From 84540869678649074ae040bc9b063ef38ec9c83a Mon Sep 17 00:00:00 2001 From: "Luis R. Rodriguez" Date: Sat, 21 Feb 2009 00:20:40 -0500 Subject: [PATCH] ath9k: follow beacon hints on reg_notifier when world roaming If we are roaming we allow to follow beacon hints. Signed-off-by: Luis R. Rodriguez Signed-off-by: John W. Linville --- drivers/net/wireless/ath9k/regd.c | 93 ++++++++++++++++++++----------- 1 file changed, 61 insertions(+), 32 deletions(-) diff --git a/drivers/net/wireless/ath9k/regd.c b/drivers/net/wireless/ath9k/regd.c index eb0d1b754d20..f4595e248875 100644 --- a/drivers/net/wireless/ath9k/regd.c +++ b/drivers/net/wireless/ath9k/regd.c @@ -160,13 +160,18 @@ static bool ath9k_is_radar_freq(u16 center_freq) } /* - * Enable adhoc on 5 GHz if allowed by 11d. - * Remove passive scan if channel is allowed by 11d, - * except when on radar frequencies. + * N.B: These exception rules do not apply radar freqs. + * + * - We enable adhoc (or beaconing) if allowed by 11d + * - We enable active scan if the channel is allowed by 11d + * - If no country IE has been processed and a we determine we have + * received a beacon on a channel we can enable active scan and + * adhoc (or beaconing). */ -static void ath9k_reg_apply_5ghz_beaconing_flags(struct wiphy *wiphy, +static void ath9k_reg_apply_beaconing_flags(struct wiphy *wiphy, enum reg_set_by setby) { + enum ieee80211_band band; struct ieee80211_supported_band *sband; const struct ieee80211_reg_rule *reg_rule; struct ieee80211_channel *ch; @@ -174,29 +179,50 @@ static void ath9k_reg_apply_5ghz_beaconing_flags(struct wiphy *wiphy, u32 bandwidth = 0; int r; - if (setby != REGDOM_SET_BY_COUNTRY_IE) - return; - if (!wiphy->bands[IEEE80211_BAND_5GHZ]) - return; + for (band = 0; band < IEEE80211_NUM_BANDS; band++) { - sband = wiphy->bands[IEEE80211_BAND_5GHZ]; - for (i = 0; i < sband->n_channels; i++) { - ch = &sband->channels[i]; - r = freq_reg_info(wiphy, ch->center_freq, - &bandwidth, ®_rule); - if (r) + if (!wiphy->bands[band]) continue; - /* If 11d had a rule for this channel ensure we enable adhoc - * if it allows us to use it. Note that we would have disabled - * it by applying our static world regdomain by default during - * probe */ - if (!(reg_rule->flags & NL80211_RRF_NO_IBSS)) - ch->flags &= ~IEEE80211_CHAN_NO_IBSS; - if (!ath9k_is_radar_freq(ch->center_freq)) - continue; - if (!(reg_rule->flags & NL80211_RRF_PASSIVE_SCAN)) - ch->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; + + sband = wiphy->bands[band]; + + for (i = 0; i < sband->n_channels; i++) { + + ch = &sband->channels[i]; + + if (ath9k_is_radar_freq(ch->center_freq) || + (ch->flags & IEEE80211_CHAN_RADAR)) + continue; + + if (setby == REGDOM_SET_BY_COUNTRY_IE) { + r = freq_reg_info(wiphy, ch->center_freq, + &bandwidth, ®_rule); + if (r) + continue; + /* + * If 11d had a rule for this channel ensure + * we enable adhoc/beaconing if it allows us to + * use it. Note that we would have disabled it + * by applying our static world regdomain by + * default during init, prior to calling our + * regulatory_hint(). + */ + if (!(reg_rule->flags & + NL80211_RRF_NO_IBSS)) + ch->flags &= + ~IEEE80211_CHAN_NO_IBSS; + if (!(reg_rule->flags & + NL80211_RRF_PASSIVE_SCAN)) + ch->flags &= + ~IEEE80211_CHAN_PASSIVE_SCAN; + } else { + if (ch->beacon_found) + ch->flags &= ~(IEEE80211_CHAN_NO_IBSS | + IEEE80211_CHAN_PASSIVE_SCAN); + } + } } + } /* Allows active scan scan on Ch 12 and 13 */ @@ -209,11 +235,12 @@ static void ath9k_reg_apply_active_scan_flags(struct wiphy *wiphy, u32 bandwidth = 0; int r; - /* Force passive scan on Channels 12-13 */ sband = wiphy->bands[IEEE80211_BAND_2GHZ]; - /* If no country IE has been received always enable active scan - * on these channels */ + /* + * If no country IE has been received always enable active scan + * on these channels. This is only done for specific regulatory SKUs + */ if (setby != REGDOM_SET_BY_COUNTRY_IE) { ch = &sband->channels[11]; /* CH 12 */ if (ch->flags & IEEE80211_CHAN_PASSIVE_SCAN) @@ -224,10 +251,12 @@ static void ath9k_reg_apply_active_scan_flags(struct wiphy *wiphy, return; } - /* If a country IE has been recieved check its rule for this + /* + * If a country IE has been recieved check its rule for this * channel first before enabling active scan. The passive scan - * would have been enforced by the initial probe processing on - * our custom regulatory domain. */ + * would have been enforced by the initial processing of our + * custom regulatory domain. + */ ch = &sband->channels[11]; /* CH 12 */ r = freq_reg_info(wiphy, ch->center_freq, &bandwidth, ®_rule); @@ -290,10 +319,10 @@ void ath9k_reg_apply_world_flags(struct wiphy *wiphy, enum reg_set_by setby) case 0x63: case 0x66: case 0x67: - ath9k_reg_apply_5ghz_beaconing_flags(wiphy, setby); + ath9k_reg_apply_beaconing_flags(wiphy, setby); break; case 0x68: - ath9k_reg_apply_5ghz_beaconing_flags(wiphy, setby); + ath9k_reg_apply_beaconing_flags(wiphy, setby); ath9k_reg_apply_active_scan_flags(wiphy, setby); break; } -- 2.20.1