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authorJohannes Berg <johannes@sipsolutions.net>2009-06-10 15:16:52 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-06-10 13:28:41 -0400
commit4e751843d406a4d0471c207872b9e24957de8357 (patch)
tree0f3aec11337d37d45215a8a498bd5ce6b6edc507
parent43f7853180ed522944b3b1d4979cdb9f2b103ca3 (diff)
mac80211: disable PS while probing AP
When associated, but probing the AP because we detected beacon loss, we need to disable powersave to be able to receive the probe response. Change the code to do that by checking whether we're trying to probe when determining the possibility of going into PS, and recalculate the PS ability at the necessary spots. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--net/mac80211/mlme.c45
1 files changed, 33 insertions, 12 deletions
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 898e9b02aaa..d779c57a822 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -651,7 +651,8 @@ void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
}
if (count == 1 && found->u.mgd.powersave &&
- (found->u.mgd.flags & IEEE80211_STA_ASSOCIATED)) {
+ (found->u.mgd.flags & IEEE80211_STA_ASSOCIATED) &&
+ !(found->u.mgd.flags & IEEE80211_STA_PROBEREQ_POLL)) {
s32 beaconint_us;
if (latency < 0)
@@ -1320,6 +1321,11 @@ void ieee80211_beacon_loss_work(struct work_struct *work)
#endif
ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
+
+ mutex_lock(&sdata->local->iflist_mtx);
+ ieee80211_recalc_ps(sdata->local, -1);
+ mutex_unlock(&sdata->local->iflist_mtx);
+
ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
ifmgd->ssid_len, NULL, 0);
@@ -1340,6 +1346,7 @@ static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
struct ieee80211_local *local = sdata->local;
struct sta_info *sta;
+ unsigned long last_rx;
bool disassoc = false;
/* TODO: start monitoring current AP signal quality and number of
@@ -1356,17 +1363,21 @@ static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
printk(KERN_DEBUG "%s: No STA entry for own AP %pM\n",
sdata->dev->name, ifmgd->bssid);
disassoc = true;
- goto unlock;
+ rcu_read_unlock();
+ goto out;
}
+ last_rx = sta->last_rx;
+ rcu_read_unlock();
+
if ((ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) &&
- time_after(jiffies, sta->last_rx + IEEE80211_PROBE_WAIT)) {
+ time_after(jiffies, last_rx + IEEE80211_PROBE_WAIT)) {
printk(KERN_DEBUG "%s: no probe response from AP %pM "
"- disassociating\n",
sdata->dev->name, ifmgd->bssid);
disassoc = true;
ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
- goto unlock;
+ goto out;
}
/*
@@ -1385,26 +1396,29 @@ static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
}
#endif
ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
+ mutex_lock(&local->iflist_mtx);
+ ieee80211_recalc_ps(local, -1);
+ mutex_unlock(&local->iflist_mtx);
ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
ifmgd->ssid_len, NULL, 0);
mod_timer(&ifmgd->timer, jiffies + IEEE80211_PROBE_WAIT);
- goto unlock;
+ goto out;
}
- if (time_after(jiffies, sta->last_rx + IEEE80211_PROBE_IDLE_TIME)) {
+ if (time_after(jiffies, last_rx + IEEE80211_PROBE_IDLE_TIME)) {
ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
+ mutex_lock(&local->iflist_mtx);
+ ieee80211_recalc_ps(local, -1);
+ mutex_unlock(&local->iflist_mtx);
ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
ifmgd->ssid_len, NULL, 0);
}
+ out:
if (!disassoc)
mod_timer(&ifmgd->timer,
jiffies + IEEE80211_MONITORING_INTERVAL);
-
- unlock:
- rcu_read_unlock();
-
- if (disassoc)
+ else
ieee80211_set_disassoc(sdata, true, true,
WLAN_REASON_PREV_AUTH_NOT_VALID);
}
@@ -1887,8 +1901,12 @@ static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
ieee80211_authenticate(sdata);
}
- if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL)
+ if (ifmgd->flags & IEEE80211_STA_PROBEREQ_POLL) {
ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
+ mutex_lock(&sdata->local->iflist_mtx);
+ ieee80211_recalc_ps(sdata->local, -1);
+ mutex_unlock(&sdata->local->iflist_mtx);
+ }
}
/*
@@ -1946,6 +1964,9 @@ static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
}
#endif
ifmgd->flags &= ~IEEE80211_STA_PROBEREQ_POLL;
+ mutex_lock(&local->iflist_mtx);
+ ieee80211_recalc_ps(local, -1);
+ mutex_unlock(&local->iflist_mtx);
}
ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);