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mac80211: avoid transmitting delBA to old AP

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When roaming while we have active BA session,
we can end up transmitting delBA frames to
the old AP while we're already on the new AP's
channel, which can cause warnings.

Simply avoid sending those frames, but still
tear down the internal session state, since
they are not really necessary anyway as we
will implicitly disassociate when sending the
association to the new AP.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2010-10-05 19:37:40 +02:00
committed by John W. Linville
parent 845d708e62
commit 53f73c09d6
11 changed files with 48 additions and 35 deletions
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18
net/mac80211/mlme.c
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@@ -921,7 +921,7 @@ static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
}
static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
bool remove_sta)
bool remove_sta, bool tx)
{
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_local *local = sdata->local;
@@ -960,7 +960,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
sta = sta_info_get(sdata, bssid);
if (sta) {
set_sta_flags(sta, WLAN_STA_BLOCK_BA);
ieee80211_sta_tear_down_BA_sessions(sta);
ieee80211_sta_tear_down_BA_sessions(sta, tx);
}
mutex_unlock(&local->sta_mtx);
@@ -1124,7 +1124,7 @@ static void __ieee80211_connection_loss(struct ieee80211_sub_if_data *sdata)
printk(KERN_DEBUG "Connection to AP %pM lost.\n", bssid);
ieee80211_set_disassoc(sdata, true);
ieee80211_set_disassoc(sdata, true, true);
mutex_unlock(&ifmgd->mtx);
mutex_lock(&local->mtx);
@@ -1197,7 +1197,7 @@ ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
printk(KERN_DEBUG "%s: deauthenticated from %pM (Reason: %u)\n",
sdata->name, bssid, reason_code);
ieee80211_set_disassoc(sdata, true);
ieee80211_set_disassoc(sdata, true, false);
mutex_lock(&sdata->local->mtx);
ieee80211_recalc_idle(sdata->local);
mutex_unlock(&sdata->local->mtx);
@@ -1229,7 +1229,7 @@ ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
printk(KERN_DEBUG "%s: disassociated from %pM (Reason: %u)\n",
sdata->name, mgmt->sa, reason_code);
ieee80211_set_disassoc(sdata, true);
ieee80211_set_disassoc(sdata, true, false);
mutex_lock(&sdata->local->mtx);
ieee80211_recalc_idle(sdata->local);
mutex_unlock(&sdata->local->mtx);
@@ -1880,7 +1880,7 @@ void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
printk(KERN_DEBUG "No probe response from AP %pM"
" after %dms, disconnecting.\n",
bssid, (1000 * IEEE80211_PROBE_WAIT)/HZ);
ieee80211_set_disassoc(sdata, true);
ieee80211_set_disassoc(sdata, true, true);
mutex_unlock(&ifmgd->mtx);
mutex_lock(&local->mtx);
ieee80211_recalc_idle(local);
@@ -2204,7 +2204,7 @@ int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
}
/* Trying to reassociate - clear previous association state */
ieee80211_set_disassoc(sdata, true);
ieee80211_set_disassoc(sdata, true, false);
}
mutex_unlock(&ifmgd->mtx);
@@ -2318,7 +2318,7 @@ int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
memcpy(bssid, req->bss->bssid, ETH_ALEN);
if (ifmgd->associated == req->bss) {
ieee80211_set_disassoc(sdata, false);
ieee80211_set_disassoc(sdata, false, true);
mutex_unlock(&ifmgd->mtx);
assoc_bss = true;
} else {
@@ -2401,7 +2401,7 @@ int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
sdata->name, req->bss->bssid, req->reason_code);
memcpy(bssid, req->bss->bssid, ETH_ALEN);
ieee80211_set_disassoc(sdata, false);
ieee80211_set_disassoc(sdata, false, true);
mutex_unlock(&ifmgd->mtx);