ath9k: initialize hw prior to debugfs

debugfs uses the hardware for several debugfs files as such the
hardware must be initialized and available prior to its usage. The
same applies to when we free the hw structs -- free debufs file
entries prior to free'ing the hardware.

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

1 files changed, 14 insertions, 14 deletions

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 7f90cb872a69..0fe915acd21e 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1365,8 +1365,8 @@ void ath_detach(struct ath_softc *sc)
 	    ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
 		ath_gen_timer_free(ah, sc->btcoex.no_stomp_timer);
 
-	ath9k_hw_detach(ah);
 	ath9k_exit_debug(ah);
+	ath9k_hw_detach(ah);
 	sc->sc_ah = NULL;
 }
 
@@ -1626,10 +1626,8 @@ static int ath_init_softc(u16 devid, struct ath_softc *sc, u16 subsysid,
 		     (unsigned long)sc);
 
 	ah = kzalloc(sizeof(struct ath_hw), GFP_KERNEL);
-	if (!ah) {
-		r = -ENOMEM;
-		goto bad_no_ah;
-	}
+	if (!ah)
+		return -ENOMEM;
 
 	ah->hw_version.devid = devid;
 	ah->hw_version.subsysid = subsysid;
@@ -1651,15 +1649,18 @@ static int ath_init_softc(u16 devid, struct ath_softc *sc, u16 subsysid,
 	/* XXX assert csz is non-zero */
 	common->cachelsz = csz << 2;	/* convert to bytes */
 
-	if (ath9k_init_debug(ah) < 0)
-		dev_err(sc->dev, "Unable to create debugfs files\n");
-
 	r = ath9k_hw_init(ah);
 	if (r) {
 		ath_print(common, ATH_DBG_FATAL,
 			  "Unable to initialize hardware; "
 			  "initialization status: %d\n", r);
-		goto bad;
+		goto bad_free_hw;
+	}
+
+	if (ath9k_init_debug(ah) < 0) {
+		ath_print(common, ATH_DBG_FATAL,
+			  "Unable to create debugfs files\n");
+		goto bad_free_hw;
 	}
 
 	/* Get the hardware key cache size. */
@@ -1848,12 +1849,11 @@ bad2:
 	for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
 		if (ATH_TXQ_SETUP(sc, i))
 			ath_tx_cleanupq(sc, &sc->tx.txq[i]);
-bad:
+
+	ath9k_exit_debug(ah);
+bad_free_hw:
 	ath9k_hw_detach(ah);
-bad_no_ah:
-	ath9k_exit_debug(sc->sc_ah);
 	sc->sc_ah = NULL;
-
 	return r;
 }
 
@@ -1966,8 +1966,8 @@ error_attach:
 		if (ATH_TXQ_SETUP(sc, i))
 			ath_tx_cleanupq(sc, &sc->tx.txq[i]);
 
-	ath9k_hw_detach(ah);
 	ath9k_exit_debug(ah);
+	ath9k_hw_detach(ah);
 	sc->sc_ah = NULL;
 
 	return error;