Return-path: Received: from mail-wi0-f173.google.com ([209.85.212.173]:39703 "EHLO mail-wi0-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932310AbaKXOgf (ORCPT ); Mon, 24 Nov 2014 09:36:35 -0500 Received: by mail-wi0-f173.google.com with SMTP id r20so5865653wiv.6 for ; Mon, 24 Nov 2014 06:36:34 -0800 (PST) From: Emmanuel Grumbach To: linux-wireless@vger.kernel.org Cc: Luciano Coelho Subject: [PATCH 60/75] iwlwifi: mvm: add a channel_switch op to bypass mac80211 timer Date: Mon, 24 Nov 2014 16:34:36 +0200 Message-Id: <1416839691-28533-60-git-send-email-egrumbach@gmail.com> (sfid-20141124_153809_414663_050266FA) In-Reply-To: References: Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Luciano Coelho We need to call ieee80211_chswitch_done() ourselves just when the absence TE started, so we perform the actual context switch early enough. To do so, add a dummy channel_switch op, which will cause mac80211 to skip the countdown timer and allow us to call ieee80211_chswitch_done() to complete the operation. Signed-off-by: Luciano Coelho --- drivers/net/wireless/iwlwifi/mvm/mac80211.c | 15 +++++++++++++++ drivers/net/wireless/iwlwifi/mvm/time-event.c | 1 + 2 files changed, 16 insertions(+) diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c index c85c0f1..7acdfa7 100644 --- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c @@ -3143,6 +3143,20 @@ static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw, } #endif +static void iwl_mvm_channel_switch(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + struct ieee80211_channel_switch *chsw) +{ + /* By implementing this operation, we prevent mac80211 from + * starting its own channel switch timer, so that we can call + * ieee80211_chswitch_done() ourselves at the right time + * (which is when the absence time event starts). + */ + + IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw), + "dummy channel switch op\n"); +} + static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_channel_switch *chsw) @@ -3336,6 +3350,7 @@ const struct ieee80211_ops iwl_mvm_hw_ops = { .set_tim = iwl_mvm_set_tim, + .channel_switch = iwl_mvm_channel_switch, .pre_channel_switch = iwl_mvm_pre_channel_switch, .post_channel_switch = iwl_mvm_post_channel_switch, diff --git a/drivers/net/wireless/iwlwifi/mvm/time-event.c b/drivers/net/wireless/iwlwifi/mvm/time-event.c index 1a537be..ff631cc 100644 --- a/drivers/net/wireless/iwlwifi/mvm/time-event.c +++ b/drivers/net/wireless/iwlwifi/mvm/time-event.c @@ -207,6 +207,7 @@ iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm, break; case NL80211_IFTYPE_STATION: iwl_mvm_csa_client_absent(mvm, te_data->vif); + ieee80211_chswitch_done(te_data->vif, true); break; default: /* should never happen */ -- 1.9.1