net/smc: use smc_curs_copy() for SMC-D

SMC already provides a wrapper for atomic64 calls to be
architecture independent. Use this wrapper for SMC-D as well.
Reported-by: NJens Remus <jremus@linux.ibm.com>
Signed-off-by: NUrsula Braun <ubraun@linux.ibm.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/smc/smc_cdc.h

@@ -245,17 +245,18 @@ static inline void smcr_cdc_msg_to_host(struct smc_host_cdc_msg *local,
 }
 
 static inline void smcd_cdc_msg_to_host(struct smc_host_cdc_msg *local,
-					struct smcd_cdc_msg *peer)
+					struct smcd_cdc_msg *peer,
+					struct smc_connection *conn)
 {
 	union smc_host_cursor temp;
 
 	temp.wrap = peer->prod.wrap;
 	temp.count = peer->prod.count;
-	atomic64_set(&local->prod.acurs, atomic64_read(&temp.acurs));
+	smc_curs_copy(&local->prod, &temp, conn);
 
 	temp.wrap = peer->cons.wrap;
 	temp.count = peer->cons.count;
-	atomic64_set(&local->cons.acurs, atomic64_read(&temp.acurs));
+	smc_curs_copy(&local->cons, &temp, conn);
 	local->prod_flags = peer->cons.prod_flags;
 	local->conn_state_flags = peer->cons.conn_state_flags;
 }
@@ -265,7 +266,7 @@ static inline void smc_cdc_msg_to_host(struct smc_host_cdc_msg *local,
 				       struct smc_connection *conn)
 {
 	if (conn->lgr->is_smcd)
-		smcd_cdc_msg_to_host(local, (struct smcd_cdc_msg *)peer);
+		smcd_cdc_msg_to_host(local, (struct smcd_cdc_msg *)peer, conn);
 	else
 		smcr_cdc_msg_to_host(local, peer, conn);
 }