ath9k: set ah to null after freeing

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

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 6641fbe..633fe8b 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1232,6 +1232,7 @@ void ath9k_hw_detach(struct ath_hw *ah)
        ath9k_hw_rf_free(ah);
        ath9k_hw_setpower(ah, ATH9K_PM_FULL_SLEEP);
        kfree(ah);
+       ah = NULL;
 }
 
 /*******/