IB/mad: pass ib_mad_send_buf explicitly to the recv_handler

Stop abusing wr_id and just pass the parameter explicitly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hal Rosenstock <hal@mellanox.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/core/cm.c

@@ -3503,6 +3503,7 @@ int ib_cm_notify(struct ib_cm_id *cm_id, enum ib_event_type event)
 EXPORT_SYMBOL(ib_cm_notify);
 
 static void cm_recv_handler(struct ib_mad_agent *mad_agent,
+			    struct ib_mad_send_buf *send_buf,
 			    struct ib_mad_recv_wc *mad_recv_wc)
 {
 	struct cm_port *port = mad_agent->context;

drivers/infiniband/core/mad.c

@@ -693,7 +693,7 @@ static void snoop_recv(struct ib_mad_qp_info *qp_info,
 
 		atomic_inc(&mad_snoop_priv->refcount);
 		spin_unlock_irqrestore(&qp_info->snoop_lock, flags);
-		mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent,
+		mad_snoop_priv->agent.recv_handler(&mad_snoop_priv->agent, NULL,
 						   mad_recv_wc);
 		deref_snoop_agent(mad_snoop_priv);
 		spin_lock_irqsave(&qp_info->snoop_lock, flags);
@@ -1994,9 +1994,9 @@ static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv,
 				/* user rmpp is in effect
 				 * and this is an active RMPP MAD
 				 */
-				mad_recv_wc->wc->wr_id = 0;
-				mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
-								   mad_recv_wc);
+				mad_agent_priv->agent.recv_handler(
+						&mad_agent_priv->agent, NULL,
+						mad_recv_wc);
 				atomic_dec(&mad_agent_priv->refcount);
 			} else {
 				/* not user rmpp, revert to normal behavior and
@@ -2010,9 +2010,10 @@ static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv,
 			spin_unlock_irqrestore(&mad_agent_priv->lock, flags);
 
 			/* Defined behavior is to complete response before request */
-			mad_recv_wc->wc->wr_id = (unsigned long) &mad_send_wr->send_buf;
-			mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
-							   mad_recv_wc);
+			mad_agent_priv->agent.recv_handler(
+					&mad_agent_priv->agent,
+					&mad_send_wr->send_buf,
+					mad_recv_wc);
 			atomic_dec(&mad_agent_priv->refcount);
 
 			mad_send_wc.status = IB_WC_SUCCESS;
@@ -2021,7 +2022,7 @@ static void ib_mad_complete_recv(struct ib_mad_agent_private *mad_agent_priv,
 			ib_mad_complete_send_wr(mad_send_wr, &mad_send_wc);
 		}
 	} else {
-		mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent,
+		mad_agent_priv->agent.recv_handler(&mad_agent_priv->agent, NULL,
 						   mad_recv_wc);
 		deref_mad_agent(mad_agent_priv);
 	}
@@ -2762,6 +2763,7 @@ static void local_completions(struct work_struct *work)
 					   IB_MAD_SNOOP_RECVS);
 			recv_mad_agent->agent.recv_handler(
 						&recv_mad_agent->agent,
+						&local->mad_send_wr->send_buf,
 						&local->mad_priv->header.recv_wc);
 			spin_lock_irqsave(&recv_mad_agent->lock, flags);
 			atomic_dec(&recv_mad_agent->refcount);

drivers/infiniband/core/sa_query.c

@@ -1669,14 +1669,15 @@ static void send_handler(struct ib_mad_agent *agent,
 }
 
 static void recv_handler(struct ib_mad_agent *mad_agent,
+			 struct ib_mad_send_buf *send_buf,
 			 struct ib_mad_recv_wc *mad_recv_wc)
 {
 	struct ib_sa_query *query;
-	struct ib_mad_send_buf *mad_buf;
 
-	mad_buf = (void *) (unsigned long) mad_recv_wc->wc->wr_id;
-	query = mad_buf->context[0];
+	if (!send_buf)
+		return;
 
+	query = send_buf->context[0];
 	if (query->callback) {
 		if (mad_recv_wc->wc->status == IB_WC_SUCCESS)
 			query->callback(query,

drivers/infiniband/core/user_mad.c

@@ -210,6 +210,7 @@ static void send_handler(struct ib_mad_agent *agent,
 }
 
 static void recv_handler(struct ib_mad_agent *agent,
+			 struct ib_mad_send_buf *send_buf,
 			 struct ib_mad_recv_wc *mad_recv_wc)
 {
 	struct ib_umad_file *file = agent->context;

drivers/infiniband/ulp/srpt/ib_srpt.c

@@ -455,6 +455,7 @@ static void srpt_mad_send_handler(struct ib_mad_agent *mad_agent,
  * srpt_mad_recv_handler() - MAD reception callback function.
  */
 static void srpt_mad_recv_handler(struct ib_mad_agent *mad_agent,
+				  struct ib_mad_send_buf *send_buf,
 				  struct ib_mad_recv_wc *mad_wc)
 {
 	struct srpt_port *sport = (struct srpt_port *)mad_agent->context;

include/rdma/ib_mad.h

@@ -438,6 +438,7 @@ typedef void (*ib_mad_snoop_handler)(struct ib_mad_agent *mad_agent,
 /**
  * ib_mad_recv_handler - callback handler for a received MAD.
  * @mad_agent: MAD agent requesting the received MAD.
+ * @send_buf: Send buffer if found, else NULL
  * @mad_recv_wc: Received work completion information on the received MAD.
  *
  * MADs received in response to a send request operation will be handed to
@@ -447,6 +448,7 @@ typedef void (*ib_mad_snoop_handler)(struct ib_mad_agent *mad_agent,
  * modify the data referenced by @mad_recv_wc.
  */
 typedef void (*ib_mad_recv_handler)(struct ib_mad_agent *mad_agent,
+				    struct ib_mad_send_buf *send_buf,
 				    struct ib_mad_recv_wc *mad_recv_wc);
 
 /**