qcacmn: cleanup scan queue in case of SSR & iff going down

When the SSR and interface down happen in parallel,
the driver rejects the interface down since the
recovery is in progress. Kernel ignores the -EAGAIN
request from the driver and as part of NET_DOWN notification
in cfg80211_netdown_notifer the kernel invokes the
___cfg80211_scan_done to free the request but doesn't not send
scan_result indication, since it expects the scan_done work to
get scheduled and then broadcast the request to upperlayer.

The scan done checks currently only if the interface is up replace
it with driver specific internal driver state.

Change-Id: I0e5ac319783b9c1a69e7e19674f76f20da1d1590
CRs-Fixed: 3202812

os_if/linux/scan/inc/wlan_cfg80211_scan.h

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2017-2021 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -443,6 +444,7 @@ void wlan_config_sched_scan_plans_to_wiphy(struct wiphy *wiphy,
  * @netdev: Net device
  * @req : Scan request
  * @aborted : true scan aborted false scan success
+ * @osif_priv: OS private structure
  *
  * This function notifies scan done to cfg80211
  *
@@ -450,7 +452,7 @@ void wlan_config_sched_scan_plans_to_wiphy(struct wiphy *wiphy,
  */
 void wlan_cfg80211_scan_done(struct net_device *netdev,
 			     struct cfg80211_scan_request *req,
-			     bool aborted);
+			     bool aborted, struct pdev_osif_priv *osif_priv);
 
 /**
  * convert_nl_scan_priority_to_internal() - Convert NL80211 based scan prioirty

os_if/linux/scan/src/wlan_cfg80211_scan.c

@@ -841,6 +841,7 @@ static QDF_STATUS wlan_scan_request_dequeue(
  * @netdev: Net device
  * @req : Scan request
  * @aborted : true scan aborted false scan success
+ * @osif_priv: OS private structure
  *
  * This function notifies scan done to cfg80211
  *
@@ -848,14 +849,23 @@ static QDF_STATUS wlan_scan_request_dequeue(
  */
 void wlan_cfg80211_scan_done(struct net_device *netdev,
 			     struct cfg80211_scan_request *req,
-			     bool aborted)
+			     bool aborted, struct pdev_osif_priv *osif_priv)
 {
 	struct cfg80211_scan_info info = {
 		.aborted = aborted
 	};
+	bool driver_internal_netdev_state;
 
-	if (netdev->flags & IFF_UP)
+	driver_internal_netdev_state = netdev->flags & IFF_UP;
+	if (osif_priv->osif_check_netdev_state)
+		driver_internal_netdev_state =
+			osif_priv->osif_check_netdev_state(netdev);
+
+	if (driver_internal_netdev_state)
 		cfg80211_scan_done(req, &info);
+	else
+		osif_debug("scan done callback has been dropped :%s",
+			   (netdev)->name);
 }
 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 14, 0))
 /**
@@ -863,6 +873,7 @@ void wlan_cfg80211_scan_done(struct net_device *netdev,
  * @netdev: Net device
  * @req : Scan request
  * @aborted : true scan aborted false scan success
+ * @osif_priv - OS private structure
  *
  * This function notifies scan done to cfg80211
  *
@@ -870,10 +881,19 @@ void wlan_cfg80211_scan_done(struct net_device *netdev,
  */
 void wlan_cfg80211_scan_done(struct net_device *netdev,
 			     struct cfg80211_scan_request *req,
-			     bool aborted)
+			     bool aborted, struct pdev_osif_priv *osif_priv)
 {
-	if (netdev->flags & IFF_UP)
+	bool driver_internal_net_state;
+
+	driver_internal_netdev_state = netdev->flags & IFF_UP;
+	if (osif_priv->osif_check_netdev_state)
+		driver_internal_net_state =
+			osif_priv->osif_check_netdev_state(netdev);
+
+	if (driver_internal_netdev_state)
 		cfg80211_scan_done(req, aborted);
+	else
+		osif_debug("scan request has been dropped :%s", (netdev)->name);
 }
 #endif
 
@@ -1082,6 +1102,7 @@ static void wlan_cfg80211_scan_done_callback(
 		return;
 
 	pdev = wlan_vdev_get_pdev(vdev);
+	osif_priv = wlan_pdev_get_ospriv(pdev);
 	status = wlan_scan_request_dequeue(
 			pdev, scan_id, &req, &source, &netdev,
 			&scan_start_timestamp);
@@ -1122,7 +1143,7 @@ static void wlan_cfg80211_scan_done_callback(
 	 * scan done event will be posted
 	 */
 	if (NL_SCAN == source)
-		wlan_cfg80211_scan_done(netdev, req, !success);
+		wlan_cfg80211_scan_done(netdev, req, !success, osif_priv);
 	else
 		wlan_vendor_scan_callback(req, !success);
 
@@ -1136,7 +1157,6 @@ static void wlan_cfg80211_scan_done_callback(
 		       util_scan_get_ev_reason_name(event->reason),
 		       event->reason, unique_bss_count);
 allow_suspend:
-	osif_priv = wlan_pdev_get_ospriv(pdev);
 	qdf_mutex_acquire(&osif_priv->osif_scan->scan_req_q_lock);
 	if (qdf_list_empty(&osif_priv->osif_scan->scan_req_q)) {
 		struct wlan_objmgr_psoc *psoc;
@@ -1341,7 +1361,7 @@ void wlan_cfg80211_cleanup_scan_queue(struct wlan_objmgr_pdev *pdev,
 		source = scan_req->source;
 		if (NL_SCAN == source)
 			wlan_cfg80211_scan_done(scan_req->dev, req,
-						aborted);
+						aborted, osif_priv);
 		else
 			wlan_vendor_scan_callback(req, aborted);
 

os_if/linux/wlan_osif_priv.h

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2016-2017,2020-2021 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -33,12 +34,14 @@ struct osif_tdls_vdev;
  * @legacy_osif_priv: legacy osif private handle
  * @scan_priv:        Scan related data used by cfg80211 scan
  * @nif:              pdev net device
+ * @osif_check_netdev_state: check driver internal netdev state
  */
 struct pdev_osif_priv {
 	struct wiphy *wiphy;
 	void *legacy_osif_priv;
 	struct osif_scan_pdev *osif_scan;
 	struct qdf_net_if *nif;
+	int (*osif_check_netdev_state)(struct net_device *netdev);
 };
 
 /**