[PATCH 5.19 248/717] wifi: mt76: mt7915: fix mcs value in ht mode

Greg Kroah-Hartman
2022-10-22T07:52:26Z

From: Howard Hsu <howard-yh.hsu@mediatek.com>

[ Upstream commit c6d3e16ad4362502e804a6ca01e955612f3b8222 ]

Fix the error that mcs will be reduced to a range of 0 to 7 in ht mode.

Fixes: 70fd1333cd32 ("mt76: mt7915: rework .set_bitrate_mask() to support more options")
Signed-off-by: Howard Hsu <howard-yh.hsu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/wireless/mediatek/mt76/mt7915/mcu.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index 17fa2acc0d07..ec8a5083466f 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -1460,7 +1460,7 @@ mt7915_mcu_add_rate_ctrl_fixed(struct mt7915_dev *dev,
struct sta_phy phy = {};
int ret, nrates = 0;

-#define __sta_phy_bitrate_mask_check(_mcs, _gi, _he) \
+#define __sta_phy_bitrate_mask_check(_mcs, _gi, _ht, _he) \
do { \
u8 i, gi = mask->control[band]._gi; \
gi = (_he) ? gi : gi == NL80211_TXRATE_FORCE_SGI; \
@@ -1473,15 +1473,17 @@ mt7915_mcu_add_rate_ctrl_fixed(struct mt7915_dev *dev,
continue; \
nrates += hweight16(mask->control[band]._mcs[i]); \
phy.mcs = ffs(mask->control[band]._mcs[i]) - 1; \
+ if (_ht) \
+ phy.mcs += 8 * i; \
} \
} while (0)

if (sta->deflink.he_cap.has_he) {
- __sta_phy_bitrate_mask_check(he_mcs, he_gi, 1);
+ __sta_phy_bitrate_mask_check(he_mcs, he_gi, 0, 1);
} else if (sta->deflink.vht_cap.vht_supported) {
- __sta_phy_bitrate_mask_check(vht_mcs, gi, 0);
+ __sta_phy_bitrate_mask_check(vht_mcs, gi, 0, 0);
} else if (sta->deflink.ht_cap.ht_supported) {
- __sta_phy_bitrate_mask_check(ht_mcs, gi, 0);
+ __sta_phy_bitrate_mask_check(ht_mcs, gi, 1, 0);
} else {
nrates = hweight32(mask->control[band].legacy);
phy.mcs = ffs(mask->control[band].legacy) - 1;
--
2.35.1