mac80211_hwsim: move HWSIM_ATTR_RADIO_NAME parsing last

Avoid the need to kfree() the name in many places by moving
the name parsing last.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/mac80211_hwsim.c

@@ -3321,15 +3321,6 @@ static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
 	if (info->attrs[HWSIM_ATTR_NO_VIF])
 		param.no_vif = true;
 
-	if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
-		hwname = kasprintf(GFP_KERNEL, "%.*s",
-				   nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
-				   (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
-		if (!hwname)
-			return -ENOMEM;
-		param.hwname = hwname;
-	}
-
 	if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
 		param.use_chanctx = true;
 	else
@@ -3342,10 +3333,8 @@ static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
 	if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
 		u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);
 
-		if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom)) {
-			kfree(hwname);
+		if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom))
 			return -EINVAL;
-		}
 
 		idx = array_index_nospec(idx,
 					 ARRAY_SIZE(hwsim_world_regdom_custom));
@@ -3358,7 +3347,6 @@ static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
 			GENL_SET_ERR_MSG(info,"MAC is no valid source addr");
 			NL_SET_BAD_ATTR(info->extack,
 					info->attrs[HWSIM_ATTR_PERM_ADDR]);
-			kfree(hwname);
 			return -EINVAL;
 		}
 
@@ -3366,6 +3354,15 @@ static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
 		param.perm_addr = nla_data(info->attrs[HWSIM_ATTR_PERM_ADDR]);
 	}
 
+	if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
+		hwname = kasprintf(GFP_KERNEL, "%.*s",
+				   nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
+				   (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
+		if (!hwname)
+			return -ENOMEM;
+		param.hwname = hwname;
+	}
+
 	ret = mac80211_hwsim_new_radio(info, &param);
 	kfree(hwname);
 	return ret;