[73/74] ath9k: fix beacon slot/buffer leak

[Greg KH]

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Felix Fietkau <nbd@xxxxxxxxxxx>

commit 74401773f80b6d42f7a4c6994ca0cca883b03745 upstream.

When cleaning up beacon buffers and slots, ath9k currently checks if
sc->ah->opmode is set to a beacon related mode before cleaning up
buffers.
An unfortunate ordering of interface up/down commands can lead to
sc->ah->opmode being set to monitor mode, while there are AP interfaces
present on the same wiphy.
Always cleaning up beacon buffers if present fixes this issue.

Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/net/wireless/ath/ath9k/main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -2285,10 +2285,10 @@ static void ath9k_remove_interface(struc
 	    (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT)) {
 		ath9k_ps_wakeup(sc);
 		ath9k_hw_stoptxdma(sc->sc_ah, sc->beacon.beaconq);
-		ath_beacon_return(sc, avp);
 		ath9k_ps_restore(sc);
 	}
 
+	ath_beacon_return(sc, avp);
 	sc->sc_flags &= ~SC_OP_BEACONS;
 
 	for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++) {


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