Re: [PATCH v2 03/12] wifi: ath12k: modify ath12k mac start/stop ops for single wiphy

[Kalle Valo <kvalo@kernel.org>]

Rameshkumar Sundaram <quic_ramess@quicinc.com> writes:

> From: Sriram R <quic_srirrama@quicinc.com>
>
> When mac80211 does drv start/stop, apply the state change
> for all the radios within the wiphy in ath12k.
>
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
>
> Signed-off-by: Sriram R <quic_srirrama@quicinc.com>
> Signed-off-by: Rameshkumar Sundaram <quic_ramess@quicinc.com>

I haven't reviewed the patchset fully yet, first quick impressions:

> +static void ath12k_drain_tx(struct ath12k_hw *ah)
> +{
> +	int i;
> +	struct ath12k *ar;

We usually try to have reverse xmas style, of course not always possible
but here it is.

> +	ar = ah->radio;
> +
> +	for (i = 0; i < ah->num_radio; i++) {
> +		ath12k_mac_drain_tx(ar);
> +		ar++;
> +	}
> +}

Please avoid pointer arithmetic (in this case 'ar++') as much as
possible, it's just so easy to shoot yourself in the foot. In patch 1
you add ath12k_ah_to_ar(), why not use it?

And I see this pattern quite a lot, should we have
ath12k_for_each_radio() or something like that? Or did I see that macro
in some patch already?

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