From cc61d3ced2aac08230f20809378c5e3134f6702d Mon Sep 17 00:00:00 2001 From: Emmanuel Grumbach Date: Sun, 11 Apr 2021 13:25:38 +0300 Subject: [PATCH] iwlwifi: mvm: don't disconnect immediately if we don't hear beacons after CSA When we switch channel, we may miss a few beacons on the new channel. Don't disconnect if the time event for the switch ends before we hear the beacons. Note that this is relevant only for old devices that still use the TIME_EVENT firmware API for channel switch. The check that we hear a beacon before the time event ends was meant to be used for the association time event and not for the channel switch time event. Signed-off-by: Emmanuel Grumbach Signed-off-by: Luca Coelho Link: https://lore.kernel.org/r/iwlwifi.20210411132130.3d710091a0bd.I37a161ffdfb099a10080fbdc3b70a4deb76952e2@changeid Signed-off-by: Luca Coelho --- drivers/net/wireless/intel/iwlwifi/mvm/time-event.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c index 1418a6438635..76c36f5cf9a3 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/time-event.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause /* - * Copyright (C) 2012-2014, 2018-2020 Intel Corporation + * Copyright (C) 2012-2014, 2018-2021 Intel Corporation * Copyright (C) 2013-2015 Intel Mobile Communications GmbH * Copyright (C) 2017 Intel Deutschland GmbH */ @@ -295,6 +295,17 @@ static void iwl_mvm_te_handle_notif(struct iwl_mvm *mvm, break; case NL80211_IFTYPE_STATION: /* + * If we are switching channel, don't disconnect + * if the time event is already done. Beacons can + * be delayed a bit after the switch. + */ + if (te_data->id == TE_CHANNEL_SWITCH_PERIOD) { + IWL_DEBUG_TE(mvm, + "No beacon heard and the CS time event is over, don't disconnect\n"); + break; + } + + /* * By now, we should have finished association * and know the dtim period. */ -- 2.11.0