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-rw-r--r--net/mac80211/util.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index a7968df9dac..d6aca91e612 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -640,3 +640,31 @@ int ieee80211_set_freq(struct ieee80211_sub_if_data *sdata, int freqMHz)
return ret;
}
+
+u64 ieee80211_mandatory_rates(struct ieee80211_local *local,
+ enum ieee80211_band band)
+{
+ struct ieee80211_supported_band *sband;
+ struct ieee80211_rate *bitrates;
+ u64 mandatory_rates;
+ enum ieee80211_rate_flags mandatory_flag;
+ int i;
+
+ sband = local->hw.wiphy->bands[band];
+ if (!sband) {
+ WARN_ON(1);
+ sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
+ }
+
+ if (band == IEEE80211_BAND_2GHZ)
+ mandatory_flag = IEEE80211_RATE_MANDATORY_B;
+ else
+ mandatory_flag = IEEE80211_RATE_MANDATORY_A;
+
+ bitrates = sband->bitrates;
+ mandatory_rates = 0;
+ for (i = 0; i < sband->n_bitrates; i++)
+ if (bitrates[i].flags & mandatory_flag)
+ mandatory_rates |= BIT(i);
+ return mandatory_rates;
+}