mac80211: refuse TX queue configuration on non-QoS HW

Drivers that don't support QoS also don't support
setting up their ACs, catch that early. While at
it, remove the input check since cfg80211 does it
now.

Also fix up the restart code to not try to set up
the queues in this case.

Finally also change the tx_conf array to have
IEEE80211_NUM_ACS entries instead of # of queues
since that's what it really needs.

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

1 files changed, 18 insertions, 12 deletions

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 1d4b8b7a5a33..2b62307825d4 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -769,19 +769,22 @@ void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
 {
         struct ieee80211_local *local = sdata->local;
         struct ieee80211_tx_queue_params qparam;
-        int queue;
+        int ac;
         bool use_11b;
         int aCWmin, aCWmax;
 
         if (!local->ops->conf_tx)
                 return;
 
+        if (local->hw.queues < IEEE80211_NUM_ACS)
+                return;
+
         memset(&qparam, 0, sizeof(qparam));
 
         use_11b = (local->hw.conf.channel->band == IEEE80211_BAND_2GHZ) &&
                  !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
 
-        for (queue = 0; queue < local->hw.queues; queue++) {
+        for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
                 /* Set defaults according to 802.11-2007 Table 7-37 */
                 aCWmax = 1023;
                 if (use_11b)
@@ -789,7 +792,7 @@ void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
                 else
                         aCWmin = 15;
 
-                switch (queue) {
+                switch (ac) {
                 case IEEE80211_AC_BK:
                         qparam.cw_max = aCWmax;
                         qparam.cw_min = aCWmin;
@@ -825,8 +828,8 @@ void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
 
                 qparam.uapsd = false;
 
-                sdata->tx_conf[queue] = qparam;
-                drv_conf_tx(local, sdata, queue, &qparam);
+                sdata->tx_conf[ac] = qparam;
+                drv_conf_tx(local, sdata, ac, &qparam);
         }
 
         /* after reinitialize QoS TX queues setting to default,
@@ -1226,14 +1229,17 @@ int ieee80211_reconfig(struct ieee80211_local *local)
         mutex_unlock(&local->sta_mtx);
 
         /* reconfigure tx conf */
-        list_for_each_entry(sdata, &local->interfaces, list) {
-                if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
-                    sdata->vif.type == NL80211_IFTYPE_MONITOR ||
-                    !ieee80211_sdata_running(sdata))
-                        continue;
+        if (hw->queues >= IEEE80211_NUM_ACS) {
+                list_for_each_entry(sdata, &local->interfaces, list) {
+                        if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
+                            sdata->vif.type == NL80211_IFTYPE_MONITOR ||
+                            !ieee80211_sdata_running(sdata))
+                                continue;
 
-                for (i = 0; i < hw->queues; i++)
-                        drv_conf_tx(local, sdata, i, &sdata->tx_conf[i]);
+                        for (i = 0; i < IEEE80211_NUM_ACS; i++)
+                                drv_conf_tx(local, sdata, i,
+                                            &sdata->tx_conf[i]);
+                }
         }
 
         /* reconfigure hardware */