From f6475223b12b3a38298976506edb042e13158798 Mon Sep 17 00:00:00 2001
From: Mike Marciniszyn <mike.marciniszyn@intel.com>
Date: Wed, 7 Dec 2016 19:34:25 -0800
Subject: [PATCH] IB/rdmavt: Add swqe mr deref helper

Add a helper to release mr references held by
an swqe.

Reviewed-by: Brian Welty <brian.welty@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
---
 include/rdma/rdmavt_qp.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/include/rdma/rdmavt_qp.h b/include/rdma/rdmavt_qp.h
index d78e99cf6c11..04facda681e0 100644
--- a/include/rdma/rdmavt_qp.h
+++ b/include/rdma/rdmavt_qp.h
@@ -485,6 +485,23 @@ static inline void rvt_put_qp(struct rvt_qp *qp)
 		wake_up(&qp->wait);
 }
 
+/**
+ * rvt_put_swqe - drop mr refs held by swqe
+ * @wqe - the send wqe
+ *
+ * This drops any mr references held by the swqe
+ */
+static inline void rvt_put_swqe(struct rvt_swqe *wqe)
+{
+	int i;
+
+	for (i = 0; i < wqe->wr.num_sge; i++) {
+		struct rvt_sge *sge = &wqe->sg_list[i];
+
+		rvt_put_mr(sge->mr);
+	}
+}
+
 /**
  * rvt_qp_wqe_reserve - reserve operation
  * @qp - the rvt qp