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mac80211: make use of regulatory tx power settings on change of tx power

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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>
This commit is contained in:
Luis R. Rodriguez 2008-10-22 13:13:53 -07:00 committed by John W. Linville
parent e2ef12d3fd
commit d9d2925713
1 changed files with 6 additions and 12 deletions
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18
net/mac80211/wext.c
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@ -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 (!chan)
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;