madwifi: return to the bss channel after an issued ap mode scan has been completed (fixes #6599)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20549 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/madwifi/patches/462-fix_ap_scan.patch

@@ -0,0 +1,26 @@
+--- a/net80211/ieee80211_scan_ap.c
++++ b/net80211/ieee80211_scan_ap.c
+@@ -595,6 +595,14 @@ ap_end(struct ieee80211_scan_state *ss, 
+ 
+ 	ic = vap->iv_ic;
+ 
++	/* if we're already running, switch back to the home channel */
++	if ((vap->iv_state == IEEE80211_S_RUN) &&
++	    (ic->ic_bsschan != IEEE80211_CHAN_ANYC)) {
++		ic->ic_curchan = ic->ic_bsschan;
++		ic->ic_set_channel(ic);
++		goto out;
++	}
++
+ 	/* record stats for the channel that was scanned last */
+ 	ic->ic_set_channel(ic);
+ 	spin_lock_irqsave(&channel_lock, sflags);
+@@ -648,6 +656,8 @@ ap_end(struct ieee80211_scan_state *ss, 
+ 		IEEE80211_SCHEDULE_TQUEUE(&as->as_actiontq);
+ 		res = 1;
+ 	}
++
++out:
+ 	SCAN_AP_UNLOCK_IRQ(as);
+ 	return res;
+ }