target/user: Fix up smatch warnings in tcmu_netlink_event

This patch fixes up the following unused return smatch warnings:

  drivers/target/target_core_user.c:778 tcmu_netlink_event warn: unused return: ret = nla_put_string()
  drivers/target/target_core_user.c:780 tcmu_netlink_event warn: unused `return: ret = nla_put_u32()

(Fix up missing semicolon: grover)
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/target_core_user.c

@@ -763,27 +763,27 @@ static int tcmu_netlink_event(enum tcmu_genl_cmd cmd, const char *name, int mino
 {
 	struct sk_buff *skb;
 	void *msg_header;
-	int ret;
+	int ret = -ENOMEM;
 
 	skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
 	if (!skb)
-		return -ENOMEM;
+		return ret;
 
 	msg_header = genlmsg_put(skb, 0, 0, &tcmu_genl_family, 0, cmd);
-	if (!msg_header) {
-		nlmsg_free(skb);
-		return -ENOMEM;
-	}
+	if (!msg_header)
+		goto free_skb;
 
 	ret = nla_put_string(skb, TCMU_ATTR_DEVICE, name);
+	if (ret < 0)
+		goto free_skb;
 
 	ret = nla_put_u32(skb, TCMU_ATTR_MINOR, minor);
+	if (ret < 0)
+		goto free_skb;
 
 	ret = genlmsg_end(skb, msg_header);
-	if (ret < 0) {
-		nlmsg_free(skb);
-		return ret;
-	}
+	if (ret < 0)
+		goto free_skb;
 
 	ret = genlmsg_multicast(&tcmu_genl_family, skb, 0,
 				TCMU_MCGRP_CONFIG, GFP_KERNEL);
@@ -793,6 +793,9 @@ static int tcmu_netlink_event(enum tcmu_genl_cmd cmd, const char *name, int mino
 		ret = 0;
 
 	return ret;
+free_skb:
+	nlmsg_free(skb);
+	return ret;
 }
 
 static int tcmu_configure_device(struct se_device *dev)