wlan: mac: scan optimization to avoid P2P stale entry

This change addresses that driver ends up sending stale
P2P scan results to upper layer during back to back P2P connection.

Change-Id: Ia572ee781996c09903f064b77f40fe2c1ea3e6a4
CRs-Fixed: 771243

4 files changed, 39 insertions, 0 deletions

diff --git a/CORE/MAC/inc/aniGlobal.h b/CORE/MAC/inc/aniGlobal.h
index cc79bc36282d..c586265ef9e8 100644
--- a/CORE/MAC/inc/aniGlobal.h
+++ b/CORE/MAC/inc/aniGlobal.h
@@ -846,6 +846,8 @@ tLimMlmOemDataRsp       *gpLimMlmOemDataRsp;
     tANI_U8 fOffloadScanPending; /*Flag to track offload scan */
     tANI_U8 fOffloadScanP2PSearch; /*Flag to track the p2p search */
     tANI_U8 fOffloadScanP2PListen; /*Flag to track the p2p listen */
+    /*Filter out P2P result if not P2P scan/listen */
+    tANI_U8 offload_scan_filter_p2p_result;
     tANI_U8 probeCounter;
     tANI_U8 maxProbe;
 } tAniSirLim, *tpAniSirLim;
diff --git a/CORE/MAC/src/pe/lim/limProcessMlmRspMessages.c b/CORE/MAC/src/pe/lim/limProcessMlmRspMessages.c
index 33a209d2f91a..e7900565b787 100644
--- a/CORE/MAC/src/pe/lim/limProcessMlmRspMessages.c
+++ b/CORE/MAC/src/pe/lim/limProcessMlmRspMessages.c
@@ -4888,6 +4888,19 @@ void limProcessRxScanEvent(tpAniSirGlobal pMac, void *buf)
             break;
         case SCAN_EVENT_START_FAILED:
         case SCAN_EVENT_COMPLETED:
+            limLog(pMac, LOG1, FL("pMac->fScanOffload %d, pMac->lim.fOffloadScanPending %d, pMac->lim.fOffloadScanP2PSearch %d, pMac->lim.fOffloadScanP2PListen %d"),
+                   pMac->fScanOffload, pMac->lim.fOffloadScanPending,
+                   pMac->lim.fOffloadScanP2PSearch,
+                   pMac->lim.fOffloadScanP2PListen);
+
+            if ((SCAN_EVENT_COMPLETED == pScanEvent->event) &&
+                 !(pMac->fScanOffload && pMac->lim.fOffloadScanPending &&
+                  (pMac->lim.fOffloadScanP2PSearch ||
+                   pMac->lim.fOffloadScanP2PListen)))
+            {
+                pMac->lim.offload_scan_filter_p2p_result = 1;
+            }
+
             pMac->lim.fOffloadScanPending = 0;
             pMac->lim.fOffloadScanP2PSearch = 0;
             pMac->lim.fOffloadScanP2PListen = 0;
@@ -4903,6 +4916,7 @@ void limProcessRxScanEvent(tpAniSirGlobal pMac, void *buf)
             {
                 limSendScanOffloadComplete(pMac, pScanEvent);
             }
+            pMac->lim.offload_scan_filter_p2p_result = 0;
             break;
         case SCAN_EVENT_FOREIGN_CHANNEL:
             if (P2P_SCAN_TYPE_LISTEN == pScanEvent->p2pScanType)
diff --git a/CORE/MAC/src/pe/lim/limProcessSmeReqMessages.c b/CORE/MAC/src/pe/lim/limProcessSmeReqMessages.c
index 9f45f99d5a9f..1f6c40489c7e 100644
--- a/CORE/MAC/src/pe/lim/limProcessSmeReqMessages.c
+++ b/CORE/MAC/src/pe/lim/limProcessSmeReqMessages.c
@@ -1129,6 +1129,7 @@ static eHalStatus limSendHalStartScanOffloadReq(tpAniSirGlobal pMac,
 
     pMac->lim.fOffloadScanPending = 0;
     pMac->lim.fOffloadScanP2PSearch = 0;
+    pMac->lim.offload_scan_filter_p2p_result = 0;
 
     /* The tSirScanOffloadReq will reserve the space for first channel,
        so allocate the memory for (numChannels - 1) and uIEFieldLen */
diff --git a/CORE/MAC/src/pe/lim/limSendSmeRspMessages.c b/CORE/MAC/src/pe/lim/limSendSmeRspMessages.c
index b2dbba39f890..86fdb9086082 100644
--- a/CORE/MAC/src/pe/lim/limSendSmeRspMessages.c
+++ b/CORE/MAC/src/pe/lim/limSendSmeRspMessages.c
@@ -782,6 +782,8 @@ limSendSmeScanRsp(tpAniSirGlobal pMac, tANI_U16 length,
     tANI_U16              i, bssCount;
     tANI_U8               *pbBuf;
     tSirBssDescription    *pDesc;
+    tANI_U8 *pssidstr;
+    tSirMacSSid *pssid;
 
     limLog(pMac, LOG1,
        FL("Sending message SME_SCAN_RSP with length=%d reasonCode %s"),
@@ -807,13 +809,33 @@ limSendSmeScanRsp(tpAniSirGlobal pMac, tANI_U16 length,
 
         return;
     }
+
     for (i = 0; i < LIM_MAX_NUM_OF_SCAN_RESULTS; i++)
     {
         //when ptemp is not NULL it is a left over
         ptemp = pMac->lim.gLimCachedScanHashTable[i];
+        pSirSmeScanRsp->sessionId   = smesessionId;
+        pSirSmeScanRsp->transcationId = smetranscationId;
+
         while(ptemp)
         {
             pbBuf = ((tANI_U8 *)pSirSmeScanRsp) + msgLen;
+
+            if (pMac->lim.offload_scan_filter_p2p_result)
+            {
+                pssid =
+                (tSirMacSSid *)((tANI_U8 *)&ptemp->bssDescription.ieFields + 1);
+                pssidstr = pssid->ssId;
+                if (vos_mem_compare(pssidstr, P2P_WILDCARD_SSID,
+                    P2P_WILDCARD_SSID_LEN))
+                {
+                    limLog(pMac, LOG1,
+                    FL("Skipping p2p entries for eWNI_SME_SCAN_RSP"));
+                    ptemp = ptemp->next;
+                    continue;
+                }
+            }
+
             if(0 == bssCount)
             {
                 msgLen = sizeof(tSirSmeScanRsp) -