Re: [PATCH v2 2/2] wifi: ath12k: Introduce the container for mac80211 hw

[Kalle Valo <kvalo@kernel.org>]

Karthikeyan Periyasamy <quic_periyasa@quicinc.com> writes:

> To support multi link operation, we need to combine all the link/pdev
> under a single wiphy. This avoids the overhead of synchronization
> across multiple hardware instances in both the cfg80211 and mac80211
> layers. Currently, each link/pdev is registered as separate wiphy,
> tightly coupled with link/pdev/radio (ar) structure. To enable single
> wiphy registration within the chip, we decouple the wiphy data entity from
> the link/pdev/radio (ar) structure and move it under the chip (ab)
> structure with a new data container (ath12k_hw) structure. This approach
> improves scalability for future multi link operation support.

What about struct ath12k_pdev? Do we need it still or should it be removed?

>  static void ath12k_mac_op_cancel_hw_scan(struct ieee80211_hw *hw,
>  					 struct ieee80211_vif *vif)
>  {
> -	struct ath12k *ar = hw->priv;
> +	struct ath12k_hw *ah = ath12k_hw_to_ah(hw);
> +	struct ath12k *ar;
> +
> +	mutex_lock(&ah->conf_mutex);
> +
> +	ar = ath12k_ah_to_ar(ah);
>  
>  	mutex_lock(&ar->conf_mutex);
>  	ath12k_scan_abort(ar);
>  	mutex_unlock(&ar->conf_mutex);
>  
> +	mutex_unlock(&ah->conf_mutex);
> +
>  	cancel_delayed_work_sync(&ar->scan.timeout);
>  }

Do we really need two mutexes? I don't see any analysis about that. And
even if we do, I feel that it should be added in a separate patch.

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