> Reject twt flows with the same parameters to prevent some potential issues
> causing by duplicated establishment.
>
> Reviewed-by: Ryder Lee <ryder.lee@xxxxxxxxxxxx>
> Reviewed-by: Shayne Chen <shayne.chen@xxxxxxxxxxxx>
> Signed-off-by: Peter Chiu <chui-hao.chiu@xxxxxxxxxxxx>
> ---
> .../net/wireless/mediatek/mt76/mt7915/mac.c | 31 +++++++++++++++++++
> 1 file changed, 31 insertions(+)
>
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
> index 94a1871fbf43..ff60a3d2d26d 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
> @@ -2601,6 +2601,34 @@ static int mt7915_mac_check_twt_req(struct ieee80211_twt_setup *twt)
> return 0;
> }
>
> +static inline bool
> +mt7915_mac_twt_param_equal(struct mt7915_sta *msta,
> + struct ieee80211_twt_params *twt_agrt)
nit: please do not use inline in .c files.
Regards,
Lorenzo
> +{
> + u16 type = le16_to_cpu(twt_agrt->req_type);
> + u8 exp;
> + int i;
> +
> + exp = FIELD_GET(IEEE80211_TWT_REQTYPE_WAKE_INT_EXP, type);
> + for (i = 0; i < MT7915_MAX_STA_TWT_AGRT; i++) {
> + struct mt7915_twt_flow *f;
> +
> + if (!(msta->twt.flowid_mask & BIT(i)))
> + continue;
> +
> + f = &msta->twt.flow[i];
> + if (f->duration == twt_agrt->min_twt_dur &&
> + f->mantissa == twt_agrt->mantissa &&
> + f->exp == exp &&
> + f->protection == !!(type & IEEE80211_TWT_REQTYPE_PROTECTION) &&
> + f->flowtype == !!(type & IEEE80211_TWT_REQTYPE_FLOWTYPE) &&
> + f->trigger == !!(type & IEEE80211_TWT_REQTYPE_TRIGGER))
> + return true;
> + }
> +
> + return false;
> +}
> +
> void mt7915_mac_add_twt_setup(struct ieee80211_hw *hw,
> struct ieee80211_sta *sta,
> struct ieee80211_twt_setup *twt)
> @@ -2634,6 +2662,9 @@ void mt7915_mac_add_twt_setup(struct ieee80211_hw *hw,
> exp = FIELD_GET(IEEE80211_TWT_REQTYPE_WAKE_INT_EXP, req_type);
> sta_setup_cmd = FIELD_GET(IEEE80211_TWT_REQTYPE_SETUP_CMD, req_type);
>
> + if (mt7915_mac_twt_param_equal(msta, twt_agrt))
> + goto unlock;
> +
> flow = &msta->twt.flow[flowid];
> memset(flow, 0, sizeof(*flow));
> INIT_LIST_HEAD(&flow->list);
> --
> 2.18.0
>
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