mac80211: refactor drop connection/unlock in CSA processing

The schedule_work()/mutex unlocking code is duplicated many times,
refactor that to a common place in the function.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 539d6a9..1999bc0 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -1157,11 +1157,7 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
        if (!conf) {
                sdata_info(sdata,
                           "no channel context assigned to vif?, disconnecting\n");
-               ieee80211_queue_work(&local->hw,
-                                    &ifmgd->csa_connection_drop_work);
-               mutex_unlock(&local->chanctx_mtx);
-               mutex_unlock(&local->mtx);
-               return;
+               goto drop_connection;
        }
 
        chanctx = container_of(conf, struct ieee80211_chanctx, conf);
@@ -1170,11 +1166,7 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
            !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
                sdata_info(sdata,
                           "driver doesn't support chan-switch with channel contexts\n");
-               ieee80211_queue_work(&local->hw,
-                                    &ifmgd->csa_connection_drop_work);
-               mutex_unlock(&local->chanctx_mtx);
-               mutex_unlock(&local->mtx);
-               return;
+               goto drop_connection;
        }
 
        ch_switch.timestamp = timestamp;
@@ -1186,11 +1178,7 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
        if (drv_pre_channel_switch(sdata, &ch_switch)) {
                sdata_info(sdata,
                           "preparing for channel switch failed, disconnecting\n");
-               ieee80211_queue_work(&local->hw,
-                                    &ifmgd->csa_connection_drop_work);
-               mutex_unlock(&local->chanctx_mtx);
-               mutex_unlock(&local->mtx);
-               return;
+               goto drop_connection;
        }
 
        res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
@@ -1199,11 +1187,7 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
                sdata_info(sdata,
                           "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
                           res);
-               ieee80211_queue_work(&local->hw,
-                                    &ifmgd->csa_connection_drop_work);
-               mutex_unlock(&local->chanctx_mtx);
-               mutex_unlock(&local->mtx);
-               return;
+               goto drop_connection;
        }
        mutex_unlock(&local->chanctx_mtx);
 
@@ -1232,6 +1216,11 @@ ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
                mod_timer(&ifmgd->chswitch_timer,
                          TU_TO_EXP_TIME((csa_ie.count - 1) *
                                         cbss->beacon_interval));
+       return;
+ drop_connection:
+       ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
+       mutex_unlock(&local->chanctx_mtx);
+       mutex_unlock(&local->mtx);
 }
 
 static bool