5 files changed, 27 insertions, 31 deletions

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 1fd8cb26b3f..8cc4bc10140 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1404,7 +1404,7 @@ static inline int __ieee80211_resume(struct ieee80211_hw *hw)
 extern void *mac80211_wiphy_privid; /* for wiphy privid */
 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
                         enum nl80211_iftype type);
-int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
+int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
                              int rate, int erp, int short_preamble);
 void mac80211_ev_michael_mic_failure(struct ieee80211_sub_if_data *sdata, int keyidx,
                                      struct ieee80211_hdr *hdr, const u8 *tsc,
diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
index b39dda523f3..79633ae06fd 100644
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -334,14 +334,15 @@ minstrel_get_rate(void *priv, struct ieee80211_sta *sta,
 
 
 static void
-calc_rate_durations(struct ieee80211_local *local, struct minstrel_rate *d,
+calc_rate_durations(enum ieee80211_band band,
+                    struct minstrel_rate *d,
                     struct ieee80211_rate *rate)
 {
         int erp = !!(rate->flags & IEEE80211_RATE_ERP_G);
 
-        d->perfect_tx_time = ieee80211_frame_duration(local, 1200,
+        d->perfect_tx_time = ieee80211_frame_duration(band, 1200,
                         rate->bitrate, erp, 1);
-        d->ack_time = ieee80211_frame_duration(local, 10,
+        d->ack_time = ieee80211_frame_duration(band, 10,
                         rate->bitrate, erp, 1);
 }
 
@@ -379,14 +380,14 @@ minstrel_rate_init(void *priv, struct ieee80211_supported_band *sband,
 {
         struct minstrel_sta_info *mi = priv_sta;
         struct minstrel_priv *mp = priv;
-        struct ieee80211_local *local = hw_to_local(mp->hw);
         struct ieee80211_rate *ctl_rate;
         unsigned int i, n = 0;
         unsigned int t_slot = 9; /* FIXME: get real slot time */
 
         mi->lowest_rix = rate_lowest_index(sband, sta);
         ctl_rate = &sband->bitrates[mi->lowest_rix];
-        mi->sp_ack_dur = ieee80211_frame_duration(local, 10, ctl_rate->bitrate,
+        mi->sp_ack_dur = ieee80211_frame_duration(sband->band, 10,
+                                ctl_rate->bitrate,
                                 !!(ctl_rate->flags & IEEE80211_RATE_ERP_G), 1);
 
         for (i = 0; i < sband->n_bitrates; i++) {
@@ -402,7 +403,7 @@ minstrel_rate_init(void *priv, struct ieee80211_supported_band *sband,
 
                 mr->rix = i;
                 mr->bitrate = sband->bitrates[i].bitrate / 5;
-                calc_rate_durations(local, mr, &sband->bitrates[i]);
+                calc_rate_durations(sband->band, mr, &sband->bitrates[i]);
 
                 /* calculate maximum number of retransmissions before
                  * fallback (based on maximum segment size) */
diff --git a/net/mac80211/rc80211_minstrel_ht.c b/net/mac80211/rc80211_minstrel_ht.c
index 3b3dcae13bb..2d1acc6c544 100644
--- a/net/mac80211/rc80211_minstrel_ht.c
+++ b/net/mac80211/rc80211_minstrel_ht.c
@@ -692,7 +692,6 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband,
         struct minstrel_ht_sta_priv *msp = priv_sta;
         struct minstrel_ht_sta *mi = &msp->ht;
         struct ieee80211_mcs_info *mcs = &sta->ht_cap.mcs;
-        struct ieee80211_local *local = hw_to_local(mp->hw);
         u16 sta_cap = sta->ht_cap.cap;
         int n_supported = 0;
         int ack_dur;
@@ -711,8 +710,8 @@ minstrel_ht_update_caps(void *priv, struct ieee80211_supported_band *sband,
         memset(mi, 0, sizeof(*mi));
         mi->stats_update = jiffies;
 
-        ack_dur = ieee80211_frame_duration(local, 10, 60, 1, 1);
-        mi->overhead = ieee80211_frame_duration(local, 0, 60, 1, 1) + ack_dur;
+        ack_dur = ieee80211_frame_duration(sband->band, 10, 60, 1, 1);
+        mi->overhead = ieee80211_frame_duration(sband->band, 0, 60, 1, 1) + ack_dur;
         mi->overhead_rtscts = mi->overhead + 2 * ack_dur;
 
