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wifi: mt76: mt7915: avoid nss underflow in mt7915_mcu_get_sta_nss

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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/[email protected]
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Felix Fietkau
2026-07-22 10:51:04 +02:00
parent 1920d6dc68
commit f7b7fde7a0
1 changed files with 1 additions and 1 deletions
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mt7915/mcu.c
+1 -1
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@@ -51,7 +51,7 @@ mt7915_mcu_get_sta_nss(u16 mcs_map)
break;
}
return nss - 1;
return nss ? nss - 1 : 0;
}
static void