linux-kernel - [PATCH AUTOSEL for 4.9 127/293] iwlwifi: mvm: track and report IBSS manager status to mac80211

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Date:   Mon, 9 Apr 2018 00:24:31 +0000
From:   Sasha Levin <Alexander.Levin@...rosoft.com>
To:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Johannes Berg <johannes.berg@...el.com>,
        Luca Coelho <luciano.coelho@...el.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>
Subject: [PATCH AUTOSEL for 4.9 127/293] iwlwifi: mvm: track and report IBSS
 manager status to mac80211

From: Johannes Berg <johannes.berg@...el.com>

[ Upstream commit 2f0282db41194c0099a019b2761911d6c69cbdb9 ]

Shaul reported that when iwlmvm was sending beacons, it didn't properly
also take ownership of the probe responses. This is because the whole
mac80211 callback (tx_last_beacon) wasn't implemented. Fix that to make
IBSS discovery work better.

Reported-by: Shaul Triebitz <shaul.triebitz@...el.com>
Signed-off-by: Luca Coelho <luciano.coelho@...el.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c | 1 +
 drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 9 +++++++++
 drivers/net/wireless/intel/iwlwifi/mvm/mvm.h      | 3 +++
 3 files changed, 13 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
index 6b962d6b067a..ee8b12424d03 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac-ctxt.c
@@ -1434,6 +1434,7 @@ void iwl_mvm_rx_beacon_notif(struct iwl_mvm *mvm,
 
 	beacon_notify_hdr = &beacon->beacon_notify_hdr;
 	mvm->ap_last_beacon_gp2 = le32_to_cpu(beacon->gp2);
+	mvm->ibss_manager = beacon->ibss_mgr_status != 0;
 
 	status = le16_to_cpu(beacon_notify_hdr->status.status) & TX_STATUS_MSK;
 	IWL_DEBUG_RX(mvm,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index f1231c0ea336..3d6401eafe52 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -3621,6 +3621,13 @@ static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
 	return ret;
 }
 
+static int iwl_mvm_tx_last_beacon(struct ieee80211_hw *hw)
+{
+	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+
+	return mvm->ibss_manager;
+}
+
 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
 			   struct ieee80211_sta *sta,
 			   bool set)
@@ -4218,6 +4225,8 @@ const struct ieee80211_ops iwl_mvm_hw_ops = {
 	.join_ibss = iwl_mvm_start_ap_ibss,
 	.leave_ibss = iwl_mvm_stop_ap_ibss,
 
+	.tx_last_beacon = iwl_mvm_tx_last_beacon,
+
 	.set_tim = iwl_mvm_set_tim,
 
 	.channel_switch = iwl_mvm_channel_switch,
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
index c60703e0c246..49e84efbbb0e 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -989,6 +989,9 @@ struct iwl_mvm {
 	/* system time of last beacon (for AP/GO interface) */
 	u32 ap_last_beacon_gp2;
 
+	/* indicates that we transmitted the last beacon */
+	bool ibss_manager;
+
 	bool lar_regdom_set;
 	enum iwl_mcc_source mcc_src;
 
-- 
2.15.1