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authorJohannes Berg <johannes.berg@intel.com>2013-02-22 14:07:56 +0100
committerJohannes Berg <johannes.berg@intel.com>2013-02-26 22:09:48 +0100
commit38a12b5b029dec6e6dad1b5d3269b4c356c44c0e (patch)
tree24e44adc832f8461c3d1e6499b60e21e7695c9d6
parent8a964f44e01ad3bbc208c3e80d931ba91b9ea786 (diff)
downloadop-kernel-dev-38a12b5b029dec6e6dad1b5d3269b4c356c44c0e.zip
op-kernel-dev-38a12b5b029dec6e6dad1b5d3269b4c356c44c0e.tar.gz
iwlwifi: mvm: fix AP/GO mode station removal
When stations are removed while packets are in the queue, we drain the queues first, and then remove the stations. If this happens in AP mode while the interface is removed the MAC context might be removed from the firmware before we removed the station(s), resulting in a SYSASSERT 3421. This is because we remove the MAC context from the FW in stop_ap(), but only flush the station drain work later in remove_interface(). Refactor the code a bit to have a common MAC context removal preparation first to solve this. Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
-rw-r--r--drivers/net/wireless/iwlwifi/mvm/mac80211.c19
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index e8264e1..7e169b0 100644
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -557,11 +557,9 @@ static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
return ret;
}
-static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif)
+static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
+ struct ieee80211_vif *vif)
{
- struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
- struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
u32 tfd_msk = 0, ac;
for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
@@ -594,12 +592,21 @@ static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
*/
flush_work(&mvm->sta_drained_wk);
}
+}
+
+static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif)
+{
+ struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+ struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+
+ iwl_mvm_prepare_mac_removal(mvm, vif);
mutex_lock(&mvm->mutex);
/*
* For AP/GO interface, the tear down of the resources allocated to the
- * interface should be handled as part of the bss_info_changed flow.
+ * interface is be handled as part of the stop_ap flow.
*/
if (vif->type == NL80211_IFTYPE_AP) {
iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
@@ -763,6 +770,8 @@ static void iwl_mvm_stop_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+ iwl_mvm_prepare_mac_removal(mvm, vif);
+
mutex_lock(&mvm->mutex);
mvmvif->ap_active = false;
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