wireless: restrict to 32 legacy rates

Since the standards only define 12 legacy rates, 32 is certainly
a sane upper limit and we don't need to use u64 everywhere. Add
sanity checking that no more than 32 rates are registered and
change the variables to u32 throughout.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 3f559e3d0a7c..ede96c4fea2e 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -731,12 +731,12 @@ int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz)
         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;