;
}
EXPORT_SYMBOL(ib_detach_mcast);
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index c3cca5a4dacd..c84d1016618e 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -964,7 +964,7 @@ struct ib_qp {
struct ib_srq *srq;
struct ib_xrcd *xrcd; /* XRC TGT QPs only */
struct list_head xrcd_list;
- atomic_t usecnt; /* count times opened */
+ atomic_t usecnt; /* count times opened, mcast attaches */
struct list_head open_list;
struct ib_qp *real_qp;
struct ib_uobject *uobject;