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ath9k: fix per-packet tx power configuration 

Do not use ieee80211_vif pointer in ath_get_rate_txpower() since it has been
overwritten by setup_frame_info() and it will result in a corrupted tx power
configuration. Set per-packet tx power in setup_frame_info() according to
current vif tx power.

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Lorenzo Bianconi 2015-04-08 20:51:57 +02:00 committed by Kalle Valo
parent 0581276deb
commit f673821864
1 changed files with 25 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
drivers/net/wireless/ath/ath9k/xmit.c
View File

@ -1103,28 +1103,14 @@ static u8 ath_get_rate_txpower(struct ath_softc *sc, struct ath_buf *bf,
struct sk_buff *skb;
struct ath_frame_info *fi;
struct ieee80211_tx_info *info;
struct ieee80211_vif *vif;
struct ath_hw *ah = sc->sc_ah;
if (sc->tx99_state || !ah->tpc_enabled)
return MAX_RATE_POWER;
skb = bf->bf_mpdu;
info = IEEE80211_SKB_CB(skb);
vif = info->control.vif;
if (!vif) {
max_power = sc->cur_chan->cur_txpower;
goto out;
}
if (vif->bss_conf.txpower_type != NL80211_TX_POWER_LIMITED) {
max_power = min_t(u8, sc->cur_chan->cur_txpower,
2 * vif->bss_conf.txpower);
goto out;
}
fi = get_frame_info(skb);
info = IEEE80211_SKB_CB(skb);
if (!AR_SREV_9300_20_OR_LATER(ah)) {
int txpower = fi->tx_power;
@ -1161,25 +1147,26 @@ static u8 ath_get_rate_txpower(struct ath_softc *sc, struct ath_buf *bf,
txpower -= 2;
txpower = max(txpower, 0);
max_power = min_t(u8, ah->tx_power[rateidx],
2 * vif->bss_conf.txpower);
max_power = min_t(u8, max_power, txpower);
max_power = min_t(u8, ah->tx_power[rateidx], txpower);
/* XXX: clamp minimum TX power at 1 for AR9160 since if
* max_power is set to 0, frames are transmitted at max
* TX power
*/
if (!max_power && !AR_SREV_9280_20_OR_LATER(ah))
max_power = 1;
} else if (!bf->bf_state.bfs_paprd) {
if (rateidx < 8 && (info->flags & IEEE80211_TX_CTL_STBC))
max_power = min_t(u8, ah->tx_power_stbc[rateidx],
2 * vif->bss_conf.txpower);
fi->tx_power);
else
max_power = min_t(u8, ah->tx_power[rateidx],
2 * vif->bss_conf.txpower);
max_power = min(max_power, fi->tx_power);
fi->tx_power);
} else {
max_power = ah->paprd_training_power;
}
out:
/* XXX: clamp minimum TX power at 1 for AR9160 since if max_power
* is set to 0, frames are transmitted at max TX power
*/
return (!max_power && !AR_SREV_9280_20_OR_LATER(ah)) ? 1 : max_power;
return max_power;
}
static void ath_buf_set_rate(struct ath_softc *sc, struct ath_buf *bf,
@ -2129,6 +2116,7 @@ static void setup_frame_info(struct ieee80211_hw *hw,
struct ath_node *an = NULL;
enum ath9k_key_type keytype;
bool short_preamble = false;
u8 txpower;
/*
* We check if Short Preamble is needed for the CTS rate by
@ -2145,6 +2133,16 @@ static void setup_frame_info(struct ieee80211_hw *hw,
if (sta)
an = (struct ath_node *) sta->drv_priv;
if (tx_info->control.vif) {
struct ieee80211_vif *vif = tx_info->control.vif;
txpower = 2 * vif->bss_conf.txpower;
} else {
struct ath_softc *sc = hw->priv;
txpower = sc->cur_chan->cur_txpower;
}
memset(fi, 0, sizeof(*fi));
fi->txq = -1;
if (hw_key)
@ -2155,7 +2153,7 @@ static void setup_frame_info(struct ieee80211_hw *hw,
fi->keyix = ATH9K_TXKEYIX_INVALID;
fi->keytype = keytype;
fi->framelen = framelen;
fi->tx_power = MAX_RATE_POWER;
fi->tx_power = txpower;
if (!rate)
return;