qcacld-2.0: Making sure there is no active entry during unload

This is prima to qcacld-2.0 propagation.

During unload of driver if there is any active entry point
from the app space, then there might be race condition in verifying
the state for cleanup in unload thread and access by the active
entry.

Making sure this race condition is avoided by updating the
load unload flag with rtnl lock acquired.

Change-Id: I385b8c646b50e8584fa588ebfa796c9413ffa46c
CRs-Fixed: 801561

1 files changed, 2 insertions, 0 deletions

diff --git a/CORE/HDD/src/wlan_hdd_main.c b/CORE/HDD/src/wlan_hdd_main.c
index defea6aad3f7..633e2efbdf4a 100755
--- a/CORE/HDD/src/wlan_hdd_main.c
+++ b/CORE/HDD/src/wlan_hdd_main.c
@@ -13605,8 +13605,10 @@ static void hdd_driver_exit(void)
          }
       }
 
+      rtnl_lock();
       pHddCtx->isUnloadInProgress = TRUE;
       vos_set_load_unload_in_progress(VOS_MODULE_ID_VOSS, TRUE);
+      rtnl_unlock();
    }
 
    vos_wait_for_work_thread_completion(__func__);