Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967689Ab3HICPc (ORCPT ); Thu, 8 Aug 2013 22:15:32 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:55712 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S967569Ab3HIB64 (ORCPT ); Thu, 8 Aug 2013 21:58:56 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Emmanuel Grumbach , Johannes Berg Subject: [ 034/102] iwlwifi: mvm: fix flushing not started aggregation sessions Date: Thu, 8 Aug 2013 18:57:10 -0700 Message-Id: <20130809015017.807948129@linuxfoundation.org> X-Mailer: git-send-email 1.8.3.rc0.20.gb99dd2e In-Reply-To: <20130809015010.208118575@linuxfoundation.org> References: <20130809015010.208118575@linuxfoundation.org> User-Agent: quilt/0.60-5.1.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3242 Lines: 82 3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johannes Berg commit b6658ff80c43bcf84be0bbe371c88af1452e7776 upstream. When a not fully started aggregation session is destroyed and flushed, we get a warning, e.g. WARNING: at drivers/net/wireless/iwlwifi/pcie/tx.c:1142 iwl_trans_pcie_txq_disable+0x11c/0x160 queue 16 not used Modules linked in: [...] Pid: 5135, comm: hostapd Tainted: G W O 3.5.0 #10 Call Trace: wlan0: driver sets block=0 for sta 00:03:7f:10:44:d3 [] warn_slowpath_common+0x72/0xa0 [] warn_slowpath_fmt+0x47/0x50 [] iwl_trans_pcie_txq_disable+0x11c/0x160 [iwlwifi] [] iwl_mvm_sta_tx_agg_flush+0xe9/0x150 [iwlmvm] [] iwl_mvm_mac_ampdu_action+0xf3/0x1e0 [iwlmvm] [] ___ieee80211_stop_tx_ba_session+0x193/0x920 [mac80211] [] __ieee80211_stop_tx_ba_session+0x48/0x70 [mac80211] [] ieee80211_sta_tear_down_BA_sessions+0x4f/0x80 [mac80211] [] __sta_info_destroy+0x66/0x370 [mac80211] [] sta_info_destroy_addr_bss+0x44/0x70 [mac80211] [] ieee80211_del_station+0x26/0x50 [mac80211] [] nl80211_del_station+0x85/0x200 [cfg80211] when a station deauthenticated from us without fully setting up the aggregation session. Fix this by checking the aggregation state before removing the hardware queue. Reviewed-by: Emmanuel Grumbach Signed-off-by: Johannes Berg Signed-off-by: Greg Kroah-Hartman --- drivers/net/wireless/iwlwifi/mvm/sta.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) --- a/drivers/net/wireless/iwlwifi/mvm/sta.c +++ b/drivers/net/wireless/iwlwifi/mvm/sta.c @@ -898,6 +898,7 @@ int iwl_mvm_sta_tx_agg_flush(struct iwl_ struct iwl_mvm_sta *mvmsta = (void *)sta->drv_priv; struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; u16 txq_id; + enum iwl_mvm_agg_state old_state; /* * First set the agg state to OFF to avoid calling @@ -907,13 +908,17 @@ int iwl_mvm_sta_tx_agg_flush(struct iwl_ txq_id = tid_data->txq_id; IWL_DEBUG_TX_QUEUES(mvm, "Flush AGG: sta %d tid %d q %d state %d\n", mvmsta->sta_id, tid, txq_id, tid_data->state); + old_state = tid_data->state; tid_data->state = IWL_AGG_OFF; spin_unlock_bh(&mvmsta->lock); - if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true)) - IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); + if (old_state >= IWL_AGG_ON) { + if (iwl_mvm_flush_tx_path(mvm, BIT(txq_id), true)) + IWL_ERR(mvm, "Couldn't flush the AGG queue\n"); + + iwl_trans_txq_disable(mvm->trans, tid_data->txq_id); + } - iwl_trans_txq_disable(mvm->trans, tid_data->txq_id); mvm->queue_to_mac80211[tid_data->txq_id] = IWL_INVALID_MAC80211_QUEUE; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/