wifi: iwlwifi: mvm: init vif works only once

[ Upstream commit 0bcc215 ] It's dangerous to re-initialize works repeatedly, especially delayed ones that have an associated timer, and even more so if they're not necessarily canceled inbetween. This can be the case for these workers here during FW restart scenarios, so make sure to initialize it only once. While at it, also ensure it is cancelled correctly. Fixes: f678061 ("iwlwifi: mvm: disconnect in case of bad channel switch parameters") Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com> Link: https://msgid.link/20240416134215.ddf8eece5eac.I4164f5c9c444b64a9abbaab14c23858713778e35@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
dyousad · Jun 12, 2024 · 1ea06a3 · 1ea06a3
1 parent f84b9b2
commit 1ea06a3
Show file tree

Hide file tree

Showing 3 changed files with 21 additions and 2 deletions.
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -1513,6 +1513,17 @@ static int iwl_mvm_alloc_bcast_mcast_sta(struct iwl_mvm *mvm,
 					IWL_STA_MULTICAST);
 }
 
+void iwl_mvm_mac_init_mvmvif(struct iwl_mvm *mvm, struct iwl_mvm_vif *mvmvif)
+{
+	lockdep_assert_held(&mvm->mutex);
+
+	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
+		return;
+
+	INIT_DELAYED_WORK(&mvmvif->csa_work,
+			  iwl_mvm_channel_switch_disconnect_wk);
+}
+
 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 				     struct ieee80211_vif *vif)
 {
@@ -1522,6 +1533,8 @@ static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 
 	mutex_lock(&mvm->mutex);
 
+	iwl_mvm_mac_init_mvmvif(mvm, mvmvif);
+
 	mvmvif->mvm = mvm;
 
 	/* the first link always points to the default one */
@@ -1595,8 +1608,6 @@ static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 		mvm->p2p_device_vif = vif;
 
 	iwl_mvm_tcm_add_vif(mvm, vif);
-	INIT_DELAYED_WORK(&mvmvif->csa_work,
-			  iwl_mvm_channel_switch_disconnect_wk);
 
 	if (vif->type == NL80211_IFTYPE_MONITOR) {
 		mvm->monitor_on = true;
@@ -1638,6 +1649,8 @@ static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
 void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
 				 struct ieee80211_vif *vif)
 {
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+
 	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 		/*
 		 * Flush the ROC worker which will flush the OFFCHANNEL queue.
@@ -1646,6 +1659,8 @@ void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
 		 */
 		flush_work(&mvm->roc_done_wk);
 	}
+
+	cancel_delayed_work_sync(&mvmvif->csa_work);
 }
 
 /* This function is doing the common part of removing the interface for

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mld-mac80211.c
@@ -13,6 +13,8 @@ static int iwl_mvm_mld_mac_add_interface(struct ieee80211_hw *hw,
 
 	mutex_lock(&mvm->mutex);
 
+	iwl_mvm_mac_init_mvmvif(mvm, mvmvif);
+
 	mvmvif->mvm = mvm;
 
 	/* Not much to do here. The stack will not allow interface

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h b/drivers/net/wireless/intel/iwlwifi/mvm/mvm.h
@@ -1737,6 +1737,8 @@ int iwl_mvm_load_d3_fw(struct iwl_mvm *mvm);
 
 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm);
 
+void iwl_mvm_mac_init_mvmvif(struct iwl_mvm *mvm, struct iwl_mvm_vif *mvmvif);
+
 /*
  * FW notifications / CMD responses handlers
  * Convention: iwl_mvm_rx_<NAME OF THE CMD>