ath6kl: fix scan operation while disconnect

If a scan operation is pending and in between a disconnect
event is received from firmware the scan results never get
sent back to cfg80211. This causes a scan failure and yields
a device/resource busy state upon retries. If a disconnect
event is received and scan is pending return the scan done
to the cfg80211 to enable futher scans to be issued.

Signed-off-by: Naveen Singh <nsingh@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/ath6kl/os/linux/cfg80211.c

@@ -627,6 +627,10 @@ ar6k_cfg80211_disconnect_event(struct ar6_softc *ar, u8 reason,
 
     AR_DEBUG_PRINTF(ATH_DEBUG_INFO, ("%s: reason=%u\n", __func__, reason));
 
+    if (ar->scan_request) {
+	cfg80211_scan_done(ar->scan_request, true);
+        ar->scan_request = NULL;
+    }
     if((ADHOC_NETWORK & ar->arNetworkType)) {
         if(NL80211_IFTYPE_ADHOC != ar->wdev->iftype) {
             AR_DEBUG_PRINTF(ATH_DEBUG_INFO,