         mi->avg_ampdu_len = MINSTREL_FRAC(1, 1);
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 4f6aac16ac3..0abbef952c1 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -159,7 +159,7 @@ static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
                 /* Time needed to transmit ACK
                  * (10 bytes + 4-byte FCS = 112 bits) plus SIFS; rounded up
                  * to closest integer */
-                dur = ieee80211_frame_duration(local, 10, rate, erp,
+                dur = ieee80211_frame_duration(sband->band, 10, rate, erp,
                                 tx->sdata->vif.bss_conf.use_short_preamble);
 
         if (next_frag_len) {
@@ -167,7 +167,7 @@ static __le16 ieee80211_duration(struct ieee80211_tx_data *tx,
                  * transmit next fragment plus ACK and 2 x SIFS. */
                 dur *= 2; /* ACK + SIFS */
                 /* next fragment */
-                dur += ieee80211_frame_duration(local, next_frag_len,
+                dur += ieee80211_frame_duration(sband->band, next_frag_len,
                                 txrate->bitrate, erp,
                                 tx->sdata->vif.bss_conf.use_short_preamble);
         }
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index e67fe5c1def..9d255a2e37e 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -106,7 +106,7 @@ void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
         }
 }
 
-int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
+int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
                              int rate, int erp, int short_preamble)
 {
         int dur;
@@ -120,7 +120,7 @@ int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
          * DIV_ROUND_UP() operations.
          */
 
-        if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ || erp) {
+        if (band == IEEE80211_BAND_5GHZ || erp) {
                 /*
                  * OFDM:
                  *
@@ -162,10 +162,10 @@ int ieee80211_frame_duration(struct ieee80211_local *local, size_t len,
 /* Exported duration function for driver use */
 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
                                         struct ieee80211_vif *vif,
+                                        enum ieee80211_band band,
                                         size_t frame_len,
                                         struct ieee80211_rate *rate)
 {
-        struct ieee80211_local *local = hw_to_local(hw);
         struct ieee80211_sub_if_data *sdata;
         u16 dur;
         int erp;
@@ -179,7 +179,7 @@ __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
                         erp = rate->flags & IEEE80211_RATE_ERP_G;
         }
 
-        dur = ieee80211_frame_duration(local, frame_len, rate->bitrate, erp,
+        dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
                                        short_preamble);
 
         return cpu_to_le16(dur);
@@ -198,7 +198,7 @@ __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
         u16 dur;
         struct ieee80211_supported_band *sband;
 
-        sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
+        sband = local->hw.wiphy->bands[frame_txctl->band];
 
         short_preamble = false;
 
@@ -213,13 +213,13 @@ __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
         }
 
         /* CTS duration */
-        dur = ieee80211_frame_duration(local, 10, rate->bitrate,
+        dur = ieee80211_frame_duration(sband->band, 10, rate->bitrate,
                                        erp, short_preamble);
         /* Data frame duration */
-        dur += ieee80211_frame_duration(local, frame_len, rate->bitrate,
+        dur += ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
                                         erp, short_preamble);
         /* ACK duration */
-        dur += ieee80211_frame_duration(local, 10, rate->bitrate,
+        dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
                                         erp, short_preamble);
 
         return cpu_to_le16(dur);
@@ -239,7 +239,7 @@ __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
         u16 dur;
         struct ieee80211_supported_band *sband;
 
-        sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
+        sband = local->hw.wiphy->bands[frame_txctl->band];
 
         short_preamble = false;
 
@@ -253,11 +253,11 @@ __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
         }
 
         /* Data frame duration */
-        dur = ieee80211_frame_duration(local, frame_len, rate->bitrate,
+        dur = ieee80211_frame_duration(sband->band, frame_len, rate->bitrate,
                                        erp, short_preamble);
         if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
                 /* ACK duration */
-                dur += ieee80211_frame_duration(local, 10, rate->bitrate,
+                dur += ieee80211_frame_duration(sband->band, 10, rate->bitrate,
                                                 erp, short_preamble);
         }
 
@@ -909,10 +909,8 @@ u32 ieee80211_mandatory_rates(struct ieee80211_local *local,
         int i;
 
         sband = local->hw.wiphy->bands[band];
-        if (!sband) {
-                WARN_ON(1);
-                sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
-        }
+        if (WARN_ON(!sband))
+                return 1;
 
         if (band == IEEE80211_BAND_2GHZ)
                 mandatory_flag = IEEE80211_RATE_MANDATORY_B;
@@ -1146,10 +1144,8 @@ u32 ieee80211_sta_get_rates(struct ieee80211_local *local,
         int i, j;
         sband = local->hw.wiphy->bands[band];
 
-        if (!sband) {
-                WARN_ON(1);
-                sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
-        }
+        if (WARN_ON(!sband))
+                return 1;
 
         bitrates = sband->bitrates;
         num_rates = sband->n_bitrates;