commit f7418d7a1a773181c0237c46b1689244c39613d0
author Mahesh A Saptasagar <c_msapta@qti.qualcomm.com> Mon Jun 02 14:48:54 2014 +0530
committer Kiet Lam <c_kietl@qca.qualcomm.com> Fri Jun 06 16:13:21 2014 -0700
tree ed6b757186572f04e699ae01f421668f12e1914c
parent 57019ef9f3e22044ff4f11b7fcbef62512b5cf2c

wlan: Protect add del and flush pmksa functions from SSR

Protect add del and flush pmksa cfg80211 functions from
accessing deallocated/unitialized data structures while
SSR is in progress.

Change-Id: I2d0ffc38100ef92f4b41451ede42caa788d386f1
CRs-Fixed: 673994

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 9f98e91..1a44de5 100644
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
@@ -9578,7 +9578,7 @@
 
 #ifdef FEATURE_WLAN_LFR
 
-static int wlan_hdd_cfg80211_set_pmksa(struct wiphy *wiphy, struct net_device *dev,
+static int __wlan_hdd_cfg80211_set_pmksa(struct wiphy *wiphy, struct net_device *dev,
             struct cfg80211_pmksa *pmksa)
 {
     tANI_U32 j=0;
@@ -9671,9 +9671,20 @@
     return 0;
 }
 
+static int wlan_hdd_cfg80211_set_pmksa(struct wiphy *wiphy, struct net_device *dev,
+            struct cfg80211_pmksa *pmksa)
+{
+   int ret;
+
+   vos_ssr_protect(__func__);
+   ret = __wlan_hdd_cfg80211_set_pmksa(wiphy, dev, pmksa);
+   vos_ssr_unprotect(__func__);
+
+   return ret;
+}
 
 
-static int wlan_hdd_cfg80211_del_pmksa(struct wiphy *wiphy, struct net_device *dev,
+static int __wlan_hdd_cfg80211_del_pmksa(struct wiphy *wiphy, struct net_device *dev,
              struct cfg80211_pmksa *pmksa)
 {
     tANI_U32 j=0;
@@ -9774,8 +9785,20 @@
 }
 
 
+static int wlan_hdd_cfg80211_del_pmksa(struct wiphy *wiphy, struct net_device *dev,
+             struct cfg80211_pmksa *pmksa)
+{
+    int ret;
 
-static int wlan_hdd_cfg80211_flush_pmksa(struct wiphy *wiphy, struct net_device *dev)
+    vos_ssr_protect(__func__);
+    ret = __wlan_hdd_cfg80211_del_pmksa(wiphy, dev, pmksa);
+    vos_ssr_unprotect(__func__);
+
+    return ret;
+
+}
+
+static int __wlan_hdd_cfg80211_flush_pmksa(struct wiphy *wiphy, struct net_device *dev)
 {
     tANI_U32 j=0;
     hdd_adapter_t *pAdapter = WLAN_HDD_GET_PRIV_PTR(dev);
@@ -9836,6 +9859,17 @@
     pHddStaCtx->PMKIDCacheIndex = 0;
     return status;
 }
+
+static int wlan_hdd_cfg80211_flush_pmksa(struct wiphy *wiphy, struct net_device *dev)
+{
+    int ret;
+
+    vos_ssr_protect(__func__);
+    ret = __wlan_hdd_cfg80211_flush_pmksa(wiphy, dev);
+    vos_ssr_unprotect(__func__);
+
+    return ret;
+}
 #endif
 
 #if defined(WLAN_FEATURE_VOWIFI_11R) && defined(KERNEL_SUPPORT_11R_CFG80211)