ath9k: set sc->sc_ah to NULL after freeing it

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 91bffc91bbb0..d3d2cb667dc6 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1278,6 +1278,7 @@ void ath_detach(struct ath_softc *sc)
                         ath_tx_cleanupq(sc, &sc->tx.txq[i]);
 
         ath9k_hw_detach(sc->sc_ah);
+        sc->sc_ah = NULL;
         ath9k_exit_debug(sc);
 }
 
@@ -1521,6 +1522,7 @@ bad2:
 bad:
         if (ah)
                 ath9k_hw_detach(ah);
+        sc->sc_ah = NULL;
 bad_no_ah:
         ath9k_exit_debug(sc);
 
@@ -1631,6 +1633,7 @@ error_attach:
                         ath_tx_cleanupq(sc, &sc->tx.txq[i]);
 
         ath9k_hw_detach(sc->sc_ah);
+        sc->sc_ah = NULL;
         ath9k_exit_debug(sc);
 
         return error;