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Re: [PATCH 2/3] cfg80211: implement multi-vif interface combination validation

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On Mon, 2014-01-20 at 15:09 +0100, Michal Kazior wrote:

> +		/* sanity check - make sure all wdevs in params[] are unique */
> +		for (j = 0; j < num_params; j++)
> +			if (WARN_ON(i != j && params[i].wdev == params[j].wdev))
> +				return -EINVAL;
> +
> +		if (params[i].wdev && params[i].wdev->wiphy != &rdev->wiphy)
> +			return -EINVAL;

How could you ever have a param without a wdev? That seems like a bug as
well?

> +		used_iftypes |= BIT(params[i].iftype);
> +		num[params[i].iftype]++;
> +
> +		err = cfg80211_is_radar_required(params[i].iftype,
> +						 params[i].chan,
> +						 params[i].chanmode,
> +						 params[i].radar_detect_width);
> +		if (err < 0)
> +			return err;
> +		else if (err && !params[i].radar_detect_width)
> +			return -EINVAL;

That's a bit confusing - why do you pass the radar_detect_width in, and
then check it again? Couldn't you just do all the checks in the
function, perhaps renamed a bit?

johannes

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