mptcp: pm: remove duplicated error messages

mptcp_pm_parse_entry() and mptcp_pm_parse_addr() will already set a
error message in case of parsing issue.

Then, no need to override this error message with another less precise
one: "error parsing address".

Signed-off-by: Matthieu Baerts (NGI0) <[email protected]>

Author: matttbe

net/mptcp/pm_userspace.c

@@ -216,10 +216,8 @@ int mptcp_pm_nl_announce_doit(struct sk_buff *skb, struct genl_info *info)
 
 	addr = info->attrs[MPTCP_PM_ATTR_ADDR];
 	err = mptcp_pm_parse_entry(addr, info, true, &addr_val);
-	if (err < 0) {
-		GENL_SET_ERR_MSG(info, "error parsing local address");
+	if (err < 0)
 		goto announce_err;
-	}
 
 	if (addr_val.addr.id == 0) {
 		GENL_SET_ERR_MSG(info, "invalid addr id");
@@ -386,10 +384,8 @@ int mptcp_pm_nl_subflow_create_doit(struct sk_buff *skb, struct genl_info *info)
 
 	laddr = info->attrs[MPTCP_PM_ATTR_ADDR];
 	err = mptcp_pm_parse_entry(laddr, info, true, &entry);
-	if (err < 0) {
-		NL_SET_ERR_MSG_ATTR(info->extack, laddr, "error parsing local addr");
+	if (err < 0)
 		goto create_err;
-	}
 
 	if (entry.flags & MPTCP_PM_ADDR_FLAG_SIGNAL) {
 		GENL_SET_ERR_MSG(info, "invalid addr flags");
@@ -400,10 +396,8 @@ int mptcp_pm_nl_subflow_create_doit(struct sk_buff *skb, struct genl_info *info)
 
 	raddr = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE];
 	err = mptcp_pm_parse_addr(raddr, info, &addr_r);
-	if (err < 0) {
-		NL_SET_ERR_MSG_ATTR(info->extack, raddr, "error parsing remote addr");
+	if (err < 0)
 		goto create_err;
-	}
 
 	if (!mptcp_pm_addr_families_match(sk, &entry.addr, &addr_r)) {
 		GENL_SET_ERR_MSG(info, "families mismatch");
@@ -509,17 +503,13 @@ int mptcp_pm_nl_subflow_destroy_doit(struct sk_buff *skb, struct genl_info *info
 
 	laddr = info->attrs[MPTCP_PM_ATTR_ADDR];
 	err = mptcp_pm_parse_entry(laddr, info, true, &addr_l);
-	if (err < 0) {
-		NL_SET_ERR_MSG_ATTR(info->extack, laddr, "error parsing local addr");
+	if (err < 0)
 		goto destroy_err;
-	}
 
 	raddr = info->attrs[MPTCP_PM_ATTR_ADDR_REMOTE];
 	err = mptcp_pm_parse_addr(raddr, info, &addr_r);
-	if (err < 0) {
-		NL_SET_ERR_MSG_ATTR(info->extack, raddr, "error parsing remote addr");
+	if (err < 0)
 		goto destroy_err;
-	}
 
 #if IS_ENABLED(CONFIG_MPTCP_IPV6)
 	if (addr_l.addr.family == AF_INET && ipv6_addr_v4mapped(&addr_r.addr6)) {