IB/ipath: strncpy() doesn't always NUL-terminate

strlcpy() will always null terminate the string.  node_desc is not
guaranteed to be NUL-terminated so just use memcpy().

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

drivers/infiniband/hw/ipath/ipath_file_ops.c

@@ -1616,7 +1616,7 @@ static int try_alloc_port(struct ipath_devdata *dd, int port,
 		pd->port_cnt = 1;
 		port_fp(fp) = pd;
 		pd->port_pid = get_pid(task_pid(current));
-		strncpy(pd->port_comm, current->comm, sizeof(pd->port_comm));
+		strlcpy(pd->port_comm, current->comm, sizeof(pd->port_comm));
 		ipath_stats.sps_ports++;
 		ret = 0;
 	} else

drivers/infiniband/hw/ipath/ipath_mad.c

@@ -60,7 +60,7 @@ static int recv_subn_get_nodedescription(struct ib_smp *smp,
 	if (smp->attr_mod)
 		smp->status |= IB_SMP_INVALID_FIELD;
 
-	strncpy(smp->data, ibdev->node_desc, sizeof(smp->data));
+	memcpy(smp->data, ibdev->node_desc, sizeof(smp->data));
 
 	return reply(smp);
 }