From a48b13ac811ee236151d9e0e0dcb5639b2ab4591 Mon Sep 17 00:00:00 2001 From: Hong Wu Date: Wed, 11 Jan 2012 20:34:30 +0200 Subject: [PATCH] mac80211: Fix the maximum transmit power with power constraint The local maximum transmit power for a channel is defined as the maximum regulatory transmission power minus the local power constraint specified for the channel in the Power Constraint element. (7.3.2.15 IEEE80211 2007) Signed-off-by: Hong Wu Signed-off-by: John W. Linville --- net/mac80211/main.c | 3 ++- net/mac80211/mlme.c | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 0a0d94a..6192caa 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -155,7 +155,8 @@ int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) power = chan->max_power; else power = local->power_constr_level ? - (chan->max_power - local->power_constr_level) : + min(chan->max_power, + (chan->max_reg_power - local->power_constr_level)) : chan->max_power; if (local->user_power_level >= 0) diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index ecb4c84..95d3964 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -547,7 +547,7 @@ static void ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata, if (pwr_constr_elem_len != 1) return; - if ((*pwr_constr_elem <= conf->channel->max_power) && + if ((*pwr_constr_elem <= conf->channel->max_reg_power) && (*pwr_constr_elem != sdata->local->power_constr_level)) { sdata->local->power_constr_level = *pwr_constr_elem; ieee80211_hw_config(sdata->local, 0); -- 2.7.4