mac80211: fix HW registration error paths

Station info state is started in allocation, so should be
destroyed on free (it's just a timer); rate control must
be freed if anything afterwards fails to initialize.

LED exit should be later, no need for locking there, but
it needs to be done also when rate init failed.

Also clean up the code by moving a label so the locking
doesn't have to be done separately.

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

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index d9ce336..46264cb 100644 (file)
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -1041,10 +1041,8 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
                ieee80211_max_network_latency;
        result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY,
                                     &local->network_latency_notifier);
-       if (result) {
-               rtnl_lock();
+       if (result)
                goto fail_pm_qos;
-       }
 
 #ifdef CONFIG_INET
        local->ifa_notifier.notifier_call = ieee80211_ifa_changed;
@@ -1072,15 +1070,15 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
  fail_ifa:
        pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY,
                               &local->network_latency_notifier);
-       rtnl_lock();
 #endif
  fail_pm_qos:
-       ieee80211_led_exit(local);
+       rtnl_lock();
+       rate_control_deinitialize(local);
        ieee80211_remove_interfaces(local);
  fail_rate:
        rtnl_unlock();
+       ieee80211_led_exit(local);
        ieee80211_wep_free(local);
-       sta_info_stop(local);
        destroy_workqueue(local->workqueue);
  fail_workqueue:
        wiphy_unregister(local->hw.wiphy);
@@ -1176,6 +1174,8 @@ void ieee80211_free_hw(struct ieee80211_hw *hw)
 
        kfree(rcu_access_pointer(local->tx_latency));
 
+       sta_info_stop(local);
+
        wiphy_free(local->hw.wiphy);
 }
 EXPORT_SYMBOL(ieee80211_free_hw);