mac80211: implement sta_add/sta_remove in sta_state

Instead of maintaining separate sta_add/sta_remove
callsites, implement it in sta_state when the driver
has no sta_state implementation.

The only behavioural change this should cause is in
secure mesh mode: with this the station entries will
only be created after the stations are set to AUTH.
Given which drivers support mesh, this seems to not
be a problem.

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

4 files changed, 19 insertions, 19 deletions

diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 4bd266ec533..70dfb6415c2 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -493,9 +493,18 @@ int drv_sta_state(struct ieee80211_local *local,
         check_sdata_in_driver(sdata);
 
         trace_drv_sta_state(local, sdata, &sta->sta, old_state, new_state);
-        if (local->ops->sta_state)
+        if (local->ops->sta_state) {
                 ret = local->ops->sta_state(&local->hw, &sdata->vif, &sta->sta,
                                             old_state, new_state);
+        } else if (old_state == IEEE80211_STA_AUTH &&
+                   new_state == IEEE80211_STA_ASSOC) {
+                ret = drv_sta_add(local, sdata, &sta->sta);
+                if (ret == 0)
+                        sta->uploaded = true;
+        } else if (old_state == IEEE80211_STA_ASSOC &&
+                   new_state == IEEE80211_STA_AUTH) {
+                drv_sta_remove(local, sdata, &sta->sta);
+        }
         trace_drv_return_int(local, ret);
         return ret;
 }
diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c
index af49ac4f082..2b53a5348ac 100644
--- a/net/mac80211/pm.c
+++ b/net/mac80211/pm.c
@@ -100,8 +100,6 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
                 if (sta->uploaded) {
                         enum ieee80211_sta_state state;
 
-                        drv_sta_remove(local, sta->sdata, &sta->sta);
-
                         state = sta->sta_state;
                         for (; state > IEEE80211_STA_NOTEXIST; state--)
                                 WARN_ON(drv_sta_state(local, sdata, sta,
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index fcd9027c669..5e577bd0e6a 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -365,7 +365,12 @@ static int sta_info_insert_drv_state(struct ieee80211_local *local,
         }
 
         if (!err) {
-                sta->uploaded = true;
+                /*
+                 * Drivers using legacy sta_add/sta_remove callbacks only
+                 * get uploaded set to true after sta_add is called.
+                 */
+                if (!local->ops->sta_add)
+                        sta->uploaded = true;
                 return 0;
         }
 
@@ -417,18 +422,9 @@ static int sta_info_insert_finish(struct sta_info *sta) __acquires(RCU)
 
         if (!sta->dummy || dummy_reinsert) {
                 /* notify driver */
-                err = drv_sta_add(local, sdata, &sta->sta);
-                if (err) {
-                        if (sdata->vif.type != NL80211_IFTYPE_ADHOC)
-                                goto out_err;
-                        printk(KERN_DEBUG "%s: failed to add IBSS STA %pM to "
-                                          "driver (%d) - keeping it anyway.\n",
-                               sdata->name, sta->sta.addr, err);
-                } else {
-                        err = sta_info_insert_drv_state(local, sdata, sta);
-                        if (err)
-                                goto out_err;
-                }
+                err = sta_info_insert_drv_state(local, sdata, sta);
+                if (err)
+                        goto out_err;
         }
 
         if (!dummy_reinsert) {
@@ -802,7 +798,6 @@ int __must_check __sta_info_destroy(struct sta_info *sta)
         }
 
         if (sta->uploaded) {
-                drv_sta_remove(local, sdata, &sta->sta);
                 ret = drv_sta_state(local, sdata, sta, IEEE80211_STA_NONE,
                                     IEEE80211_STA_NOTEXIST);
                 WARN_ON_ONCE(ret != 0);
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 8f8b4ecc776..264397aee81 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1187,8 +1187,6 @@ int ieee80211_reconfig(struct ieee80211_local *local)
                 if (sta->uploaded) {
                         enum ieee80211_sta_state state;
 
-                        WARN_ON(drv_sta_add(local, sta->sdata, &sta->sta));
-
                         for (state = IEEE80211_STA_NOTEXIST;
                              state < sta->sta_state - 1; state++)
                                 WARN_ON(drv_sta_state(local, sta->sdata, sta,