Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...

[safe/jmp/linux-2.6] / net / wireless / reg.c

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 9fea910..537af62 100644 (file)
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -906,6 +906,7 @@ EXPORT_SYMBOL(freq_reg_info);
 int freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 *bandwidth,
                         const struct ieee80211_reg_rule **reg_rule)
 {
+       assert_cfg80211_lock();
        return freq_reg_info_regd(wiphy, center_freq,
                bandwidth, reg_rule, NULL);
 }
@@ -1134,7 +1135,8 @@ static bool reg_is_world_roaming(struct wiphy *wiphy)
        if (is_world_regdom(cfg80211_regdomain->alpha2) ||
            (wiphy->regd && is_world_regdom(wiphy->regd->alpha2)))
                return true;
-       if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
+       if (last_request &&
+           last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
            wiphy->custom_regulatory)
                return true;
        return false;
@@ -1143,6 +1145,12 @@ static bool reg_is_world_roaming(struct wiphy *wiphy)
 /* Reap the advantages of previously found beacons */
 static void reg_process_beacons(struct wiphy *wiphy)
 {
+       /*
+        * Means we are just firing up cfg80211, so no beacons would
+        * have been processed yet.
+        */
+       if (!last_request)
+               return;
        if (!reg_is_world_roaming(wiphy))
                return;
        wiphy_update_beacon_reg(wiphy);
@@ -1177,6 +1185,8 @@ static void handle_channel_custom(struct wiphy *wiphy,
        struct ieee80211_supported_band *sband;
        struct ieee80211_channel *chan;
 
+       assert_cfg80211_lock();
+
        sband = wiphy->bands[band];
        BUG_ON(chan_idx >= sband->n_channels);
        chan = &sband->channels[chan_idx];
@@ -1215,10 +1225,13 @@ void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
                                   const struct ieee80211_regdomain *regd)
 {
        enum ieee80211_band band;
+
+       mutex_lock(&cfg80211_mutex);
        for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
                if (wiphy->bands[band])
                        handle_band_custom(wiphy, band, regd);
        }
+       mutex_unlock(&cfg80211_mutex);
 }
 EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
 
@@ -1424,7 +1437,7 @@ new_request:
        return call_crda(last_request->alpha2);
 }
 
-/* This currently only processes user and driver regulatory hints */
+/* This processes *all* regulatory hints */
 static void reg_process_hint(struct regulatory_request *reg_request)
 {
        int r = 0;