--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
-@@ -2081,6 +2081,7 @@ struct cfg80211_update_ft_ies_params {
+@@ -2207,6 +2207,7 @@ struct cfg80211_qos_map {
* (as advertised by the nl80211 feature flag.)
* @get_tx_power: store the current TX power into the dbm variable;
* return 0 if successful
*
* @set_wds_peer: set the WDS peer for a WDS interface
*
-@@ -2303,6 +2304,7 @@ struct cfg80211_ops {
+@@ -2431,6 +2432,7 @@ struct cfg80211_ops {
enum nl80211_tx_power_setting type, int mbm);
int (*get_tx_power)(struct wiphy *wiphy, struct wireless_dev *wdev,
int *dbm);
const u8 *addr);
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
-@@ -1029,6 +1029,7 @@ enum ieee80211_smps_mode {
+@@ -1032,6 +1032,7 @@ enum ieee80211_smps_mode {
*
* @power_level: requested transmit power (in dBm), backward compatibility
* value only that is set to the minimum of all interfaces
*
* @chandef: the channel definition to tune to
* @radar_enabled: whether radar detection is enabled
-@@ -1050,6 +1051,7 @@ struct ieee80211_conf {
+@@ -1053,6 +1054,7 @@ struct ieee80211_conf {
u32 flags;
int power_level, dynamic_ps_timeout;
int max_sleep_period;
u8 ps_dtim_period;
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
-@@ -1514,6 +1514,9 @@ enum nl80211_commands {
- * @NL80211_ATTR_SUPPORT_10_MHZ: A flag indicating that the device supports
- * 10 MHz channel bandwidth.
+@@ -1591,6 +1591,9 @@ enum nl80211_commands {
+ * creation then the new interface will be owned by the netlink socket
+ * that created it and will be destroyed when the socket is closed
*
+ * @NL80211_ATTR_WIPHY_ANTENNA_GAIN: Configured antenna gain. Used to reduce
+ * transmit power to stay within regulatory limits. u32, dBi.
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
*/
-@@ -1833,6 +1836,8 @@ enum nl80211_attrs {
- NL80211_ATTR_SUPPORT_5_MHZ,
- NL80211_ATTR_SUPPORT_10_MHZ,
+@@ -1931,6 +1934,8 @@ enum nl80211_attrs {
+ NL80211_ATTR_CSA_C_OFFSETS_TX,
+ NL80211_ATTR_MAX_CSA_COUNTERS,
+ NL80211_ATTR_WIPHY_ANTENNA_GAIN,
+
__NL80211_ATTR_AFTER_LAST,
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
-@@ -2308,6 +2308,19 @@ static int ieee80211_get_tx_power(struct
+@@ -2094,6 +2094,19 @@ static int ieee80211_get_tx_power(struct
return 0;
}
static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,
const u8 *addr)
{
-@@ -3861,6 +3874,7 @@ struct cfg80211_ops mac80211_config_ops
+@@ -3517,6 +3530,7 @@ const struct cfg80211_ops mac80211_confi
.set_wiphy_params = ieee80211_set_wiphy_params,
.set_tx_power = ieee80211_set_tx_power,
.get_tx_power = ieee80211_get_tx_power,
CFG80211_TESTMODE_CMD(ieee80211_testmode_cmd)
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
-@@ -1185,6 +1185,7 @@ struct ieee80211_local {
+@@ -1243,6 +1243,7 @@ struct ieee80211_local {
int dynamic_ps_forced_timeout;
int user_power_level; /* in dBm, for all interfaces */
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
-@@ -101,7 +101,7 @@ static u32 ieee80211_hw_conf_chan(struct
+@@ -97,7 +97,7 @@ static u32 ieee80211_hw_conf_chan(struct
struct ieee80211_sub_if_data *sdata;
struct cfg80211_chan_def chandef = {};
u32 changed = 0;
- int power;
-+ int power, ant_gain, max_power;
++ int power, max_power;
u32 offchannel_flag;
offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
-@@ -156,8 +156,21 @@ static u32 ieee80211_hw_conf_chan(struct
+@@ -154,6 +154,12 @@ static u32 ieee80211_hw_conf_chan(struct
}
rcu_read_unlock();
-- if (local->hw.conf.power_level != power) {
+ max_power = chandef.chan->max_reg_power;
-+ ant_gain = chandef.chan->max_antenna_gain;
+ if (local->user_antenna_gain > 0) {
-+ if (local->user_antenna_gain > ant_gain) {
-+ max_power -= local->user_antenna_gain - ant_gain;
-+ ant_gain = 0;
-+ } else
-+ ant_gain -= local->user_antenna_gain;
++ max_power -= local->user_antenna_gain;
+ power = min(power, max_power);
+ }
+
-+ if (local->hw.conf.power_level != power ||
-+ local->hw.conf.max_antenna_gain != ant_gain) {
+ if (local->hw.conf.power_level != power) {
changed |= IEEE80211_CONF_CHANGE_POWER;
-+ local->hw.conf.max_antenna_gain = ant_gain;
local->hw.cur_power_level = power;
- local->hw.conf.power_level = power;
- }
-@@ -588,6 +601,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(
+@@ -584,6 +590,7 @@ struct ieee80211_hw *ieee80211_alloc_hw(
IEEE80211_RADIOTAP_MCS_HAVE_BW;
local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
-@@ -357,6 +357,7 @@ static const struct nla_policy nl80211_p
- [NL80211_ATTR_STA_SUPPORTED_CHANNELS] = { .type = NLA_BINARY },
- [NL80211_ATTR_STA_SUPPORTED_OPER_CLASSES] = { .type = NLA_BINARY },
- [NL80211_ATTR_HANDLE_DFS] = { .type = NLA_FLAG },
+@@ -387,6 +387,7 @@ static const struct nla_policy nl80211_p
+ [NL80211_ATTR_TDLS_PEER_CAPABILITY] = { .type = NLA_U32 },
+ [NL80211_ATTR_IFACE_SOCKET_OWNER] = { .type = NLA_FLAG },
+ [NL80211_ATTR_CSA_C_OFFSETS_TX] = { .type = NLA_BINARY },
+ [NL80211_ATTR_WIPHY_ANTENNA_GAIN] = { .type = NLA_U32 },
};
/* policy for the key attributes */
-@@ -2039,6 +2040,22 @@ static int nl80211_set_wiphy(struct sk_b
- goto bad_res;
+@@ -2162,6 +2163,20 @@ static int nl80211_set_wiphy(struct sk_b
+ return result;
}
+ if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_GAIN]) {
+ int idx, dbi = 0;
+
-+ if (!rdev->ops->set_antenna_gain) {
-+ result = -EOPNOTSUPP;
-+ goto bad_res;
-+ }
++ if (!rdev->ops->set_antenna_gain)
++ return -EOPNOTSUPP;
+
+ idx = NL80211_ATTR_WIPHY_ANTENNA_GAIN;
+ dbi = nla_get_u32(info->attrs[idx]);
+
+ result = rdev->ops->set_antenna_gain(&rdev->wiphy, dbi);
+ if (result)
-+ goto bad_res;
++ return result;
+ }
+
if (info->attrs[NL80211_ATTR_WIPHY_ANTENNA_TX] &&