qcacld-3.0: Revert "clear pmkid cache when ap off"

This change removes the "delete pmksa on BMISS" logic in commit
I5d8ec9e9d4f8a44178b113d370799fe2bc0373fb.
Will handle the issue in new commit by OUI checking of AP.

Change-Id: I871999f8c473afdc75b774210044fc059fcd07b0
CRs-Fixed: 3021068

components/umac/mlme/connection_mgr/core/src/wlan_cm_vdev_disconnect.c

@@ -194,67 +194,6 @@ static inline void cm_disconnect_diag_event(struct wlan_objmgr_vdev *vdev,
 {}
 #endif
 
-/**
- * cm_clear_pmkid_on_ap_off() - clear pmkid cache when ap off
- * @psoc: psoc ptr
- * @pdev: pdev ptr
- * @vdev: vdev ptr
- * @req: disconnect req
- *
- * In AP side power off/on case, AP security has been cleanup.
- * The STA side might still cache PMK ID in driver and it will always use
- * PMK cache to connect to AP and get continuously connect failure in SAE
- * security. This function is to detect AP off based on FW reported BMISS
- * event. Meanwhile judge FW reported last RSSI > roaming Low rssi
- * and not less than 20db of host cached RSSI to avoid some false
- * alarm such as normal DUT roll in/out roaming.
- *
- * Return: void
- */
-static void cm_clear_pmkid_on_ap_off(struct wlan_objmgr_psoc *psoc,
-				     struct wlan_objmgr_pdev *pdev,
-				     struct wlan_objmgr_vdev *vdev,
-				     struct wlan_cm_disconnect_req *req)
-{
-	int8_t cache_rssi = 0;
-	int32_t bmiss_rssi;
-	uint8_t lookup_threshold = 0;
-	struct wlan_crypto_pmksa *pmksa;
-	int32_t akm;
-	struct cm_roam_values_copy temp;
-
-	if (req->reason_code != REASON_BEACON_MISSED)
-		return;
-
-	akm = wlan_crypto_get_param(vdev, WLAN_CRYPTO_PARAM_KEY_MGMT);
-	if (!QDF_HAS_PARAM(akm, WLAN_CRYPTO_KEY_MGMT_SAE))
-		return;
-
-	cm_get_rssi_snr_by_bssid(pdev, &req->bssid, &cache_rssi, NULL);
-	wlan_cm_roam_cfg_get_value(psoc, req->vdev_id,
-				   NEIGHBOUR_LOOKUP_THRESHOLD, &temp);
-	lookup_threshold = temp.uint_value;
-
-	wlan_cm_roam_cfg_get_value(psoc, req->vdev_id,
-				   LOST_LINK_RSSI, &temp);
-	bmiss_rssi = temp.int_value;
-
-	if (!bmiss_rssi || !lookup_threshold || !cache_rssi)
-		return;
-	mlme_nofl_debug("sta bmiss on rssi %d scan rssi %d th %d", bmiss_rssi,
-			cache_rssi, lookup_threshold);
-	if (bmiss_rssi > (lookup_threshold * (-1))) {
-		if (bmiss_rssi + AP_OFF_RSSI_OFFSET > cache_rssi) {
-			pmksa = qdf_mem_malloc(sizeof(*pmksa));
-			if (!pmksa)
-				return;
-			qdf_copy_macaddr(&pmksa->bssid, &req->bssid);
-			wlan_crypto_set_del_pmksa(vdev, pmksa, false);
-			qdf_mem_free(pmksa);
-		}
-	}
-}
-
 QDF_STATUS
 cm_disconnect_complete_ind(struct wlan_objmgr_vdev *vdev,
 			   struct wlan_cm_discon_rsp *rsp)
@@ -284,7 +223,6 @@ cm_disconnect_complete_ind(struct wlan_objmgr_vdev *vdev,
 			 CM_PREFIX_REF(vdev_id, rsp->req.cm_id));
 		return QDF_STATUS_E_INVAL;
 	}
-	cm_clear_pmkid_on_ap_off(psoc, pdev, vdev, &rsp->req.req);
 	cm_disconnect_diag_event(vdev, rsp);
 	wlan_tdls_notify_sta_disconnect(vdev_id, false, false, vdev);
 	policy_mgr_decr_session_set_pcl(psoc, op_mode, vdev_id);