qcacld-3.0: Don't allow SAP CSA to ML-STA ch while it's disconnecting

Currently, SAP gets moved to STA channel when SAP causes MCC
upon STA connection. Same is true for ML-STA where SAP is in
same band as one of the ML-STA links, even if the ML-STA is
in DFS channel.
But STA may receive disconnect request from userspace just
after connect completion. If SAP-CSA is started before receiving
disconnect request, CSA is supposed to be aborted as the STA
would be gone out of the DFS channel.
If SAP-CSA is not aborted, host driver may send VDEV_RESTART on
the STA DFS channel without cac timer and firmware allows SAP to
proceed with VDEV_UP. Host driver doesn't send VDEV_UP as the SAP
channel is not valid anymore. Firmware waits for SAP VDEV_UP and
may cause inconsistency in firmware state machine as host doesn't
send VDEV_UP at all.
So, abort SAP restart if any of the STA/ML-STA links/P2P client
are in disconnecting to avoid this.

Change-Id: I8d229686d9dae685ed680592396bb7cf389f6011
CRs-Fixed: 3667305

components/cmn_services/policy_mgr/src/wlan_policy_mgr_get_set_utils.c

@@ -11218,7 +11218,9 @@ bool policy_mgr_is_sap_allowed_on_dfs_freq(struct wlan_objmgr_pdev *pdev,
 {
 	struct wlan_objmgr_psoc *psoc;
 	uint32_t sta_sap_scc_on_dfs_chan;
-	uint32_t sta_cnt, gc_cnt;
+	uint32_t sta_cnt, gc_cnt, idx;
+	uint8_t vdev_id_list[MAX_NUMBER_OF_CONC_CONNECTIONS] = {0};
+	struct wlan_objmgr_vdev *vdev;
 
 	psoc = wlan_pdev_get_psoc(pdev);
 	if (!psoc)
@@ -11226,10 +11228,12 @@ bool policy_mgr_is_sap_allowed_on_dfs_freq(struct wlan_objmgr_pdev *pdev,
 
 	sta_sap_scc_on_dfs_chan =
 		policy_mgr_is_sta_sap_scc_allowed_on_dfs_chan(psoc);
-	sta_cnt = policy_mgr_mode_specific_connection_count(psoc,
-							    PM_STA_MODE, NULL);
-	gc_cnt = policy_mgr_mode_specific_connection_count(psoc,
-						PM_P2P_CLIENT_MODE, NULL);
+	sta_cnt = policy_mgr_get_mode_specific_conn_info(psoc, NULL,
+							 vdev_id_list,
+							 PM_STA_MODE);
+	gc_cnt = policy_mgr_get_mode_specific_conn_info(psoc, NULL,
+							&vdev_id_list[sta_cnt],
+							PM_P2P_CLIENT_MODE);
 
 	policy_mgr_debug("sta_sap_scc_on_dfs_chan %u, sta_cnt %u, gc_cnt %u",
 			 sta_sap_scc_on_dfs_chan, sta_cnt, gc_cnt);
@@ -11245,6 +11249,30 @@ bool policy_mgr_is_sap_allowed_on_dfs_freq(struct wlan_objmgr_pdev *pdev,
 		return false;
 	}
 
+	/*
+	 * Check if any of the concurrent STA/ML-STA link/P2P client are in
+	 * disconnecting state and disallow current SAP CSA. Concurrencies
+	 * would be re-evaluated upon disconnect completion and SAP would be
+	 * moved to right channel.
+	 */
+	for (idx = 0; idx < sta_cnt + gc_cnt; idx++) {
+		vdev = wlan_objmgr_get_vdev_by_id_from_psoc(psoc,
+							    vdev_id_list[idx],
+							    WLAN_POLICY_MGR_ID);
+		if (!vdev) {
+			policy_mgr_err("Invalid vdev");
+			return false;
+		}
+		if (wlan_cm_is_vdev_disconnecting(vdev) ||
+		    mlo_is_any_link_disconnecting(vdev)) {
+			policy_mgr_err("SAP is not allowed to move to DFS channel at this time, vdev %d",
+				       vdev_id_list[idx]);
+			wlan_objmgr_vdev_release_ref(vdev, WLAN_POLICY_MGR_ID);
+			return false;
+		}
+		wlan_objmgr_vdev_release_ref(vdev, WLAN_POLICY_MGR_ID);
+	}
+
 	return true;
 }