ath9k: unlock on error path in ath9k_change_interface()

There is a missing unlock when we hit the "No beacon slot available"
error condition.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 0348731accae..c5cf8639e721 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1456,6 +1456,7 @@ static int ath9k_change_interface(struct ieee80211_hw *hw,
         struct ath_wiphy *aphy = hw->priv;
         struct ath_softc *sc = aphy->sc;
         struct ath_common *common = ath9k_hw_common(sc->sc_ah);
+        int ret = 0;
 
         ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n");
         mutex_lock(&sc->mutex);
@@ -1465,7 +1466,8 @@ static int ath9k_change_interface(struct ieee80211_hw *hw,
         case NL80211_IFTYPE_ADHOC:
                 if (sc->nbcnvifs >= ATH_BCBUF) {
                         ath_err(common, "No beacon slot available\n");
-                        return -ENOBUFS;
+                        ret = -ENOBUFS;
+                        goto out;
                 }
                 break;
         case NL80211_IFTYPE_STATION:
@@ -1479,14 +1481,15 @@ static int ath9k_change_interface(struct ieee80211_hw *hw,
         default:
                 ath_err(common, "Interface type %d not yet supported\n",
                                 vif->type);
-                mutex_unlock(&sc->mutex);
-                return -ENOTSUPP;
+                ret = -ENOTSUPP;
+                goto out;
         }
         vif->type = new_type;
         vif->p2p = p2p;
 
+out:
         mutex_unlock(&sc->mutex);
-        return 0;
+        return ret;
 }
 
 static void ath9k_remove_interface(struct ieee80211_hw *hw,