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    Subject[PATCH 5.15 468/917] mt76: mt7915: fix bit fields for HT rate idx
    Date
    From: Shayne Chen <shayne.chen@mediatek.com>

    [ Upstream commit 47f1c08db7f3aaa2d13f8e56209375462ace7b8a ]

    The bit fields of tx rate idx should be 6 bits, otherwise it might be
    incorrect in HT mode.
    For VHT/HE rates, only 4 bits are actually used by rate idx, the other
    2 bits are used for other functions.

    Fixes: c31d94af1843 ("mt76: mt7915: fix tx rate related fields in tx descriptor")
    Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
    Signed-off-by: Felix Fietkau <nbd@nbd.name>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/net/wireless/mediatek/mt76/mt7915/mac.h | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.h b/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
    index eb1885f4bd8eb..fee7741b5d421 100644
    --- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
    +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.h
    @@ -272,7 +272,8 @@ enum tx_mcu_port_q_idx {
    #define MT_TX_RATE_MODE GENMASK(9, 6)
    #define MT_TX_RATE_SU_EXT_TONE BIT(5)
    #define MT_TX_RATE_DCM BIT(4)
    -#define MT_TX_RATE_IDX GENMASK(3, 0)
    +/* VHT/HE only use bits 0-3 */
    +#define MT_TX_RATE_IDX GENMASK(5, 0)

    #define MT_TXP_MAX_BUF_NUM 6

    --
    2.33.0


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