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From:   Felix Fietkau <nbd@nbd.name>
To:     linux-wireless@vger.kernel.org
Subject: [PATCH 4/4] mt76: mt7603: fix invalid fallback rates
Date:   Fri, 12 Jul 2019 08:20:45 +0200
Message-Id: <20190712062045.85109-4-nbd@nbd.name>
In-Reply-To: <20190712062045.85109-1-nbd@nbd.name>
References: <20190712062045.85109-1-nbd@nbd.name>
Sender: linux-wireless-owner@vger.kernel.org
Precedence: bulk

Only decrement the rate index on duplicate rates if it is not already 0

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/net/wireless/mediatek/mt76/mt7603/mac.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/mac.c b/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
index 40db1cbc832d..81fb4276e742 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
@@ -639,6 +639,9 @@ void mt7603_wtbl_set_rates(struct mt7603_dev *dev, struct mt7603_sta *sta,
 			    IEEE80211_TX_RC_40_MHZ_WIDTH)
 				continue;
 
+			if (!rates[i].idx)
+				continue;
+
 			rates[i].idx--;
 		}
 
-- 
2.17.0