mac80211: make use of regulatory tx power settings on change of tx power (d9d29257) · Commits · 戴 / test

We do not know what max power to allow until a device is targeting a channel, therefore only allow changing tx power if a channel is defined. Also make use of the channel's max power setting as defined by regulatory rules before allowing the user to use the requested power setting. If the user asked us to figure it out we use the max allowed by regulatory. Signed-off-by:

Luis R. Rodriguez <lrodriguez@atheros.com> Signed-off-by:

John W. Linville <linville@tuxdriver.com>

net/mac80211/wext.c

+6 −12

Original line number	Diff line number	Diff line
		@@ -656,6 +656,7 @@ static int ieee80211_ioctl_siwtxpower(struct net_device *dev,
		union iwreq_data data, char extra)
		{
		struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
		struct ieee80211_channel* chan = local->hw.conf.channel;
		u32 reconf_flags = 0;
		int new_power_level;

		@@ -663,20 +664,13 @@ static int ieee80211_ioctl_siwtxpower(struct net_device *dev,
		return -EINVAL;
		if (data->txpower.flags & IW_TXPOW_RANGE)
		return -EINVAL;

		if (data->txpower.fixed) {
		new_power_level = data->txpower.value;
		} else {
		/*
		* Automatic power level. Use maximum power for the current
		* channel. Should be part of rate control.
		*/
		struct ieee80211_channel* chan = local->hw.conf.channel;
		if (!chan)
		return -EINVAL;

		if (data->txpower.fixed)
		new_power_level = min(data->txpower.value, chan->max_power);
		else /* Automatic power level setting */
		new_power_level = chan->max_power;
		}

		if (local->hw.conf.power_level != new_power_level) {
		local->hw.conf.power_level = new_power_level;

Admin message