openwrt/package/kernel/mac80211/patches/ath/365-ath9k-adjust-tx-power-reduction-for-US-regulatory-do.patch
Hauke Mehrtens 0b2c42ced2 mac80211: Update to version 5.2-rc7
This updates mac80211 to version 5.2-rc7, this contains all the changes
to the wireless subsystem up to Linux 5.2-rc7.

* The removed patches are applied upstream
* b43 now uses kmod-lib-cordic
* Update the nl80211.h file in iw to match backports version.
* Remove the two backports from kernel 4.9, they were needed for mt76,
  but that can use the version from backports now, otherwise they
  collide and cause compile errors.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2019-07-18 00:22:04 +02:00

25 lines
761 B
Diff

From: Felix Fietkau <nbd@nbd.name>
Date: Wed, 19 Jul 2017 08:49:31 +0200
Subject: [PATCH] ath9k: adjust tx power reduction for US regulatory
domain
FCC regulatory rules allow for up to 6 dBi antenna gain. Account for
this in the EEPROM based tx power reduction code.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -2982,6 +2982,10 @@ void ath9k_hw_apply_txpower(struct ath_h
if (ant_gain > max_gain)
ant_reduction = ant_gain - max_gain;
+ /* FCC allows maximum antenna gain of 6 dBi */
+ if (reg->region == NL80211_DFS_FCC)
+ ant_reduction = max_t(int, ant_reduction - 12, 0);
+
ah->eep_ops->set_txpower(ah, chan, ctl,
ant_reduction, new_pwr, test);
}