From a8c459de1668043739ec330f1f843702edd119e9 Mon Sep 17 00:00:00 2001
From: Yi Zhao <yi.zhao@windriver.com>
Date: Tue, 29 Nov 2016 18:09:01 +0800
Subject: [PATCH] xfrm_user: fix return value from xfrm_user_rcv_msg

commit 83e2d0587ae859aae75fd9d246c409b10a6bd137 upstream.

It doesn't support to run 32bit 'ip' to set xfrm objdect on 64bit host.
But the return value is unknown for user program:

ip xfrm policy list
RTNETLINK answers: Unknown error 524

Replace ENOTSUPP with EOPNOTSUPP:

ip xfrm policy list
RTNETLINK answers: Operation not supported

Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Nathan Harold <nharold@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 net/xfrm/xfrm_user.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 5d9f25cb6426..90270d7110a3 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -2480,7 +2480,7 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh)
 
 #ifdef CONFIG_COMPAT
 	if (is_compat_task())
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 #endif
 
 	type = nlh->nlmsg_type;
-- 
2.11.0