[PATCH 4.4 43/56] xfrm_user: fix return value from xfrm_user_rcv_msg

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yi Zhao <yi.zhao@xxxxxxxxxxxxx>

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@xxxxxxxxxxxxx>
Signed-off-by: Steffen Klassert <steffen.klassert@xxxxxxxxxxx>
Signed-off-by: Nathan Harold <nharold@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 net/xfrm/xfrm_user.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -2480,7 +2480,7 @@ static int xfrm_user_rcv_msg(struct sk_b
 
 #ifdef CONFIG_COMPAT
 	if (is_compat_task())
-		return -ENOTSUPP;
+		return -EOPNOTSUPP;
 #endif
 
 	type = nlh->nlmsg_type;