commit 37f213148670ce10d1985c7d41c457a6ef3a9cd7
author c_hpothu <c_hpothu@qti.qualcomm.com> Wed Apr 09 21:49:54 2014 +0530
committer Kiet Lam <c_kietl@qca.qualcomm.com> Fri Apr 11 12:42:28 2014 -0700
tree 7ed57d3c8c222ef7507058d69c19e3d79cb06850
parent e8f6834f3f5949c0d45fe4d84003a3d88714fb25

wlan: Allow single PNO scan at a time.

Its possible that, PNO scan is enabled either through wext or
through supplicant.
Changes have been made to allow only one PNO scan at a given time
by adding new variable, isPnoEnable.

Change-Id: Ifee337d5bb6175acdd5f6997942125e5306e89e0
CRs-Fixed: 622466

CORE/HDD/src/wlan_hdd_cfg80211.c

diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
index 8d8c299..3f3b3a9 100644
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
@@ -8396,11 +8396,20 @@
         return -EBUSY;
     }
 
+    if (TRUE == pHddCtx->isPnoEnable)
+    {
+        VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_WARN,
+                  FL("already PNO is enabled"));
+       return -EBUSY;
+    }
+    pHddCtx->isPnoEnable = TRUE;
+
     pPnoRequest = (tpSirPNOScanReq) vos_mem_malloc(sizeof (tSirPNOScanReq));
     if (NULL == pPnoRequest)
     {
         VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_FATAL,
                   "%s: vos_mem_malloc failed", __func__);
+        pHddCtx->isPnoEnable = FALSE;
         return -ENOMEM;
     }
 
@@ -8570,11 +8579,13 @@
     }
 
     ret = pAdapter->pno_req_status;
+    return ret;
 
 error:
     VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,
               FL("PNO scanRequest offloaded ret = %d"), ret);
     vos_mem_free(pPnoRequest);
+    pHddCtx->isPnoEnable = FALSE;
     return ret;
 }
 
@@ -8663,6 +8674,7 @@
         ret = -EINVAL;
         goto error;
     }
+    pHddCtx->isPnoEnable = FALSE;
 
 error:
     VOS_TRACE( VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_INFO,