qcacld-3.0: Flush inet notifier work before set ps

User can modify power save value which will be sent to FW.
IPv4/IPv6 notifier work will also checks this user configured
power save to send set ps request to FW, a possibility of
race condition exists when both user request and inet notifier
work are running at the same time.

Flush the inet notifier work to ensure the set PS calls are
serialized.

Change-Id: Ib7def61c961835682a6f72d6fb4bd97bd7ffff0f
CRs-Fixed: 3310057

core/hdd/inc/wlan_hdd_main.h

@@ -2906,6 +2906,19 @@ static inline bool hdd_roaming_supported(struct hdd_context *hdd_ctx)
 	return val;
 }
 
+#ifdef WLAN_NS_OFFLOAD
+static inline void
+hdd_adapter_flush_ipv6_notifier_work(struct hdd_adapter *adapter)
+{
+	flush_work(&adapter->ipv6_notifier_work);
+}
+#else
+static inline void
+hdd_adapter_flush_ipv6_notifier_work(struct hdd_adapter *adapter)
+{
+}
+#endif
+
 #ifdef CFG80211_SCAN_RANDOM_MAC_ADDR
 static inline bool hdd_scan_random_mac_addr_supported(void)
 {

core/hdd/src/wlan_hdd_power.c

@@ -2959,6 +2959,13 @@ static int __wlan_hdd_cfg80211_set_power_mgmt(struct wiphy *wiphy,
 
 	hdd_objmgr_put_vdev_by_user(vdev, WLAN_OSIF_POWER_ID);
 
+	/* Flush any scheduled inet change notifier work
+	 * This is to make sure set power save request
+	 * sent to FW are serialized to avoid race condition
+	 */
+	flush_work(&adapter->ipv4_notifier_work);
+	hdd_adapter_flush_ipv6_notifier_work(adapter);
+
 	if (is_mlo_vdev) {
 		status = wlan_hdd_set_mlo_ps(hdd_ctx->psoc, adapter,
 					     allow_power_save, timeout);