From 296931843a72a6bff5e10d893d4128ffd4cd9324 Mon Sep 17 00:00:00 2001 From: Henry Yen Date: Thu, 22 Feb 2024 11:24:46 +0800 Subject: wifi: mt76: mt7915: fix bogus Tx/Rx airtime duration values Do not report measurements if the airtime counter was cleared since the last update (possibly by firmware) Signed-off-by: Henry Yen Signed-off-by: Felix Fietkau --- drivers/net/wireless/mediatek/mt76/mt7915/mac.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c index e45361111f9b..f350b3f7a0bd 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c @@ -140,8 +140,15 @@ static void mt7915_mac_sta_poll(struct mt7915_dev *dev) msta->airtime_ac[i] = mt76_rr(dev, addr); msta->airtime_ac[i + 4] = mt76_rr(dev, addr + 4); - tx_time[i] = msta->airtime_ac[i] - tx_last; - rx_time[i] = msta->airtime_ac[i + 4] - rx_last; + if (msta->airtime_ac[i] <= tx_last) + tx_time[i] = 0; + else + tx_time[i] = msta->airtime_ac[i] - tx_last; + + if (msta->airtime_ac[i + 4] <= rx_last) + rx_time[i] = 0; + else + rx_time[i] = msta->airtime_ac[i + 4] - rx_last; if ((tx_last | rx_last) & BIT(30)) clear = true; -- cgit