Return-path: Received: from mail.atheros.com ([12.36.123.2]:54823 "EHLO mail.atheros.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752657Ab0BJJEF (ORCPT ); Wed, 10 Feb 2010 04:04:05 -0500 Received: from mail.atheros.com ([10.10.20.108]) by sidewinder.atheros.com for ; Wed, 10 Feb 2010 01:04:05 -0800 From: Sujith MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Message-ID: <19314.31437.647232.84860@gargle.gargle.HOWL> Date: Wed, 10 Feb 2010 14:52:21 +0530 To: CC: , Subject: [PATCH] mac80211: Deny TX BA session requests during disassociation Sender: linux-wireless-owner@vger.kernel.org List-ID: In associated state, when bringing an interface down, existing BA sessions are torn down. When this is in progress, nothing prevents mac80211 from accepting another BA session start request. Use a new station flag to fix this. Signed-off-by: Sujith --- net/mac80211/agg-tx.c | 8 ++++++++ net/mac80211/mlme.c | 4 +++- net/mac80211/sta_info.h | 4 ++++ 3 files changed, 15 insertions(+), 1 deletions(-) diff --git a/net/mac80211/agg-tx.c b/net/mac80211/agg-tx.c index 718fbcf..5538e1b 100644 --- a/net/mac80211/agg-tx.c +++ b/net/mac80211/agg-tx.c @@ -237,6 +237,14 @@ int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid) sdata->vif.type != NL80211_IFTYPE_AP) return -EINVAL; + if (test_sta_flags(sta, WLAN_STA_DISASSOC)) { +#ifdef CONFIG_MAC80211_HT_DEBUG + printk(KERN_DEBUG "Disassociation is in progress. " + "Denying BA session request\n"); +#endif + return -EINVAL; + } + if (test_sta_flags(sta, WLAN_STA_SUSPEND)) { #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "Suspend in progress. " diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c index ee9443d..bfc4a50 100644 --- a/net/mac80211/mlme.c +++ b/net/mac80211/mlme.c @@ -797,8 +797,10 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata) rcu_read_lock(); sta = sta_info_get(sdata, bssid); - if (sta) + if (sta) { + set_sta_flags(sta, WLAN_STA_DISASSOC); ieee80211_sta_tear_down_BA_sessions(sta); + } rcu_read_unlock(); changed |= ieee80211_reset_erp_info(sdata); diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h index 5ff611a..822d845 100644 --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -42,6 +42,9 @@ * be in the queues * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping * station in power-save mode, reply when the driver unblocks. + * @WLAN_STA_DISASSOC: Disassociation in progress. + * This is used to reject TX BA session requests when disassociation + * is in progress. */ enum ieee80211_sta_info_flags { WLAN_STA_AUTH = 1<<0, @@ -57,6 +60,7 @@ enum ieee80211_sta_info_flags { WLAN_STA_SUSPEND = 1<<11, WLAN_STA_PS_DRIVER = 1<<12, WLAN_STA_PSPOLL = 1<<13, + WLAN_STA_DISASSOC = 1<<14, }; #define STA_TID_NUM 16 -- 1.6.6.1