mac80211: Accept auto txpower setting
This changes the SIWTXPOWER ioctl to also accept a txpower setting of
"automatic". Since mac80211 currently cannot tell drivers to automatically
adjust tx power, we select the tx power level of the current channel. While
this is kind of a hack, it certainly saves some iwconfig users from headaches.
Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/mac80211/ieee80211_ioctl.c b/net/mac80211/ieee80211_ioctl.c
index 308bbe4..da3350d 100644
--- a/net/mac80211/ieee80211_ioctl.c
+++ b/net/mac80211/ieee80211_ioctl.c
@@ -634,22 +634,35 @@
{
struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
bool need_reconfig = 0;
+ u8 new_power_level;
if ((data->txpower.flags & IW_TXPOW_TYPE) != IW_TXPOW_DBM)
return -EINVAL;
if (data->txpower.flags & IW_TXPOW_RANGE)
return -EINVAL;
- if (!data->txpower.fixed)
- return -EINVAL;
- if (local->hw.conf.power_level != data->txpower.value) {
- local->hw.conf.power_level = data->txpower.value;
+ if (data->txpower.fixed) {
+ new_power_level = data->txpower.value;
+ } else {
+ /* Automatic power level. Get the px power from the current
+ * channel. */
+ struct ieee80211_channel* chan = local->oper_channel;
+ if (!chan)
+ return -EINVAL;
+
+ new_power_level = chan->power_level;
+ }
+
+ if (local->hw.conf.power_level != new_power_level) {
+ local->hw.conf.power_level = new_power_level;
need_reconfig = 1;
}
+
if (local->hw.conf.radio_enabled != !(data->txpower.disabled)) {
local->hw.conf.radio_enabled = !(data->txpower.disabled);
need_reconfig = 1;
}
+
if (need_reconfig) {
ieee80211_hw_config(local);
/* The return value of hw_config is not of big interest here,