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@@ -0,0 +1,96 @@
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+From: Felix Fietkau <[email protected]>
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+Date: Sat, 22 Sep 2018 15:20:50 +0200
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+Subject: [PATCH] ath9k: add back support for using active monitor interfaces
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+ for tx99
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+
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+Various documented examples on how to set up tx99 with ath9k rely
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+on setting up a regular monitor interface for setting the channel.
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+My previous patch "ath9k: fix tx99 with monitor mode interface" made
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+it possible to set it up this way again. However, it was removing support
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+for using an active monitor interface, which is required for controlling
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+the bitrate as well, since the bitrate is not passed down with a regular
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+monitor interface.
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+
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+This patch partially reverts the previous one, but keeps support for using
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+a regular monitor interface to keep documented steps working in cases
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+where the bitrate does not matter
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+
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+Fixes: d9c52fd17cb48 ("ath9k: fix tx99 with monitor mode interface")
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+Signed-off-by: Felix Fietkau <[email protected]>
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+---
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+
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+--- a/drivers/net/wireless/ath/ath9k/ath9k.h
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++++ b/drivers/net/wireless/ath/ath9k/ath9k.h
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+@@ -1074,6 +1074,7 @@ struct ath_softc {
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+
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+ struct ath_spec_scan_priv spec_priv;
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+
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++ struct ieee80211_vif *tx99_vif;
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+ struct sk_buff *tx99_skb;
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+ bool tx99_state;
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+ s16 tx99_power;
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+--- a/drivers/net/wireless/ath/ath9k/main.c
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++++ b/drivers/net/wireless/ath/ath9k/main.c
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+@@ -1251,8 +1251,13 @@ static int ath9k_add_interface(struct ie
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+ struct ath_vif *avp = (void *)vif->drv_priv;
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+ struct ath_node *an = &avp->mcast_node;
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+
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+- if (IS_ENABLED(CPTCFG_ATH9K_TX99))
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+- return -EOPNOTSUPP;
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++ if (IS_ENABLED(CPTCFG_ATH9K_TX99)) {
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++ if (sc->cur_chan->nvifs >= 1) {
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++ mutex_unlock(&sc->mutex);
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++ return -EOPNOTSUPP;
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++ }
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++ sc->tx99_vif = vif;
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++ }
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+
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+ mutex_lock(&sc->mutex);
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+
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+@@ -1337,6 +1342,7 @@ static void ath9k_remove_interface(struc
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+ ath9k_p2p_remove_vif(sc, vif);
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+
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+ sc->cur_chan->nvifs--;
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++ sc->tx99_vif = NULL;
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+ if (!ath9k_is_chanctx_enabled())
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+ list_del(&avp->list);
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+
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+--- a/drivers/net/wireless/ath/ath9k/tx99.c
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++++ b/drivers/net/wireless/ath/ath9k/tx99.c
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+@@ -54,6 +54,7 @@ static struct sk_buff *ath9k_build_tx99_
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+ struct ieee80211_hdr *hdr;
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+ struct ieee80211_tx_info *tx_info;
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+ struct sk_buff *skb;
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++ struct ath_vif *avp;
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+
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+ skb = alloc_skb(len, GFP_KERNEL);
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+ if (!skb)
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+@@ -71,11 +72,17 @@ static struct sk_buff *ath9k_build_tx99_
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+ memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
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+ memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
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+
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++ if (sc->tx99_vif) {
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++ avp = (struct ath_vif *) sc->tx99_vif->drv_priv;
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++ hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
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++ }
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++
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+ tx_info = IEEE80211_SKB_CB(skb);
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+ memset(tx_info, 0, sizeof(*tx_info));
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+ rate = &tx_info->control.rates[0];
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+ tx_info->band = sc->cur_chan->chandef.chan->band;
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+ tx_info->flags = IEEE80211_TX_CTL_NO_ACK;
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++ tx_info->control.vif = sc->tx99_vif;
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+ rate->count = 1;
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+ if (ah->curchan && IS_CHAN_HT(ah->curchan)) {
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+ rate->flags |= IEEE80211_TX_RC_MCS;
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+--- a/drivers/net/wireless/ath/ath9k/xmit.c
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++++ b/drivers/net/wireless/ath/ath9k/xmit.c
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+@@ -2973,7 +2973,7 @@ int ath9k_tx99_send(struct ath_softc *sc
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+ return -EINVAL;
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+ }
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+
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+- ath_set_rates(NULL, NULL, bf);
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++ ath_set_rates(sc->tx99_vif, NULL, bf);
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+
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+ ath9k_hw_set_desc_link(sc->sc_ah, bf->bf_desc, bf->bf_daddr);
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+ ath9k_hw_tx99_start(sc->sc_ah, txctl->txq->axq_qnum);
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Felix Fietkau