[PATCH] Restore channel setting after scan.

After a scan, we weren't switching back to the original channel if we
were associated with an AP. So NetworkManager's periodic scans would
disrupt connectivity until the ESSID was manually set again. Fix that.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/ieee80211/softmac/ieee80211softmac_scan.c

@@ -232,6 +232,13 @@ void ieee80211softmac_scan_finished(struct ieee80211softmac_device *sm)
 	sm->scanning = 0;
 	spin_unlock_irqrestore(&sm->lock, flags);
 	
+	if (sm->associnfo.bssvalid) {
+		struct ieee80211softmac_network *net;
+
+		net = ieee80211softmac_get_network_by_bssid(sm, sm->associnfo.bssid);
+		if (net)
+			sm->set_channel(sm->dev, net->channel);
+	}
 	ieee80211softmac_call_events(sm, IEEE80211SOFTMAC_EVENT_SCAN_FINISHED, NULL);
 }
 EXPORT_SYMBOL_GPL(ieee80211softmac_scan_finished);