linux-kernel - [PATCH 5.6 17/41] net/mlx5e: replace EINVAL in mlx5e_flower_parse

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Date:   Tue,  9 Jun 2020 19:45:19 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Pablo Neira Ayuso <pablo@...filter.org>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [PATCH 5.6 17/41] net/mlx5e: replace EINVAL in mlx5e_flower_parse_meta()

From: Pablo Neira Ayuso <pablo@...filter.org>

[ Upstream commit a683012a8e77675a1947cc8f11f97cdc1d5bb769 ]

The drivers reports EINVAL to userspace through netlink on invalid meta
match. This is confusing since EINVAL is usually reserved for malformed
netlink messages. Replace it by more meaningful codes.

Fixes: 6d65bc64e232 ("net/mlx5e: Add mlx5e_flower_parse_meta support")
Signed-off-by: Pablo Neira Ayuso <pablo@...filter.org>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tc.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
@@ -1824,7 +1824,7 @@ static int mlx5e_flower_parse_meta(struc
 	flow_rule_match_meta(rule, &match);
 	if (match.mask->ingress_ifindex != 0xFFFFFFFF) {
 		NL_SET_ERR_MSG_MOD(extack, "Unsupported ingress ifindex mask");
-		return -EINVAL;
+		return -EOPNOTSUPP;
 	}
 
 	ingress_dev = __dev_get_by_index(dev_net(filter_dev),
@@ -1832,13 +1832,13 @@ static int mlx5e_flower_parse_meta(struc
 	if (!ingress_dev) {
 		NL_SET_ERR_MSG_MOD(extack,
 				   "Can't find the ingress port to match on");
-		return -EINVAL;
+		return -ENOENT;
 	}
 
 	if (ingress_dev != filter_dev) {
 		NL_SET_ERR_MSG_MOD(extack,
 				   "Can't match on the ingress filter port");
-		return -EINVAL;
+		return -EOPNOTSUPP;
 	}
 
 	return 0;