[PATCH 11/16] PR: Use preferred frequency for channel selection in PASN ranging

[Jouni Malinen]

On Mon, Jul 13, 2026 at 11:59:59AM +0530, Peddolla Harshavardhan Reddy wrote:
> diff --git a/src/common/proximity_ranging.c b/src/common/proximity_ranging.c
> +static bool pr_get_preferred_channel(int preferred_freq,
> +				     const struct pr_channels *common_chan,
> +				     u8 *op_class, u8 *op_channel)

> +	/* Resolve freq to a base channel number via the 20 MHz op_class */
> +	hw_mode = ieee80211_freq_to_channel_ext(preferred_freq, 0, 0,
> +						&base_op_class, &channel);

This channel number is specific to a single operating class (that
base_op_class).

> +
> +	/* Among all op_classes in common_chan that contain this channel,
> +	 * pick the one with the highest bandwidth.
> +	 */
> +	for (i = 0; i < common_chan->op_classes; i++) {
> +		for (j = 0; j < common_chan->op_class[i].channels; j++) {
> +			if (common_chan->op_class[i].channel[j] != channel)
> +				continue;

But this is comparing that operating class specific channel number to a
channel number in another operating class.

> +	*op_class = best_op_class;
> +	*op_channel = channel;

And this is returning the channel number that might not match the
channel in another operating class when base_op_class != best_op_class.

Maybe this should compare frequencies instead? Or some kind of range
comparison that would accept all matching channels that include the
preferred_freq.

-- 
Jouni Malinen                                            PGP id EFC895FA