hotfix: rewrite allocate_CCEs, it didn't work properly.

The distinction common space/user space still requires some
careful examination.

openair2/LAYER2/MAC/eNB_scheduler_primitives.c

@@ -996,14 +996,13 @@ int allocate_CCEs(int module_idP,
   int nCCE_max = mac_xface->get_nCCE_max(module_idP,CC_idP,1,subframeP);
   int fCCE;
   int i,j;
-  int allocation_is_feasible = 1;
   DCI_ALLOC_t *dci_alloc;
   int nCCE=0;
 
   LOG_D(MAC,"Allocate CCEs subframe %d, test %d : (common %d,uspec %d)\n",subframeP,test_onlyP,DCI_pdu->Num_common_dci,DCI_pdu->Num_ue_spec_dci);
   DCI_pdu->num_pdcch_symbols=1;
 
-  while (allocation_is_feasible == 1) {
+try_again:
   init_CCE_table(module_idP,CC_idP);
   nCCE=0;
 
@@ -1017,35 +1016,24 @@ int allocate_CCEs(int module_idP,
 
     if (nCCE + (1<<dci_alloc->L) > nCCE_max) {
       if (DCI_pdu->num_pdcch_symbols == 3)
-	  allocation_is_feasible = 0;
-	else {
+        goto failed;
       DCI_pdu->num_pdcch_symbols++;
       nCCE_max = mac_xface->get_nCCE_max(module_idP,CC_idP,DCI_pdu->num_pdcch_symbols,subframeP);
+      goto try_again;
     }
-	break;
-      }
-      else { // number of CCEs left can potentially hold this allocation
-	if ((fCCE = get_nCCE_offset(CCE_table,
+
+    // number of CCEs left can potentially hold this allocation
+    fCCE = get_nCCE_offset(CCE_table,
                            1<<(dci_alloc->L),
                            nCCE_max,
                            (i<DCI_pdu->Num_common_dci) ? 1 : 0,
                            dci_alloc->rnti,
-				    subframeP))>=0) {// the allocation is feasible, rnti rule passes
-
-	  LOG_D(MAC,"Allocating at nCCE %d\n",fCCE);
-	  if (test_onlyP == 0) {
-	    nCCE += (1<<dci_alloc->L);
-	    dci_alloc->firstCCE=fCCE;
-	    LOG_D(MAC,"Allocate CCEs subframe %d, test %d\n",subframeP,test_onlyP);
-	  }
-	} // fCCE>=0
-	else {
+                           subframeP);
+    if (fCCE == -1) {
       if (DCI_pdu->num_pdcch_symbols == 3) {
-	    allocation_is_feasible = 0;
         LOG_I(MAC,"subframe %d: Dropping Allocation for RNTI %x\n",
               subframeP,dci_alloc->rnti);
         for (j=0;j<=i;j++){
-	     
           LOG_I(MAC,"DCI %d/%d (%d,%d) : rnti %x dci format %d, aggreg %d nCCE %d / %d (num_pdcch_symbols %d)\n",
                 i,DCI_pdu->Num_common_dci+DCI_pdu->Num_ue_spec_dci,
                 DCI_pdu->Num_common_dci,DCI_pdu->Num_ue_spec_dci,
@@ -1053,22 +1041,26 @@ int allocate_CCEs(int module_idP,
                 1<<DCI_pdu->dci_alloc[j].L,
                 nCCE,nCCE_max,DCI_pdu->num_pdcch_symbols);
         }
+        goto failed;
       }
-	  else {
       DCI_pdu->num_pdcch_symbols++;
       nCCE_max = mac_xface->get_nCCE_max(module_idP,CC_idP,DCI_pdu->num_pdcch_symbols,subframeP);
-	  }
-	  break;
+      goto try_again;
     } // fCCE==-1
-      } // nCCE <= nCCE_max
-    } // for i = 0 ... num_dcis  
-    if (allocation_is_feasible==1)
-      return (0);
-  } // allocation_is_feasible == 1
 
-  return(-1);
+    // the allocation is feasible, rnti rule passes
+    nCCE += (1<<dci_alloc->L);
+    LOG_D(MAC,"Allocating at nCCE %d\n",fCCE);
+    if (test_onlyP == 0) {
+      dci_alloc->firstCCE=fCCE;
+      LOG_D(MAC,"Allocate CCEs subframe %d, test %d\n",subframeP,test_onlyP);
+    }
+  } // for i = 0 ... num_dcis
 
+  return 0;
 
+failed:
+  return -1;
 }
 
 boolean_t CCE_allocation_infeasible(int module_idP,