From 063ffcd8a8fdb835e3d74082b4dc411750f2a234 Mon Sep 17 00:00:00 2001
From: Evelyn Tsai <evelyn.tsai@mediatek.com>
Date: Sat, 18 Nov 2023 07:36:45 +0800
Subject: [PATCH] wifi: mt76: ACS channel time too long on duty channel

Step and issue:
1. Set channel to 36 in hostapd config;
2. Bootup;
3. Enable ACS through UCI command and reload;
4. Check hostapd log, channel 36 channel_time is much longer than other channels.

Root cause:
The reset chan_stat condition missed duty channel.

Solution:
When scan start, need to reset chan_stat in each channel switch.
---
 mac80211.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mac80211.c b/mac80211.c
index aaaf6a9..0b13602 100644
--- a/mac80211.c
+++ b/mac80211.c
@@ -931,7 +931,7 @@ void mt76_set_channel(struct mt76_phy *phy)
 	if (!offchannel)
 		phy->main_chan = chandef->chan;
 
-	if (chandef->chan != phy->main_chan)
+	if (chandef->chan != phy->main_chan || test_bit(MT76_SCANNING, &phy->state))
 		memset(phy->chan_state, 0, sizeof(*phy->chan_state));
 }
 EXPORT_SYMBOL_GPL(mt76_set_channel);
-- 
2.18.0