Re: [PATCH v8] wifi: mt76: mt7915: add wds support when wed is enabled

[Shengyu Qu]

Hi,

Thanks for reply. I'll change the code in next version.

Best regards,
Shengyu

在 2025/3/6 10:27, Ping-Ke Shih 写道:
> Shengyu Qu <wiagn233@xxxxxxxxxxx> wrote:
>
> [...]
>
> > @@ -1271,6 +1278,10 @@ static void mt7915_sta_set_4addr(struct ieee80211_hw *hw,
> >   {
> >          struct mt7915_dev *dev = mt7915_hw_dev(hw);
> >          struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
> > +       int min = MT76_WED_WDS_MIN, max = MT76_WED_WDS_MAX;
> > +       struct ieee80211_sta *pre_sta;
> > +       u8 flags = MT76_WED_DEFAULT;
> > +       int temp_idx;
>
> In general 'temp' is short for temperature. 'tmp' is preferred.
>
> >          if (enabled)
> >                  set_bit(MT_WCID_FLAG_4ADDR, &msta->wcid.flags);
> > @@ -1280,6 +1291,30 @@ static void mt7915_sta_set_4addr(struct ieee80211_hw *hw,
> >          if (!msta->wcid.sta)
> >                  return;
> >
> > +       if (mtk_wed_device_active(&dev->mt76.mmio.wed) &&
> > +           !is_mt7915(&dev->mt76) &&
> > +           (msta->wcid.idx < min || msta->wcid.idx > max - 1)) {
> > +               pre_sta = kzalloc(sizeof(*sta) + sizeof(*msta), GFP_KERNEL);
> > +               memmove(pre_sta, sta, sizeof(*sta) + sizeof(*msta));
>
> Seemingly, kmemdup() = kzalloc() + memmove().
>
> > +
> > +               flags = test_bit(MT_WCID_FLAG_4ADDR, &msta->wcid.flags) ?
> > +                       MT76_WED_WDS_ACTIVE : MT76_WED_ACTIVE;
> > +
> > +               temp_idx = __mt76_wcid_alloc(dev->mt76.wcid_mask, MT7915_WTBL_STA, flags);
>
> Since __mt76_wcid_alloc() could return -1 for error case, shouldn't you handle that?
>
> > +               ((struct mt7915_sta *)pre_sta->drv_priv)->wcid.idx = (u16)temp_idx;
>
> Define a local `struct mt7915_sta *pre_msta = (struct mt7915_sta *)pre_sta->drv_priv`
> ahead. This statement would be simpler. Just `pre_msta-> wcid.idx = (u16)temp_idx`,
> but casting of '(u16)' is still not very preferred.
>
> > +               mt7915_mac_sta_add(&dev->mt76, vif, pre_sta);
> > +               rcu_assign_pointer(dev->mt76.wcid[temp_idx], &msta->wcid);
> > +
> > +               temp_idx = msta->wcid.idx;
> > +               msta->wcid.idx = ((struct mt7915_sta *)pre_sta->drv_priv)->wcid.idx;
> > +               ((struct mt7915_sta *)pre_sta->drv_priv)->wcid.idx = (u16)temp_idx;
> > +               rcu_assign_pointer(dev->mt76.wcid[temp_idx], NULL);
> > +
> > +               synchronize_rcu();
> > +               mt7915_mac_sta_remove(&dev->mt76, vif, pre_sta);
> > +               kfree(pre_sta);
> > +       }
> > +
> >          mt76_connac_mcu_wtbl_update_hdr_trans(&dev->mt76, vif, sta);
> >   }
>
> [...]

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