qcacld-3.0: Flush the blacklist BSSIDs in FW

Currently the expectation from the BLM is to flush
all the BSSIDs which are present in the blacklist
when the user does an explicit on-off, which is
meeting the expectation, but the FW does not flush
this info which leads to async between the two.

Fix is to send 0 blacklist BSSID to FW during
Wifi-off so that it also flushes the list.

Change-Id: I7a0629fefb12deaeec0b5eeea06169272621bf82
CRs-Fixed: 2647018

components/blacklist_mgr/core/inc/wlan_blm_core.h

@@ -182,6 +182,22 @@ QDF_STATUS
 blm_add_bssid_to_reject_list(struct wlan_objmgr_pdev *pdev,
 			     struct reject_ap_info *ap_info);
 
+/**
+ * blm_send_reject_ap_list_to_fw() - Send the blacklist BSSIDs to FW
+ * @pdev: Pdev object
+ * @reject_db_list: List of blacklist BSSIDs
+ * @cfg: Blacklist manager cfg
+ *
+ * This API will send the blacklist BSSIDs to FW for avoiding or blacklisting
+ * in roaming scenarios.
+ *
+ * Return: None
+ */
+void
+blm_send_reject_ap_list_to_fw(struct wlan_objmgr_pdev *pdev,
+			      qdf_list_t *reject_db_list,
+			      struct blm_config *cfg);
+
 /**
  * blm_add_userspace_black_list() - Clear already existing userspace BSSID, and
  * add the new ones to blacklist manager.

components/blacklist_mgr/core/src/wlan_blm_core.c

@@ -659,7 +659,7 @@ static void blm_fill_reject_list(qdf_list_t *reject_db_list,
 	}
 }
 
-static void
+void
 blm_send_reject_ap_list_to_fw(struct wlan_objmgr_pdev *pdev,
 			      qdf_list_t *reject_db_list,
 			      struct blm_config *cfg)
@@ -695,12 +695,6 @@ blm_send_reject_ap_list_to_fw(struct wlan_objmgr_pdev *pdev,
 			     DRIVER_AVOID_TYPE,
 			     PDEV_MAX_NUM_BSSID_DISALLOW_LIST, cfg);
 
-	if (!reject_params.num_of_reject_bssid) {
-		blm_debug("no candidate present in reject ap list.");
-		qdf_mem_free(reject_params.bssid_list);
-		return;
-	}
-
 	status = tgt_blm_send_reject_list_to_fw(pdev, &reject_params);
 
 	if (QDF_IS_STATUS_ERROR(status))

components/blacklist_mgr/dispatcher/src/wlan_blm_ucfg_api.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2019-2020 The Linux Foundation. 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
@@ -144,6 +144,9 @@ void
 ucfg_blm_wifi_off(struct wlan_objmgr_pdev *pdev)
 {
 	struct blm_pdev_priv_obj *blm_ctx;
+	struct blm_psoc_priv_obj *blm_psoc_obj;
+	struct blm_config *cfg;
+	QDF_STATUS status;
 
 	if (!pdev) {
 		blm_err("pdev is NULL");
@@ -151,10 +154,22 @@ ucfg_blm_wifi_off(struct wlan_objmgr_pdev *pdev)
 	}
 
 	blm_ctx = blm_get_pdev_obj(pdev);
-	if (!blm_ctx) {
-		blm_err("blm_ctx is NULL");
+	blm_psoc_obj = blm_get_psoc_obj(wlan_pdev_get_psoc(pdev));
+
+	if (!blm_ctx || !blm_psoc_obj) {
+		blm_err("blm_ctx or blm_psoc_obj is NULL");
+		return ;
+	}
+
+	status = qdf_mutex_acquire(&blm_ctx->reject_ap_list_lock);
+	if (QDF_IS_STATUS_ERROR(status)) {
+		blm_err("failed to acquire reject_ap_list_lock");
 		return;
 	}
 
+	cfg = &blm_psoc_obj->blm_cfg;
+
 	blm_flush_reject_ap_list(blm_ctx);
+	blm_send_reject_ap_list_to_fw(pdev, &blm_ctx->reject_ap_list, cfg);
+	qdf_mutex_release(&blm_ctx->reject_ap_list_lock);
 }