Merge branch 'dreibh/device-load-fix-develop-branch' into 'develop'

Fix for Issue #494: check and handle return value of openair0_device_load()  (develop branch)

See merge request oai/openairinterface5g!780

targets/RT/USER/lte-ru.c

@@ -2342,11 +2342,15 @@ void init_RU_proc(RU_t *ru) {
     init_frame_parms(ru->frame_parms,1);
     ru->frame_parms->nb_antennas_rx = ru->nb_rx;
     phy_init_RU(ru);
-    openair0_device_load(&ru->rfdevice,&ru->openair0_cfg);
+    ret = openair0_device_load(&ru->rfdevice,&ru->openair0_cfg);
+    if (ret < 0) {
+       LOG_I(PHY,"Exiting, cannot load device. Make sure that your SDR board is connected!\n");
+       exit(1);
+    }
 
     if (setup_RU_buffers(ru)!=0) {
-      printf("Exiting, cannot initialize RU Buffers\n");
-      exit(-1);
+      LOG_I(PHY,"Exiting, cannot initialize RU Buffers\n");
+      exit(1);
     }
   }