mac80211: Remove unnecessary variable and label

The variable ret and label just used as return, so we delete it and
use the return statement instead of the goto statement.
Signed-off-by: Ndingsenjie <dingsenjie@yulong.com>
Link: https://lore.kernel.org/r/20210805064349.202148-1-dingsenjie@163.comSigned-off-by: NJohannes Berg <johannes.berg@intel.com>

net/mac80211/ibss.c

@@ -489,7 +489,6 @@ int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
 	const struct cfg80211_bss_ies *ies;
 	u16 capability = WLAN_CAPABILITY_IBSS;
 	u64 tsf;
-	int ret = 0;
 
 	sdata_assert_lock(sdata);
 
@@ -501,10 +500,8 @@ int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
 				ifibss->ssid_len, IEEE80211_BSS_TYPE_IBSS,
 				IEEE80211_PRIVACY(ifibss->privacy));
 
-	if (WARN_ON(!cbss)) {
-		ret = -EINVAL;
-		goto out;
-	}
+	if (WARN_ON(!cbss))
+		return -EINVAL;
 
 	rcu_read_lock();
 	ies = rcu_dereference(cbss->ies);
@@ -520,18 +517,14 @@ int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
 					   sdata->vif.bss_conf.basic_rates,
 					   capability, tsf, &ifibss->chandef,
 					   NULL, csa_settings);
-	if (!presp) {
-		ret = -ENOMEM;
-		goto out;
-	}
+	if (!presp)
+		return -ENOMEM;
 
 	rcu_assign_pointer(ifibss->presp, presp);
 	if (old_presp)
 		kfree_rcu(old_presp, rcu_head);
 
 	return BSS_CHANGED_BEACON;
- out:
-	return ret;
 }
 
 int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata)