mac80211: remove bogus mod_timer() call

The IBSS code has a bogus mod_timer(..., 0) call,
we shouldn't ever pass a constant value to the
function since any constant value could be in the
future or the past.

However, invoking the timer here is not necessary
at all, since we just finished scanning and just
need to have the IBSS code run again from the
workqueue later, so factor out the work starting
and use that instead.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/ibss.c

@@ -798,6 +798,15 @@ static void ieee80211_ibss_work(struct work_struct *work)
 	}
 }
 
+static void ieee80211_queue_ibss_work(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
+	struct ieee80211_local *local = sdata->local;
+
+	set_bit(IEEE80211_IBSS_REQ_RUN, &ifibss->request);
+	ieee80211_queue_work(&local->hw, &ifibss->work);
+}
+
 static void ieee80211_ibss_timer(unsigned long data)
 {
 	struct ieee80211_sub_if_data *sdata =
@@ -810,8 +819,7 @@ static void ieee80211_ibss_timer(unsigned long data)
 		return;
 	}
 
-	set_bit(IEEE80211_IBSS_REQ_RUN, &ifibss->request);
-	ieee80211_queue_work(&local->hw, &ifibss->work);
+	ieee80211_queue_ibss_work(sdata);
 }
 
 #ifdef CONFIG_PM
@@ -859,7 +867,7 @@ void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local)
 		if (!sdata->u.ibss.ssid_len)
 			continue;
 		sdata->u.ibss.last_scan_completed = jiffies;
-		mod_timer(&sdata->u.ibss.timer, 0);
+		ieee80211_queue_ibss_work(sdata);
 	}
 	mutex_unlock(&local->iflist_mtx);
 }