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| author | Felix Fietkau <nbd@nbd.name> | 2026-07-22 08:26:01 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@nbd.name> | 2026-07-31 12:25:40 +0000 |
| commit | 4a2f4be532e3ea4e2b536e411793a05aaa51af25 (patch) | |
| tree | b3fe97a95397e037909c4510a7c115235e2eeb17 | |
| parent | 6486e11a6e2f679597af2d5bb48c3b07a2b2a7ba (diff) | |
| download | linux-next-4a2f4be532e3ea4e2b536e411793a05aaa51af25.tar.gz linux-next-4a2f4be532e3ea4e2b536e411793a05aaa51af25.zip | |
wifi: mt76: mt7915: avoid nss underflow in mt7915_mcu_get_sta_nss
If a peer's VHT/HE MCS map has no supported spatial stream (all fields
0x3), the loop exits with nss == 0 and the function returned (u8)-1 (255),
which was then written into the firmware sta_rec_bf beamforming fields.
Clamp the result to 0.
Fixes: 89029a85482c ("mt76: mt7915: add Tx beamformer support")
Link: https://patch.msgid.link/20260722082610.2699628-9-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7915/mcu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c index bbb2fedacb25..119bd3582295 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c @@ -51,7 +51,7 @@ mt7915_mcu_get_sta_nss(u16 mcs_map) break; } - return nss - 1; + return nss ? nss - 1 : 0; } static void |