commit e362b453a08edfd7cd969c85579e7de5a5b61cac
author Vinay Krishna Eranna <c_veran@qti.qualcomm.com> Tue Sep 23 13:09:46 2014 +0530
committer Satyanarayana Dash <c_sadash@qti.qualcomm.com> Tue Oct 07 13:07:27 2014 +0530
tree aeae5bb20902e7b911e8a0160ccf3cc42e6c0284
parent 2633acefb8a96e2d8bd50016fa0b20f62ae7ec9b

wlan: Making sure there is no active entry during unload

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: I652ce47b102cbf11274df18d6c6a166773c2e624
CRs-Fixed: 721264

CORE/HDD/src/wlan_hdd_main.c

diff --git a/CORE/HDD/src/wlan_hdd_main.c b/CORE/HDD/src/wlan_hdd_main.c
index 566c60c..afcdb54 100644
--- a/CORE/HDD/src/wlan_hdd_main.c
+++ b/CORE/HDD/src/wlan_hdd_main.c
@@ -9600,8 +9600,10 @@
          }
        }
 
+      rtnl_lock();
       pHddCtx->isLoadUnloadInProgress = WLAN_HDD_UNLOAD_IN_PROGRESS;
       vos_set_load_unload_in_progress(VOS_MODULE_ID_VOSS, TRUE);
+      rtnl_unlock();
 
       /* Driver Need to send country code 00 in below condition
        * 1) If gCountryCodePriority is set to 1; and last country