diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index 8bb6659..675a73a 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -3398,7 +3398,7 @@
 	return err;
 }
 
-static void b43_update_basic_rates(struct b43_wldev *dev, u64 brates)
+static void b43_update_basic_rates(struct b43_wldev *dev, u32 brates)
 {
 	struct ieee80211_supported_band *sband =
 		dev->wl->hw->wiphy->bands[b43_current_band(dev->wl)];
diff --git a/drivers/net/wireless/b43legacy/main.c b/drivers/net/wireless/b43legacy/main.c
index fb996c2..879edc7 100644
--- a/drivers/net/wireless/b43legacy/main.c
+++ b/drivers/net/wireless/b43legacy/main.c
@@ -2650,7 +2650,7 @@
 	return err;
 }
 
-static void b43legacy_update_basic_rates(struct b43legacy_wldev *dev, u64 brates)
+static void b43legacy_update_basic_rates(struct b43legacy_wldev *dev, u32 brates)
 {
 	struct ieee80211_supported_band *sband =
 		dev->wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ];
diff --git a/drivers/net/wireless/p54/p54.h b/drivers/net/wireless/p54/p54.h
index 64492fe..94c3acd 100644
--- a/drivers/net/wireless/p54/p54.h
+++ b/drivers/net/wireless/p54/p54.h
@@ -144,7 +144,7 @@
 	unsigned int output_power;
 	u32 tsf_low32;
 	u32 tsf_high32;
-	u64 basic_rate_mask;
+	u32 basic_rate_mask;
 	u16 wakeup_timer;
 	u16 aid;
 	struct ieee80211_tx_queue_stats tx_stats[8];
diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h
index cc56637..46918de 100644
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -396,7 +396,7 @@
 	int ack_timeout;
 	int ack_consume_time;
 
-	u64 basic_rates;
+	u32 basic_rates;
 
 	int slot_time;
 
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index ef42559..c764840 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -207,7 +207,7 @@
 	u16 beacon_int;
 	u16 assoc_capability;
 	u64 timestamp;
-	u64 basic_rates;
+	u32 basic_rates;
 	struct ieee80211_bss_ht_conf ht;
 };
 
@@ -761,7 +761,7 @@
  *	sizeof(void *), size is determined in hw information.
  */
 struct ieee80211_sta {
-	u64 supp_rates[IEEE80211_NUM_BANDS];
+	u32 supp_rates[IEEE80211_NUM_BANDS];
 	u8 addr[ETH_ALEN];
 	u16 aid;
 	struct ieee80211_sta_ht_cap ht_cap;
diff --git a/include/net/wireless.h b/include/net/wireless.h
index 9e73aae..6c5b082 100644
--- a/include/net/wireless.h
+++ b/include/net/wireless.h
@@ -367,7 +367,7 @@
  */
 struct ieee80211_rate *
 ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
-			    u64 basic_rates, int bitrate);
+			    u32 basic_rates, int bitrate);
 
 /**
  * regulatory_hint - driver hint to the wireless core a regulatory domain
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index a8c7274..70366ef 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -909,11 +909,11 @@
 void ieee80211_sta_req_auth(struct ieee80211_sub_if_data *sdata,
 			    struct ieee80211_if_sta *ifsta);
 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
-					u8 *bssid, u8 *addr, u64 supp_rates);
+					u8 *bssid, u8 *addr, u32 supp_rates);
 int ieee80211_sta_deauthenticate(struct ieee80211_sub_if_data *sdata, u16 reason);
 int ieee80211_sta_disassociate(struct ieee80211_sub_if_data *sdata, u16 reason);
 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
-u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
+u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
 			    struct ieee802_11_elems *elems,
 			    enum ieee80211_band band);
 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
@@ -1026,7 +1026,7 @@
 void ieee802_11_parse_elems(u8 *start, size_t len,
 			    struct ieee802_11_elems *elems);
 int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freq);
-u64 ieee80211_mandatory_rates(struct ieee80211_local *local,
+u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
 			      enum ieee80211_band band);
 
 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index 82f568e..2d573f8 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -476,7 +476,7 @@
 	struct ieee80211_local *local = sdata->local;
 	struct ieee802_11_elems elems;
 	struct ieee80211_channel *channel;
-	u64 supp_rates = 0;
+	u32 supp_rates = 0;
 	size_t baselen;
 	int freq;
 	enum ieee80211_band band = rx_status->band;
diff --git a/net/mac80211/mesh.h b/net/mac80211/mesh.h
index f1196f5..9e064ee 100644
--- a/net/mac80211/mesh.h
+++ b/net/mac80211/mesh.h
@@ -236,7 +236,7 @@
 		struct ieee80211_mgmt *mgmt, size_t len);
 int mesh_path_add(u8 *dst, struct ieee80211_sub_if_data *sdata);
 /* Mesh plinks */
-void mesh_neighbour_update(u8 *hw_addr, u64 rates,
+void mesh_neighbour_update(u8 *hw_addr, u32 rates,
 		struct ieee80211_sub_if_data *sdata, bool add);
 bool mesh_peer_accepts_plinks(struct ieee802_11_elems *ie);
 void mesh_accept_plinks_update(struct ieee80211_sub_if_data *sdata);
diff --git a/net/mac80211/mesh_plink.c b/net/mac80211/mesh_plink.c
index c140a1b..a8bbdec 100644
--- a/net/mac80211/mesh_plink.c
+++ b/net/mac80211/mesh_plink.c
@@ -93,7 +93,7 @@
  *       on it in the lifecycle management section!
  */
 static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata,
-					 u8 *hw_addr, u64 rates)
+					 u8 *hw_addr, u32 rates)
 {
 	struct ieee80211_local *local = sdata->local;
 	struct sta_info *sta;
@@ -222,7 +222,7 @@
 	return 0;
 }
 
