mac80211: fix regression when initializing ibss wmm params

There appear to be two regressions in ibss.c when calling
ieee80211_sta_def_wmm_params():
 * the second argument should be a rate length, not a rate array. This
   was introduced by my commit "mac80211: select and adjust bitrates
   according to channel mode"
 * the third argument is not initialized (anymore), making further
   checks within this function useless.

Since ieee80211_sta_def_wmm_params() is only used by ibss anyway,
remove the function entirely and handle the operating mode decision
immediately.

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 449702d..83197c3 100644 (file)
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -49,9 +49,9 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
        struct ieee80211_supported_band *sband;
        struct cfg80211_bss *bss;
        u32 bss_change, rate_flags, rates = 0, rates_added = 0;
-       u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
        struct cfg80211_chan_def chandef;
        enum nl80211_bss_scan_width scan_width;
+       bool have_higher_than_11mbit = false;
        struct beacon_data *presp;
        int frame_len;
        int shift;
@@ -149,6 +149,8 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
        for (i = 0; i < sband->n_bitrates; i++) {
                if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
                        continue;
+               if (sband->bitrates[i].bitrate > 110)
+                       have_higher_than_11mbit = true;
 
                rates |= BIT(i);
                rates_n++;
@@ -270,11 +272,17 @@ static void __ieee80211_sta_join_ibss(struct ieee80211_sub_if_data *sdata,
        sdata->vif.bss_conf.use_short_slot = chan->band == IEEE80211_BAND_5GHZ;
        bss_change |= BSS_CHANGED_ERP_SLOT;
 
+       /* cf. IEEE 802.11 9.2.12 */
+       if (chan->band == IEEE80211_BAND_2GHZ && have_higher_than_11mbit)
+               sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
+       else
+               sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
+
        sdata->vif.bss_conf.ibss_joined = true;
        sdata->vif.bss_conf.ibss_creator = creator;
        ieee80211_bss_info_change_notify(sdata, bss_change);
 
-       ieee80211_sta_def_wmm_params(sdata, rates, supp_rates);
+       ieee80211_set_wmm_default(sdata, true);
 
        ifibss->state = IEEE80211_IBSS_MLME_JOINED;
        mod_timer(&ifibss->timer,

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 23a191b..3d32df1 100644 (file)
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1615,9 +1615,6 @@ void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata, u8 *dst,
                              u32 ratemask, bool directed, u32 tx_flags,
                              struct ieee80211_channel *channel, bool scan);
 
-void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
-                                 const size_t supp_rates_len,
-                                 const u8 *supp_rates);
 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
                            struct ieee802_11_elems *elems,
                            enum ieee80211_band band, u32 *basic_rates);

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 1e45891..d23c5a7 100644 (file)
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1073,32 +1073,6 @@ void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
        }
 }
 
-void ieee80211_sta_def_wmm_params(struct ieee80211_sub_if_data *sdata,
-                                 const size_t supp_rates_len,
-                                 const u8 *supp_rates)
-{
-       struct ieee80211_chanctx_conf *chanctx_conf;
-       int i, have_higher_than_11mbit = 0;
-
-       /* cf. IEEE 802.11 9.2.12 */
-       for (i = 0; i < supp_rates_len; i++)
-               if ((supp_rates[i] & 0x7f) * 5 > 110)
-                       have_higher_than_11mbit = 1;
-
-       rcu_read_lock();
-       chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
-
-       if (chanctx_conf &&
-           chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ &&
-           have_higher_than_11mbit)
-               sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
-       else
-               sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
-       rcu_read_unlock();
-
-       ieee80211_set_wmm_default(sdata, true);
-}
-
 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
                         u16 transaction, u16 auth_alg, u16 status,
                         const u8 *extra, size_t extra_len, const u8 *da,