bugfix: fix issue 285 - connect/disconnect multiple time

As reported by Emad Alizade:

    According to "Issue255 256 257 paging reesta release" that has been
    merged in develop version, we have a question: In rrc_eNB_free_UE()
    function only all ulsch related memory of user has been cleaned, but
    I think not only ulsch memory but also dlsch memory must be cleaned.
    I tested the latest develop version and with repetition UE attach-detach
    procedures we find that the dlsch memory has not been cleaned and after
    repeat this sequence (45 times) assertion with cause UE_id!=-1 (no free
    or exiting dlsch_context, dci_tools.c: fill_dci_and_dlsch() ) occurred
    and no UE will be attached to system.

The fixes in this commit are from Emad Alizade.

openair1/PHY/LTE_TRANSPORT/dlsch_coding.c

@@ -247,6 +247,7 @@ void clean_eNb_dlsch(LTE_eNB_DLSCH_t *dlsch)
     Mdlharq = dlsch->Mdlharq;
     dlsch->rnti = 0;
     dlsch->active = 0;
+    dlsch->harq_mask = 0;
 
     for (i=0; i<10; i++)
       dlsch->harq_ids[i] = Mdlharq;

openair1/PHY/LTE_TRANSPORT/ulsch_decoding.c

@@ -170,6 +170,7 @@ void clean_eNb_ulsch(LTE_eNB_ULSCH_t *ulsch)
   //ulsch = (LTE_eNB_ULSCH_t *)malloc16(sizeof(LTE_eNB_ULSCH_t));
   if (ulsch) {
     ulsch->rnti = 0;
+    ulsch->harq_mask = 0;
 
     for (i=0; i<8; i++) {
       if (ulsch->harq_processes[i]) {

openair2/LAYER2/MAC/eNB_scheduler.c

@@ -722,14 +722,18 @@ eNB_dlsch_ulsch_scheduler(module_id_t module_idP, frame_t frameP,
                 break;
               }
             }
-
              for (int ii=0; ii<NUMBER_OF_UE_MAX; ii++) {
-                 LTE_eNB_ULSCH_t *ulsch = NULL;
-                 ulsch = RC.eNB[module_idP][CC_id]->ulsch[ii];
+                 LTE_eNB_ULSCH_t *ulsch = RC.eNB[module_idP][CC_id]->ulsch[ii];
                  if((ulsch != NULL) && (ulsch->rnti == rnti)){
                      LOG_I(MAC, "clean_eNb_ulsch UE %x \n", rnti);
                      clean_eNb_ulsch(ulsch);
-                     break;
+                 }
+             }
+             for (int ii=0; ii<NUMBER_OF_UE_MAX; ii++) {
+                 LTE_eNB_DLSCH_t *dlsch = RC.eNB[module_idP][CC_id]->dlsch[ii][0];
+                 if((dlsch != NULL) && (dlsch->rnti == rnti)){
+                     LOG_I(MAC, "clean_eNb_dlsch UE %x \n", rnti);
+                     clean_eNb_dlsch(dlsch);
                  }
              }
 

openair2/RRC/LITE/rrc_eNB.c

@@ -809,6 +809,7 @@ rrc_eNB_free_UE(const module_id_t enb_mod_idP,const struct rrc_eNB_ue_context_s*
   rnti_t rnti = ue_context_pP->ue_context.rnti;
   int i, j , CC_id, pdu_number;
   LTE_eNB_ULSCH_t *ulsch = NULL;
+  LTE_eNB_DLSCH_t *dlsch = NULL;
   nfapi_ul_config_request_body_t *ul_req_tmp = NULL;
   PHY_VARS_eNB *eNB_PHY = NULL;
   eNB_MAC_INST *eNB_MAC = RC.mac[enb_mod_idP];
@@ -851,7 +852,13 @@ rrc_eNB_free_UE(const module_id_t enb_mod_idP,const struct rrc_eNB_ue_context_s*
         if((ulsch != NULL) && (ulsch->rnti == rnti)){
           LOG_I(RRC, "clean_eNb_ulsch UE %x \n", rnti);
           clean_eNb_ulsch(ulsch);
-          break;
+        }
+      }
+      for (i=0; i<NUMBER_OF_UE_MAX; i++) {
+        dlsch = eNB_PHY->dlsch[i][0];
+        if((dlsch != NULL) && (dlsch->rnti == rnti)){
+          LOG_I(RRC, "clean_eNb_dlsch UE %x \n", rnti);
+          clean_eNb_dlsch(dlsch);
         }
       }