commit b063bc5ea77b1c1c0e7798f641f53504d0f64bf8
author Richard Alpe <richard.alpe@ericsson.com> Wed May 06 13:58:56 2015 +0200
committer David S. Miller <davem@davemloft.net> Sat May 09 16:40:03 2015 -0400
tree f4b5be88e60e36a238012842e9a816fdd566ce5f
parent 670f4f8818ee54d0c1831e3165dadd5b8a3f713e

tipc: send explicit not supported error in nl compat

The legacy netlink API treated EPERM (permission denied) as
"operation not supported".

Reported-by: Tomi Ollila <tomi.ollila@iki.fi>
Signed-off-by: Richard Alpe <richard.alpe@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/tipc/netlink_compat.c

diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c
index 809aaf0..53e0fee 100644
--- a/net/tipc/netlink_compat.c
+++ b/net/tipc/netlink_compat.c
@@ -1121,7 +1121,7 @@
 	}
 
 	err = tipc_nl_compat_handle(&msg);
-	if (err == -EOPNOTSUPP)
+	if ((err == -EOPNOTSUPP) || (err == -EPERM))
 		msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
 	else if (err == -EINVAL)
 		msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);