qcacld-3.0: add NULL check before calling rps_enable cb

Add a NULL check before calling rps_enable callback
from ipa_set_rps_per_vdev and also add a check to avoid
disabling rps twice.

Change-Id: Ib63b2cda99aa332905df640ffa2d401c22845ad2
CRs-Fixed: 2876490

components/ipa/core/inc/wlan_ipa_core.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2020 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2013-2021 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
@@ -592,7 +592,8 @@ static inline
 void ipa_set_rps_per_vdev(struct wlan_ipa_priv *ipa_ctx, uint8_t vdev_id,
 			  bool enable)
 {
-	ipa_ctx->rps_enable(vdev_id, enable);
+	if (ipa_ctx->rps_enable)
+		ipa_ctx->rps_enable(vdev_id, enable);
 }
 
 /**

components/ipa/core/src/wlan_ipa_core.c

@@ -2437,7 +2437,7 @@ static QDF_STATUS __wlan_ipa_wlan_evt(qdf_netdev_t net_dev, uint8_t device_mode,
 		if (iface_ctx)
 			wlan_ipa_cleanup_iface(iface_ctx);
 
-		if (qdf_ipa_get_lan_rx_napi())
+		if (qdf_ipa_get_lan_rx_napi() && ipa_ctx->sap_num_connected_sta)
 			ipa_set_rps_per_vdev(ipa_ctx, session_id, false);
 
 		qdf_mutex_release(&ipa_ctx->event_lock);