-void mesh_neighbour_update(u8 *hw_addr, u64 rates, struct ieee80211_sub_if_data *sdata,
+void mesh_neighbour_update(u8 *hw_addr, u32 rates, struct ieee80211_sub_if_data *sdata,
 			   bool peer_accepting_plinks)
 {
 	struct ieee80211_local *local = sdata->local;
@@ -447,7 +447,7 @@
 		spin_lock_bh(&sta->lock);
 	} else if (!sta) {
 		/* ftype == PLINK_OPEN */
-		u64 rates;
+		u32 rates;
 		if (!mesh_plink_free_count(sdata)) {
 			mpl_dbg("Mesh plink error: no more free plinks\n");
 			rcu_read_unlock();
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index b9e4b93..9852da5 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -73,7 +73,7 @@
 
 static int ieee80211_compatible_rates(struct ieee80211_bss *bss,
 				      struct ieee80211_supported_band *sband,
-				      u64 *rates)
+				      u32 *rates)
 {
 	int i, j, count;
 	*rates = 0;
@@ -93,14 +93,14 @@
 }
 
 /* also used by mesh code */
-u64 ieee80211_sta_get_rates(struct ieee80211_local *local,
+u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
 			    struct ieee802_11_elems *elems,
 			    enum ieee80211_band band)
 {
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_rate *bitrates;
 	size_t num_rates;
-	u64 supp_rates;
+	u32 supp_rates;
 	int i, j;
 	sband = local->hw.wiphy->bands[band];
 
@@ -253,7 +253,7 @@
 	struct ieee80211_bss *bss;
 	int wmm = 0;
 	struct ieee80211_supported_band *sband;
-	u64 rates = 0;
+	u32 rates = 0;
 	size_t e_ies_len;
 
 	if (ifsta->flags & IEEE80211_STA_PREV_BSSID_SET) {
@@ -1282,7 +1282,7 @@
 	struct ieee80211_local *local = sdata->local;
 	struct ieee80211_supported_band *sband;
 	struct sta_info *sta;
-	u64 rates, basic_rates;
+	u32 rates, basic_rates;
 	u16 capab_info, status_code, aid;
 	struct ieee802_11_elems elems;
 	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
@@ -1639,7 +1639,7 @@
 	struct sta_info *sta;
 	struct ieee80211_channel *channel;
 	u64 beacon_timestamp, rx_timestamp;
-	u64 supp_rates = 0;
+	u32 supp_rates = 0;
 	enum ieee80211_band band = rx_status->band;
 
 	if (elems->ds_params && elems->ds_params_len == 1)
@@ -1660,7 +1660,7 @@
 
 		sta = sta_info_get(local, mgmt->sa);
 		if (sta) {
-			u64 prev_rates;
+			u32 prev_rates;
 
 			prev_rates = sta->sta.supp_rates[band];
 			/* make sure mandatory rates are always added */
@@ -2526,7 +2526,7 @@
  * must be callable in atomic context.
  */
 struct sta_info *ieee80211_ibss_add_sta(struct ieee80211_sub_if_data *sdata,
-					u8 *bssid,u8 *addr, u64 supp_rates)
+					u8 *bssid,u8 *addr, u32 supp_rates)
 {
 	struct ieee80211_local *local = sdata->local;
 	struct sta_info *sta;
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 3f559e3d..ede96c4 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -731,12 +731,12 @@
 	return ret;
 }
 
-u64 ieee80211_mandatory_rates(struct ieee80211_local *local,
+u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
 			      enum ieee80211_band band)
 {
 	struct ieee80211_supported_band *sband;
 	struct ieee80211_rate *bitrates;
-	u64 mandatory_rates;
+	u32 mandatory_rates;
 	enum ieee80211_rate_flags mandatory_flag;
 	int i;
 
diff --git a/net/wireless/core.c b/net/wireless/core.c
index b96fc0c..1252264 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -273,10 +273,16 @@
 
 		sband->band = band;
 
-		if (!sband->n_channels || !sband->n_bitrates) {
-			WARN_ON(1);
+		if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
 			return -EINVAL;
-		}
+
+		/*
+		 * Since we use a u32 for rate bitmaps in
+		 * ieee80211_get_response_rate, we cannot
+		 * have more than 32 legacy rates.
+		 */
+		if (WARN_ON(sband->n_bitrates > 32))
+			return -EINVAL;
 
 		for (i = 0; i < sband->n_channels; i++) {
 			sband->channels[i].orig_flags =
diff --git a/net/wireless/util.c b/net/wireless/util.c
index e76cc28..487cdd9 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -9,7 +9,7 @@
 
 struct ieee80211_rate *
 ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
-			    u64 basic_rates, int bitrate)
+			    u32 basic_rates, int bitrate)
 {
 	struct ieee80211_rate *result = &sband->bitrates[0];
 	int i;