ath5k: read sc->imask with sc->irqlock held

Signed-off-by: Pavel Roskin <proski@gnu.org>
sc->imask may change if ath5k_set_current_imask() races against itself.
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath5k/base.c b/drivers/net/wireless/ath/ath5k/base.c
index 58997d3..28113e0 100644 (file)
--- a/drivers/net/wireless/ath/ath5k/base.c
+++ b/drivers/net/wireless/ath/ath5k/base.c
@@ -1447,10 +1447,11 @@ ath5k_receive_frame_ok(struct ath5k_softc *sc, struct ath5k_rx_status *rs)
 static void
 ath5k_set_current_imask(struct ath5k_softc *sc)
 {
-       enum ath5k_int imask = sc->imask;
+       enum ath5k_int imask;
        unsigned long flags;
 
        spin_lock_irqsave(&sc->irqlock, flags);
+       imask = sc->imask;
        if (sc->rx_pending)
                imask &= ~AR5K_INT_RX_ALL;
        if (sc->tx_pending)