mac80211: minstrel_ht: move short preamble check out of get_rate

Test short preamble support in minstrel_ht_update_caps instead of
looking at the per-packet flag. Makes the code more efficient.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index ed8a34d..ae45dcb 100644 (file)
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -14,6 +14,7 @@
 #include <linux/ieee80211.h>
 #include <net/mac80211.h>
 #include "rate.h"
+#include "sta_info.h"
 #include "rc80211_minstrel.h"
 #include "rc80211_minstrel_ht.h"
 
@@ -1048,22 +1049,6 @@ minstrel_get_sample_rate(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
        return sample_idx;
 }
 
-static void
-minstrel_ht_check_cck_shortpreamble(struct minstrel_priv *mp,
-                                   struct minstrel_ht_sta *mi, bool val)
-{
-       u8 supported = mi->supported[MINSTREL_CCK_GROUP];
-
-       if (!supported || !mi->cck_supported_short)
-               return;
-
-       if (supported & (mi->cck_supported_short << (val * 4)))
-               return;
-
-       supported ^= mi->cck_supported_short | (mi->cck_supported_short << 4);
-       mi->supported[MINSTREL_CCK_GROUP] = supported;
-}
-
 static void
 minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
                      struct ieee80211_tx_rate_control *txrc)
@@ -1087,7 +1072,6 @@ minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
                minstrel_aggr_check(sta, txrc->skb);
 
        info->flags |= mi->tx_flags;
-       minstrel_ht_check_cck_shortpreamble(mp, mi, txrc->short_preamble);
 
 #ifdef CONFIG_MAC80211_DEBUGFS
        if (mp->fixed_rate_idx != -1)
@@ -1168,6 +1152,7 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband,
        struct ieee80211_mcs_info *mcs = &sta->ht_cap.mcs;
        u16 sta_cap = sta->ht_cap.cap;
        struct ieee80211_sta_vht_cap *vht_cap = &sta->vht_cap;
+       struct sta_info *sinfo = container_of(sta, struct sta_info, sta);
        int use_vht;
        int n_supported = 0;
        int ack_dur;
@@ -1293,6 +1278,9 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband,
        if (!n_supported)
                goto use_legacy;
 
+       if (test_sta_flag(sinfo, WLAN_STA_SHORT_PREAMBLE))
+               mi->cck_supported_short |= mi->cck_supported_short << 4;
+
        /* create an initial rate table with the lowest supported rates */
        minstrel_ht_update_stats(mp, mi);
        minstrel_ht_update_rates(mp, mi);