[PATCH AUTOSEL 4.14 015/103] ath9k: fix tx99 with monitor mode interface

Sasha Levin
2019-11-08T12:01:41Z

From: Felix Fietkau <nbd@nbd.name>

[ Upstream commit d9c52fd17cb483bd8a470398afcb79f86c1b77c8 ]

Tx99 is typically configured via a monitor mode interface, which does
not get added to the driver as a vif. Since the code currently expects
a configured virtual interface for tx99, enabling tx99 via debugfs fails.
Since the vif is not needed anyway, remove all checks for it.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
[kvalo@codeaurora.org: s/CPTCFG/CONFIG/]
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/ath/ath9k/ath9k.h | 1 -
drivers/net/wireless/ath/ath9k/main.c | 12 +++---------
drivers/net/wireless/ath/ath9k/tx99.c | 9 ---------
drivers/net/wireless/ath/ath9k/xmit.c | 2 +-
4 files changed, 4 insertions(+), 20 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index f9339b5c3624b..db2b119199d7b 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -1074,7 +1074,6 @@ struct ath_softc {

struct ath_spec_scan_priv spec_priv;

- struct ieee80211_vif *tx99_vif;
struct sk_buff *tx99_skb;
bool tx99_state;
s16 tx99_power;
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 8b4ac7f0a09b7..055f869516804 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1250,15 +1250,10 @@ static int ath9k_add_interface(struct ieee80211_hw *hw,
struct ath_vif *avp = (void *)vif->drv_priv;
struct ath_node *an = &avp->mcast_node;

- mutex_lock(&sc->mutex);
+ if (IS_ENABLED(CONFIG_ATH9K_TX99))
+ return -EOPNOTSUPP;

- if (IS_ENABLED(CONFIG_ATH9K_TX99)) {
- if (sc->cur_chan->nvifs >= 1) {
- mutex_unlock(&sc->mutex);
- return -EOPNOTSUPP;
- }
- sc->tx99_vif = vif;
- }
+ mutex_lock(&sc->mutex);

ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type);
sc->cur_chan->nvifs++;
@@ -1341,7 +1336,6 @@ static void ath9k_remove_interface(struct ieee80211_hw *hw,
ath9k_p2p_remove_vif(sc, vif);

sc->cur_chan->nvifs--;
- sc->tx99_vif = NULL;
if (!ath9k_is_chanctx_enabled())
list_del(&avp->list);

diff --git a/drivers/net/wireless/ath/ath9k/tx99.c b/drivers/net/wireless/ath/ath9k/tx99.c
index fe3a8263b2241..311547f532bc3 100644
--- a/drivers/net/wireless/ath/ath9k/tx99.c
+++ b/drivers/net/wireless/ath/ath9k/tx99.c
@@ -54,12 +54,6 @@ static struct sk_buff *ath9k_build_tx99_skb(struct ath_softc *sc)
struct ieee80211_hdr *hdr;
struct ieee80211_tx_info *tx_info;
struct sk_buff *skb;
- struct ath_vif *avp;
-
- if (!sc->tx99_vif)
- return NULL;
-
- avp = (struct ath_vif *)sc->tx99_vif->drv_priv;

skb = alloc_skb(len, GFP_KERNEL);
if (!skb)
@@ -77,14 +71,11 @@ static struct sk_buff *ath9k_build_tx99_skb(struct ath_softc *sc)
memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);

- hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
-
tx_info = IEEE80211_SKB_CB(skb);
memset(tx_info, 0, sizeof(*tx_info));
rate = &tx_info->control.rates[0];
tx_info->band = sc->cur_chan->chandef.chan->band;
tx_info->flags = IEEE80211_TX_CTL_NO_ACK;
- tx_info->control.vif = sc->tx99_vif;
rate->count = 1;
if (ah->curchan && IS_CHAN_HT(ah->curchan)) {
rate->flags |= IEEE80211_TX_RC_MCS;
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 458c4f53ba5d1..a743e3535d0a8 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -2952,7 +2952,7 @@ int ath9k_tx99_send(struct ath_softc *sc, struct sk_buff *skb,
return -EINVAL;
}

- ath_set_rates(sc->tx99_vif, NULL, bf);
+ ath_set_rates(NULL, NULL, bf);

ath9k_hw_set_desc_link(sc->sc_ah, bf->bf_desc, bf->bf_daddr);
ath9k_hw_tx99_start(sc->sc_ah, txctl->txq->axq_qnum);
--
2.20.1