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From: Zefir Kurtisi <zefir.kurtisi@neratec.com>
Date: Tue, 16 Jun 2015 11:46:42 +0200
Subject: [PATCH] ath9k: DFS - consider ext_channel pulses only in HT40
mode
The chip reports radar pulses on extension channel
even if operating in HT20 mode. This patch adds a
sanity check for HT40 mode before it feeds pulses
on extension channel to the pattern detector.
Signed-off-by: Zefir Kurtisi <zefir.kurtisi@neratec.com>
---
--- a/drivers/net/wireless/ath/ath9k/dfs.c
+++ b/drivers/net/wireless/ath/ath9k/dfs.c
@@ -198,7 +198,8 @@ void ath9k_dfs_process_phyerr(struct ath
sc->dfs_prev_pulse_ts = pe.ts;
if (ard.pulse_bw_info & PRI_CH_RADAR_FOUND)
ath9k_dfs_process_radar_pulse(sc, &pe);
- if (ard.pulse_bw_info & EXT_CH_RADAR_FOUND) {
+ if (IS_CHAN_HT40(ah->curchan) &&
+ ard.pulse_bw_info & EXT_CH_RADAR_FOUND) {
pe.freq += IS_CHAN_HT40PLUS(ah->curchan) ? 20 : -20;
ath9k_dfs_process_radar_pulse(sc, &pe);
}
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