ath9k: call ath9k_hw_detach() once upon hw init failure

If hw initialization fails (ath9k_hw_init()) on ath_init_softc()
we bail out and call ath9k_hw_detach(). The call ath9k_hw_detach()
is conditional though as ath9k_hw_init() could itself have called
ath9k_hw_detach(). Just describing this is itself a brain twister.
Avoid this nonsense by removing ath9k_hw_detach() from ath9k_hw_init().

Upon hw initialization failure we expect the callers to take care of
the cleanup.

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

2 files changed, 9 insertions, 18 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 633fe8b6f5f7..08715299f75d 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -898,26 +898,22 @@ static void ath9k_hw_init_11a_eeprom_fix(struct ath_hw *ah)
 
 int ath9k_hw_init(struct ath_hw *ah)
 {
-        int r;
+        int r = 0;
 
-        if (!ath9k_hw_devid_supported(ah->hw_version.devid)) {
-                r = -EOPNOTSUPP;
-                goto bad;
-        }
+        if (!ath9k_hw_devid_supported(ah->hw_version.devid))
+                return -EOPNOTSUPP;
 
         ath9k_hw_init_defaults(ah);
         ath9k_hw_init_config(ah);
 
         if (!ath9k_hw_set_reset_reg(ah, ATH9K_RESET_POWER_ON)) {
                 DPRINTF(ah->ah_sc, ATH_DBG_FATAL, "Couldn't reset chip\n");
-                r = -EIO;
-                goto bad;
+                return -EIO;
         }
 
         if (!ath9k_hw_setpower(ah, ATH9K_PM_AWAKE)) {
                 DPRINTF(ah->ah_sc, ATH_DBG_FATAL, "Couldn't wakeup chip\n");
-                r = -EIO;
-                goto bad;
+                return -EIO;
         }
 
         if (ah->config.serialize_regmode == SER_REG_MODE_AUTO) {
@@ -939,8 +935,7 @@ int ath9k_hw_init(struct ath_hw *ah)
                         "Mac Chip Rev 0x%02x.%x is not supported by "
                         "this driver\n", ah->hw_version.macVersion,
                         ah->hw_version.macRev);
-                r = -EOPNOTSUPP;
-                goto bad;
+                return -EOPNOTSUPP;
         }
 
         if (AR_SREV_9100(ah)) {
@@ -965,7 +960,7 @@ int ath9k_hw_init(struct ath_hw *ah)
 
         r = ath9k_hw_post_init(ah);
         if (r)
-                goto bad;
+                return r;
 
         ath9k_hw_init_mode_gain_regs(ah);
         ath9k_hw_fill_cap_info(ah);
@@ -975,7 +970,7 @@ int ath9k_hw_init(struct ath_hw *ah)
         if (r) {
                 DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
                         "Failed to initialize MAC address\n");
-                goto bad;
+                return r;
         }
 
         if (AR_SREV_9285(ah))
@@ -986,9 +981,6 @@ int ath9k_hw_init(struct ath_hw *ah)
         ath9k_init_nfcal_hist_buffer(ah);
 
         return 0;
-bad:
-        ath9k_hw_detach(ah);
-        return r;
 }
 
 static void ath9k_hw_init_bb(struct ath_hw *ah,
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index d3d2cb667dc6..a5475b7a59de 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1520,8 +1520,7 @@ bad2:
                 if (ATH_TXQ_SETUP(sc, i))
                         ath_tx_cleanupq(sc, &sc->tx.txq[i]);
 bad:
-        if (ah)
-                ath9k_hw_detach(ah);
+        ath9k_hw_detach(ah);
         sc->sc_ah = NULL;
 bad_no_ah:
         ath9k_exit_debug(sc);