diff --git a/net/sunrpc/xprtrdma/fmr_ops.c b/net/sunrpc/xprtrdma/fmr_ops.c
index 5dd77dac094c56c37002712a792b88b43b9d717f..52f9ad5fe19bb1e06c06c482a0afc80a146701e4 100644
--- a/net/sunrpc/xprtrdma/fmr_ops.c
+++ b/net/sunrpc/xprtrdma/fmr_ops.c
@@ -65,6 +65,7 @@ fmr_op_init(struct rpcrdma_xprt *r_xprt)
 	struct rpcrdma_mw *r;
 	int i, rc;
 
+	spin_lock_init(&buf->rb_mwlock);
 	INIT_LIST_HEAD(&buf->rb_mws);
 	INIT_LIST_HEAD(&buf->rb_all);
 
diff --git a/net/sunrpc/xprtrdma/frwr_ops.c b/net/sunrpc/xprtrdma/frwr_ops.c
index 862279267fb84676d34a7a50db0fa94622c4ceba..18b7305d249fbc676a782ced87b6258e40f3bd70 100644
--- a/net/sunrpc/xprtrdma/frwr_ops.c
+++ b/net/sunrpc/xprtrdma/frwr_ops.c
@@ -266,6 +266,7 @@ frwr_op_init(struct rpcrdma_xprt *r_xprt)
 	struct ib_pd *pd = r_xprt->rx_ia.ri_pd;
 	int i;
 
+	spin_lock_init(&buf->rb_mwlock);
 	INIT_LIST_HEAD(&buf->rb_mws);
 	INIT_LIST_HEAD(&buf->rb_all);
 
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index cc1a5260997482ccc786fb979285fbd5659fc3aa..234083560d0e2c5817d47775c17eceebdef23117 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -1173,15 +1173,14 @@ rpcrdma_get_mw(struct rpcrdma_xprt *r_xprt)
 {
 	struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
 	struct rpcrdma_mw *mw = NULL;
-	unsigned long flags;
 
-	spin_lock_irqsave(&buf->rb_lock, flags);
+	spin_lock(&buf->rb_mwlock);
 	if (!list_empty(&buf->rb_mws)) {
 		mw = list_first_entry(&buf->rb_mws,
 				      struct rpcrdma_mw, mw_list);
 		list_del_init(&mw->mw_list);
 	}
-	spin_unlock_irqrestore(&buf->rb_lock, flags);
+	spin_unlock(&buf->rb_mwlock);
 
 	if (!mw)
 		pr_err("RPC:       %s: no MWs available\n", __func__);
@@ -1192,11 +1191,10 @@ void
 rpcrdma_put_mw(struct rpcrdma_xprt *r_xprt, struct rpcrdma_mw *mw)
 {
 	struct rpcrdma_buffer *buf = &r_xprt->rx_buf;
-	unsigned long flags;
 
-	spin_lock_irqsave(&buf->rb_lock, flags);
+	spin_lock(&buf->rb_mwlock);
 	list_add_tail(&mw->mw_list, &buf->rb_mws);
-	spin_unlock_irqrestore(&buf->rb_lock, flags);
+	spin_unlock(&buf->rb_mwlock);
 }
 
 static void
diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index 3ecee38bf1a020b473cb11ac66f40667f565458c..df92884400c48338e47f8cf484f069b627c67c7b 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -282,15 +282,17 @@ rpcr_to_rdmar(struct rpc_rqst *rqst)
  * One of these is associated with a transport instance
  */
 struct rpcrdma_buffer {
-	spinlock_t	rb_lock;	/* protects indexes */
-	u32		rb_max_requests;/* client max requests */
-	struct list_head rb_mws;	/* optional memory windows/fmrs/frmrs */
-	struct list_head rb_all;
-	int		rb_send_index;
+	spinlock_t		rb_mwlock;	/* protect rb_mws list */
+	struct list_head	rb_mws;
+	struct list_head	rb_all;
+	char			*rb_pool;
+
+	spinlock_t		rb_lock;	/* protect buf arrays */
+	u32			rb_max_requests;
+	int			rb_send_index;
+	int			rb_recv_index;
 	struct rpcrdma_req	**rb_send_bufs;
-	int		rb_recv_index;
 	struct rpcrdma_rep	**rb_recv_bufs;
-	char		*rb_pool;
 };
 #define rdmab_to_ia(b) (&container_of((b), struct rpcrdma_xprt, rx_buf)->rx_ia)