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From:   Felix Fietkau <nbd@nbd.name>
To:     linux-wireless@vger.kernel.org
Subject: [PATCH 4/9] mt76: mt7615: never use an 802.11b CF-End rate on 5GHz
Date:   Wed, 22 Apr 2020 18:04:32 +0200
Message-Id: <20200422160437.99466-4-nbd@nbd.name>
In-Reply-To: <20200422160437.99466-1-nbd@nbd.name>
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Sometimes mt7615_mac_set_timing gets called while the slot time is still
configured to 20. Ensure that in this case it always uses the OFDM CFend
rate.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/net/wireless/mediatek/mt76/mt7615/mac.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
index 396f11e1bbf6..63c7acfd4cc2 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7615/mac.c
@@ -117,8 +117,9 @@ void mt7615_mac_set_timing(struct mt7615_phy *phy)
 	u32 ofdm = FIELD_PREP(MT_TIMEOUT_VAL_PLCP, 60) |
 		   FIELD_PREP(MT_TIMEOUT_VAL_CCA, 24);
 	int sifs, offset;
+	bool is_5ghz = phy->mt76->chandef.chan->band == NL80211_BAND_5GHZ;
 
-	if (phy->mt76->chandef.chan->band == NL80211_BAND_5GHZ)
+	if (is_5ghz)
 		sifs = 16;
 	else
 		sifs = 10;
@@ -151,7 +152,7 @@ void mt7615_mac_set_timing(struct mt7615_phy *phy)
 		FIELD_PREP(MT_IFS_SIFS, sifs) |
 		FIELD_PREP(MT_IFS_SLOT, phy->slottime));
 
-	if (phy->slottime < 20)
+	if (phy->slottime < 20 || is_5ghz)
 		val = MT7615_CFEND_RATE_DEFAULT;
 	else
 		val = MT7615_CFEND_RATE_11B;
-- 
2.24.0