From 40a61c9b2c725da82bd60a39bc54b8884b0a57b5 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Wed, 22 Apr 2020 13:15:06 +0200
Subject: [PATCH] mt76: mt7603: fix tx status rate index calculation

A switch from one rate index to the next only happens when tx count from
the current slot is greater than MT7615_RATE_RETRY, which is 1 has to be
subtracted from count, instead of added to it.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/net/wireless/mediatek/mt76/mt7603/mac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/mac.c b/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
index d34828715e1c0e..f8c0c957ca01d2 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
@@ -1103,7 +1103,7 @@ mt7603_fill_txs(struct mt7603_dev *dev, struct mt7603_sta *sta,
 	if (ampdu || (info->flags & IEEE80211_TX_CTL_AMPDU))
 		info->flags |= IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_CTL_AMPDU;
 
-	first_idx = max_t(int, 0, last_idx - (count + 1) / MT7603_RATE_RETRY);
+	first_idx = max_t(int, 0, last_idx - (count - 1) / MT7603_RATE_RETRY);
 
 	if (fixed_rate && !probe) {
 		info->status.rates[0].count = count;
-- 
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