Re: [PATCH V8 1/3] ath11k: switch to using ieee80211_tx_status_ext()

[Karthikeyan periyasamy <periyasa@codeaurora.org>]

> -	ieee80211_tx_status(ar->hw, msdu);
> +	spin_lock_bh(&ab->base_lock);
> +	peer = ath11k_peer_find_by_id(ab, ts->peer_id);
> +	if (peer) {
> +		arsta = (struct ath11k_sta *)peer->sta->drv_priv;
> +		status.sta = peer->sta;
> +		status.skb = msdu;
> +		status.info = info;
> +		status.rate = &arsta->last_txrate;

Assigning arsta holded last_txrate pointer to status.rate create race 
condition problem b/w sta delete and ieee80211_tx_status_ext, no ?
Hw we ensure that arsta pointer is valid until ieee80211_tx_status_ext() 
processing?

Instead why don't we have local struct rate_info and assign like below 
code snippet

         struct rate_info rate;
...
         rate = arsta->last_txrate;
         status.rate = &rate;

Thanks,
Karthikeyan P