diff options
| -rw-r--r-- | package/kernel/mac80211/patches/324-ath9k_hw-fix-channel-maximum-power-level-test.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/324-ath9k_hw-fix-channel-maximum-power-level-test.patch b/package/kernel/mac80211/patches/324-ath9k_hw-fix-channel-maximum-power-level-test.patch new file mode 100644 index 0000000000..67cbe92e59 --- /dev/null +++ b/package/kernel/mac80211/patches/324-ath9k_hw-fix-channel-maximum-power-level-test.patch @@ -0,0 +1,47 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Wed, 22 Mar 2017 20:37:04 +0100 +Subject: [PATCH] ath9k_hw: fix channel maximum power level test + +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 lowr 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. + +Cc: stable@vger.kernel.org +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/drivers/net/wireless/ath/ath9k/hw.c ++++ b/drivers/net/wireless/ath/ath9k/hw.c +@@ -2937,10 +2937,14 @@ void ath9k_hw_apply_txpower(struct ath_h + struct ieee80211_channel *channel; + int chan_pwr, new_pwr, max_gain; + int ant_gain, ant_reduction = 0; ++ 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); +@@ -2950,9 +2954,7 @@ void ath9k_hw_apply_txpower(struct ath_h + if (ant_gain > max_gain) + ant_reduction = ant_gain - max_gain; + +- ah->eep_ops->set_txpower(ah, chan, +- ath9k_regd_get_ctl(reg, chan), +- ant_reduction, new_pwr, test); ++ ah->eep_ops->set_txpower(ah, chan, ctl, ant_reduction, new_pwr, test); + } + + void ath9k_hw_set_txpowerlimit(struct ath_hw *ah, u32 limit, bool test) |