mac80211: avoid crashing when no scan sdata

[pandora-kernel.git] / net / mac80211 / mlme.c

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 7ecda9d..dc60804 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -945,9 +945,13 @@ void ieee80211_beacon_loss_work(struct work_struct *work)
                             u.mgd.beacon_loss_work);
        struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
 
-       printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
-              "- sending probe request\n", sdata->dev->name,
-              sdata->u.mgd.bssid);
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+       if (net_ratelimit()) {
+               printk(KERN_DEBUG "%s: driver reports beacon loss from AP %pM "
+                      "- sending probe request\n", sdata->dev->name,
+                      sdata->u.mgd.bssid);
+       }
+#endif
 
        ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
        ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
@@ -1007,9 +1011,13 @@ static void ieee80211_associated(struct ieee80211_sub_if_data *sdata)
              (local->hw.conf.flags & IEEE80211_CONF_PS)) &&
            time_after(jiffies,
                       ifmgd->last_beacon + IEEE80211_MONITORING_INTERVAL)) {
-               printk(KERN_DEBUG "%s: beacon loss from AP %pM "
-                      "- sending probe request\n",
-                      sdata->dev->name, ifmgd->bssid);
+#ifdef CONFIG_MAC80211_VERBOSE_DEBUG
+               if (net_ratelimit()) {
+                       printk(KERN_DEBUG "%s: beacon loss from AP %pM "
+                              "- sending probe request\n",
+                              sdata->dev->name, ifmgd->bssid);
+               }
+#endif
                ifmgd->flags |= IEEE80211_STA_PROBEREQ_POLL;
                ieee80211_send_probe_req(sdata, ifmgd->bssid, ifmgd->ssid,
                                         ifmgd->ssid_len, NULL, 0);
@@ -2105,12 +2113,13 @@ void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
        struct ieee80211_local *local =
                container_of(work, struct ieee80211_local,
                             dynamic_ps_enable_work);
+       /* XXX: using scan_sdata is completely broken! */
        struct ieee80211_sub_if_data *sdata = local->scan_sdata;
 
        if (local->hw.conf.flags & IEEE80211_CONF_PS)
                return;
 
-       if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
+       if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK && sdata)
                ieee80211_send_nullfunc(local, sdata, 1);
 
        local->hw.conf.flags |= IEEE80211_CONF_PS;