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Commit 81cec095 authored by Jianmin Zhu's avatar Jianmin Zhu
Browse files

qcacld-3.0: Don't send probe req when receive beacon miss 

Before host received beacon miss, firmware has checked link by sending
QoS NULL data, don't need host send probe request to check now.
Some IoT AP can send probe response after receive probe request, but can't
send beacon sometimes, need disconnect in time too, or firmware will
assert.

Change-Id: I74105769cfbd9f80cdde21bfa7b8c6d75efc4a3a
CRs-Fixed: 3102930
parent 539057ac

core/mac/src/pe/lim/lim_link_monitoring_algo.c

+14 −47
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2012-2020 The Linux Foundation. All rights reserved.

 * Copyright (c) 2012-2021 The Linux Foundation. All rights reserved.

 * Copyright (c) 2021-2022 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
@@ -452,9 +453,6 @@ lim_tear_down_link_with_ap(struct mac_context *mac, uint8_t sessionId, 
void lim_handle_heart_beat_failure(struct mac_context *mac_ctx,

				   struct pe_session *session)

{

	uint8_t curr_chan;

	tpSirAddie scan_ie = NULL;



#ifdef FEATURE_WLAN_DIAG_SUPPORT_LIM    /* FEATURE_WLAN_DIAG_SUPPORT */

	host_log_beacon_update_pkt_type *log_ptr = NULL;

#endif /* FEATURE_WLAN_DIAG_SUPPORT */
@@ -490,50 +488,19 @@ void lim_handle_heart_beat_failure(struct mac_context *mac_ctx, 
		mac_ctx->lim.gLimHBfailureCntInLinkEstState++;



		/*

		 * Check if connected on the DFS channel, if not connected on

		 * DFS channel then only send the probe request otherwise tear

		 * down the link

		 */

		curr_chan = wlan_reg_freq_to_chan(

					mac_ctx->pdev, session->curr_op_freq);

		if (!lim_isconnected_on_dfs_channel(mac_ctx, curr_chan)) {

			/* Detected continuous Beacon Misses */

			session->LimHBFailureStatus = true;



			/*Reset the HB packet count before sending probe*/

			limResetHBPktCount(session);

			/**

			 * Send Probe Request frame to AP to see if

			 * it is still around. Wait until certain

			 * timeout for Probe Response from AP.

			 */

			pe_debug("HB missed from AP. Sending Probe Req");

			/* for searching AP, we don't include any more IE */

			if (session->lim_join_req) {

				scan_ie = &session->lim_join_req->addIEScan;

				lim_send_probe_req_mgmt_frame(mac_ctx,

					&session->ssId,

					session->bssId, session->curr_op_freq,

					session->self_mac_addr,

					session->dot11mode,

					&scan_ie->length, scan_ie->addIEdata);

			} else {

				lim_send_probe_req_mgmt_frame(mac_ctx,

					&session->ssId,

					session->bssId, session->curr_op_freq,

					session->self_mac_addr,

					session->dot11mode, NULL, NULL);

			}

		} else {

			/*

			 * Connected on DFS channel so should not send the

			 * probe request tear down the link directly

		 * Before host received beacon miss, firmware has checked link

		 * by sending QoS NULL data, don't need host send probe req.

		 * Some IoT AP can send probe response, but can't send beacon

		 * sometimes, need disconnect too, or firmware will assert.

		 */

		lim_send_deauth_mgmt_frame(mac_ctx,

					   REASON_DISASSOC_DUE_TO_INACTIVITY,

					   session->bssId,

					   session, false);

		lim_tear_down_link_with_ap(mac_ctx,

					   session->peSessionId,

					   REASON_BEACON_MISSED,

					   eLIM_LINK_MONITORING_DEAUTH);

		}

	} else {

		/**

		 * Heartbeat timer may have timed out