[PATCH 5.15 473/917] mt76: mt7921: fix firmware usage of RA info using legacy rates
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2021-11-16 00:52:08
Also in:
lkml
Subsystem:
mediatek mt76 wireless lan driver, the rest · Maintainers:
Felix Fietkau, Lorenzo Bianconi, Ryder Lee, Linus Torvalds
From: Sean Wang <sean.wang@mediatek.com>
[ Upstream commit 99b8e195994d9d77de3bfe0cb403c44a57c2cf79 ]
According to the firmware usage, OFDM rates should fill out bit 6 - 13
while CCK rates should fill out bit 0 - 3 in legacy field of RA info to
make the rate adaption runs propertly. Otherwise, a unicast frame might be
picking up the unsupported rate to send out.
Fixes: 1c099ab44727 ("mt76: mt7921: add MCU support")
Reported-by: Joshua Emele <redacted>
Co-developed-by: YN Chen <redacted>
Signed-off-by: YN Chen <redacted>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c | 11 ++++++++++-
drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.h | 2 ++
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
index f57f047fce99c..98d233e24afcc 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c@@ -719,6 +719,7 @@ void mt76_connac_mcu_sta_tlv(struct mt76_phy *mphy, struct sk_buff *skb, struct sta_rec_state *state; struct sta_rec_phy *phy; struct tlv *tlv; + u16 supp_rates; /* starec ht */ if (sta->ht_cap.ht_supported) {
@@ -767,7 +768,15 @@ void mt76_connac_mcu_sta_tlv(struct mt76_phy *mphy, struct sk_buff *skb, tlv = mt76_connac_mcu_add_tlv(skb, STA_REC_RA, sizeof(*ra_info)); ra_info = (struct sta_rec_ra_info *)tlv; - ra_info->legacy = cpu_to_le16((u16)sta->supp_rates[band]); + + supp_rates = sta->supp_rates[band]; + if (band == NL80211_BAND_2GHZ) + supp_rates = FIELD_PREP(RA_LEGACY_OFDM, supp_rates >> 4) | + FIELD_PREP(RA_LEGACY_CCK, supp_rates & 0xf); + else + supp_rates = FIELD_PREP(RA_LEGACY_OFDM, supp_rates); + + ra_info->legacy = cpu_to_le16(supp_rates); if (sta->ht_cap.ht_supported) memcpy(ra_info->rx_mcs_bitmask, sta->ht_cap.mcs.rx_mask,
diff --git a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.h b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.h
index 4bcd728ff97c5..77d4435e4581e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.h@@ -124,6 +124,8 @@ struct sta_rec_state { u8 rsv[1]; } __packed; +#define RA_LEGACY_OFDM GENMASK(13, 6) +#define RA_LEGACY_CCK GENMASK(3, 0) #define HT_MCS_MASK_NUM 10 struct sta_rec_ra_info { __le16 tag;
--
2.33.0