From 37438532b656f4d0d0600988020fe5c794679d5c Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Mon, 30 Jul 2018 21:31:28 +0300 Subject: [PATCH] ath9k_hw: fix channel maximum power level test [ Upstream commit 461d8a6bb9879b0e619752d040292e67aa06f1d2 ] The tx power applied by set_txpower is limited by the CTL (conformance test limit) entries in the EEPROM. These can change based on the user configured regulatory domain. Depending on the EEPROM data this can cause the tx power to become too limited, if the original regdomain CTLs impose lower limits than the CTLs of the user configured regdomain. To fix this issue, set the initial channel limits without any CTL restrictions and only apply the CTL at run time when setting the channel and the real tx power. Signed-off-by: Felix Fietkau Signed-off-by: Kalle Valo Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/ath/ath9k/hw.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index acef4ec9..951bac2 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -2915,16 +2915,19 @@ void ath9k_hw_apply_txpower(struct ath_hw *ah, struct ath9k_channel *chan, struct ath_regulatory *reg = ath9k_hw_regulatory(ah); struct ieee80211_channel *channel; int chan_pwr, new_pwr; + u16 ctl = NO_CTL; if (!chan) return; + if (!test) + ctl = ath9k_regd_get_ctl(reg, chan); + channel = chan->chan; chan_pwr = min_t(int, channel->max_power * 2, MAX_RATE_POWER); new_pwr = min_t(int, chan_pwr, reg->power_limit); - ah->eep_ops->set_txpower(ah, chan, - ath9k_regd_get_ctl(reg, chan), + ah->eep_ops->set_txpower(ah, chan, ctl, get_antenna_gain(ah, chan), new_pwr, test); } -- 2.7.4