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- From: Felix Fietkau <[email protected]>
- 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 3 dBi antenna gain. Account for
- this in the EEPROM based tx power reduction code.
- Signed-off-by: Felix Fietkau <[email protected]>
- ---
- --- a/drivers/net/wireless/ath/ath9k/hw.c
- +++ b/drivers/net/wireless/ath/ath9k/hw.c
- @@ -2954,6 +2954,10 @@ 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 3 dBi */
- + if (reg->region == NL80211_DFS_FCC)
- + ant_reduction = max_t(int, ant_reduction - 6, 0);
- +
- ah->eep_ops->set_txpower(ah, chan, ctl, ant_reduction, new_pwr, test);
- }
-
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