qcacmn: Check active peer to detect if MLO STA is connected

Currently in tx flow pool delete API to check if MLO STA is
connected, policy_mgr_is_mlo_sta_disconnected API is called.
Policy manager API takes mutex inside and flow pool delete API
can be called from soft irq context which can result in QDF ASSERT
logs.

To fix the issue instead of calling the policy manager API to check
if MLP STA is connected, loop through all the vdev peers and check if
there is any active peer. In the case of active peer defer the vdev
flow pool unmap.

Change-Id: If6338f3a060e17124950e6918039ee4cc786fee5
CRs-Fixed: 3382140

dp/wifi3.0/dp_tx_flow_control.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2015-2021 The Linux Foundation. All rights reserved.
- * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ * Copyright (c) 2021-2023 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
@@ -25,6 +25,7 @@
 #include <qdf_util.h>           /* qdf_unlikely */
 #include "dp_types.h"
 #include "dp_tx_desc.h"
+#include "dp_peer.h"
 
 #include <cdp_txrx_handle.h>
 #include "dp_internal.h"
@@ -392,6 +393,8 @@ struct dp_tx_desc_pool_s *dp_tx_create_flow_pool(struct dp_soc *soc,
 static bool dp_is_tx_flow_pool_delete_allowed(struct dp_soc *soc,
 					      uint8_t vdev_id)
 {
+	struct dp_peer *peer;
+	struct dp_peer *tmp_peer;
 	struct dp_vdev *vdev = NULL;
 	bool is_allow = true;
 
@@ -406,9 +409,19 @@ static bool dp_is_tx_flow_pool_delete_allowed(struct dp_soc *soc,
 	 * then it's not allowed to delete current pool, for legacy
 	 * connection, allowed always.
 	 */
-	is_allow = policy_mgr_is_mlo_sta_disconnected(
-			(struct wlan_objmgr_psoc *)soc->ctrl_psoc,
-			vdev_id);
+	qdf_spin_lock_bh(&vdev->peer_list_lock);
+	TAILQ_FOREACH_SAFE(peer, &vdev->peer_list,
+			   peer_list_elem,
+			   tmp_peer) {
+		if (dp_peer_get_ref(soc, peer, DP_MOD_ID_CONFIG) ==
+					QDF_STATUS_SUCCESS) {
+			if (peer->valid && !peer->sta_self_peer)
+				is_allow = false;
+			dp_peer_unref_delete(peer, DP_MOD_ID_CONFIG);
+		}
+	}
+	qdf_spin_unlock_bh(&vdev->peer_list_lock);
+
 comp_ret:
 	if (vdev)
 		dp_vdev_unref_delete(soc, vdev, DP_MOD_ID_MISC);